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| 1. general description the SSL4120 integrates a power factor correc tor (pfc) controller and a controller for a half-bridge resonant converter (h bc) in a multi-chip ic. it provides the drive function for the discrete mosfet in an up-converter and for the two discrete power mosfets in a resonant half-bridge configuration. efficient pfc operation is achieved by impl ementing functions for quasi-resonant (qr) operation at high-power levels and qr with valley skipping at lower power levels. overcurrent protection (ocp), overvolta ge protection (ovp) and demagnetization sensing ensure safe operation under all conditions the hbc module is a high-voltage controlle r for a zero-voltage switching llc resonant converter. it contains a high-voltage level shift circuit and several protection circuits including ocp, open-loop protection, capaciti ve mode protection and a general purpose latched protection input. the high-voltage chip is fabr icated using a proprietary high -voltage bipolar-cmos-dmos power logic process enabling efficient direct start-up from the rectified universal mains voltage. the low-voltage silicon -on-insulator (soi) chip is used for accurate, high-speed protection functions and control. the SSL4120 controlled pfc circuit and resonant converter topology is very flexible. it can be used for a broad range of applications over a wide mains voltage range. combining pfc and hbc controllers in a single ic makes the SSL4120 ideal for controlling compact power supp lies in lighting applicatio ns, such as led drivers. using the SSL4120, highly efficient and reliable power supplies providing over 100 w can be designed easily which use the minimum of external components. remark: unless otherwise stated, all values are typical. SSL4120 resonant power supply controller ic with pfc for led lighting rev. 2 ? 1 november 2012 product data sheet
SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 2 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 2. features and benefits 2.1 general features ? integrated pfc and hbc controllers ? universal mains supply operat ion from 85 v to 305 v (ac) ? high level of integration resulting in a low external component count and a cost effective design ? enable input to enable only the pfc or both the pfc and hbc controllers ? on-chip high-voltage start-up source ? stand-alone operation or ic supplied from external dc source 2.2 pfc controller features ? boundary mode operation with on-time control ? valley/zero-voltage switching for minimum switching losses ? frequency limiting to reduce switching losses ? accurate boost voltage regulation ? burst mode switching with so ft-start and soft-stop 2.3 hbc controller features ? integrated high-voltage level shifter ? adjustable minimum and maximum frequency ? maximum 500 khz half-bri dge switching frequency ? adaptive non-overlap time ? burst mode switching 2.4 protection features ? safe restart mode for system fault conditions ? general latched protection input for output overvoltage protection or external temperature protection ? protection timer for time-out and restart ? overtemperature protection ? soft (re)start for both controllers ? undervoltage protection for mains (brownout), boost, ic supply and output voltage ? overcurrent regulation and protection for both controllers ? accurate overvoltage protection for the boost voltage ? capacitive mode protecti on for the hbc controller 3. applications the ic is used in all led lighting applications that require very efficient, low total harmonic distortion (thd), high power factor (pf) and a universal mains input voltage. the SSL4120 provides a cost-effective po wer supply solution between 25 w and 400 w. SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 3 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 4. ordering information 5. block diagram table 1. ordering information type number package name description version SSL4120t so24 plastic small outline package; 24 leads; body width 7.5 mm sot137-1 fig 1. SSL4120 block diagram ! !"! ! !! " # ! " ! ! ! $ ! " % ! " ! " ! & ' % ( )* + , )- - ! ) . / * -/ ! !0 -* )/ -) -1 )+ )2 )1 ). 3 2 ! ! " )3 " -- # !0 ()43/ (/42 () ) (-4/ (142 142 (14* ()4) *4) .4. ,4* ! % " ! ! ! ' % # 5678 59 :567 " ! ; " ! ! " ! (-- #(). (-1 (-42 ()2 ! (14* (341 (/41 (-4/ ()4, (341 (24, (/4- (-4,/ ()14/ ()14+ ! " ! $ ! % " ! 14) (14*2 ! " ! ! !% ' % " ! ! " ! ! # (-4- ()4- (142 ! ()4)2 ! ! " " ! SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 4 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 6. pinning information 6.1 pinning 6.2 pin description fig 2. SSL4120t pin configuration table 2. pin description symbol pin description comppfc 1 pfc controller frequency compensation. externally connected to filter snsmains 2 mains voltage sense input. externally connected to resistive divided mains voltage snsauxpfc 3 pfc demagnetization timing sense input. externally connected to the pfc auxiliary winding snscurpfc 4 pfc controller sense input for momentary current and soft-start. externally connected to current sense resistor and soft-start filter snsout 5 ? hbc output voltage sense input ? hbc controller or pfc and hbc controllers sense input for burst mode externally connected to the hbc transformer auxiliary winding supic 6 supic input low-voltage supply and ou tput of internal hv start-up source. externally connected to hbc transformer auxiliary winding or to the external dc supply gatepfc 7 pfc mosfet gate driver output pgnd 8 power ground. hbc low-side and pfc driver reference (ground) supreg 9 regulated supreg ic supply; in ternal regulator output; input drivers. externally connected to supreg buffer capacitor gatels 10 hbc low-side mosfet gate driver output n.c. 11 not connected; high-voltage spacer. SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 5 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting suphv 12 internal hv start-up source high-voltage supply input. externally connected to the boost voltage gatehs 13 hbc high-side mosfet gate driver output suphs 14 high-side driver supply input. externally connected to the bootstrap capacitor hb 15 reference for high-side driver and input for half-bridge slope detection. externally connected to half-bri dge node hb between hbc mosfets (see figure 19 ) n.c. 16 not connected; high-voltage spacer snscurhbc 17 momentary hbc current sense input. externally connected to the resonant current sense resistor sgnd 18 signal ground and ic reference (ground). cfmin 19 hbc minimum frequency setting. externally connected to the capacitor rfmax 20 hbc maximum frequency setting. externally connected to the resistor snsfb 21 output voltage regulation feedback sense input. externally connected to opto-coupler sshbc/en 22 ? hbc soft-start timing input ? ic enable input. enables pfc only or both pfc and hbc controllers. externally connected to soft-start capacitor and enable pull-down signal rcprot 23 protection ti mer setting for time-out and restart. externally connected to resistor and capacitor snsboost 24 sense input for boost voltage regulation. externally connected to resistive divided v boost table 2. pin description ?continued symbol pin description SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 6 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7. functional description 7.1 overview of ic modules the functionality of the ssl41 20 is grouped as follows: ? supply module: supply management for the ic. includes the restart and (latched) shut-down states ? protection and restart timer: an externally adjustable timer used for delayed protection and restart timing ? enable input: control input for enabling and disabling the controllers. when disabled has very low current consumption ? pfc controller: controls and protects the power factor converter. generates a 400 v (dc) boost voltage v boost from the rectified ac mains input with a high pf ? hbc controller: controls and protects the resonant conver ter. generates a regulated, mains isolated output voltage from the 400 v (dc) boost voltage v boost figure 1 shows the block diagram of the SSL4120. a typical application is shown in figure 19 . SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 7 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.2 power supply the SSL4120 contains several supply-rel ated pins supic, supreg, suphs and suphv. these pins are described in section 7.2.1 to section 7.2.4 7.2.1 low-voltage supply input (supic pin) the supic pin is the main low-voltage supply input to the ic. all internal circuits are supplied from this pin directly or indirectly using the supreg pin. the high-voltage circuit however, is not supplied from the supic pin. the supic pin is connected externally to a buffer capacitor c supic . this buffer capacitor can be charged in several ways: ? from the internal high voltage start-up source ? from the hbc transformer auxiliary winding ? from the switching half-bridge node capacitive supply ? from an external dc supply, for example, a standby supply the ic starts operating when voltage on the supic pin reaches the start level, provided the voltage on the supreg pin has also reac hed the start level. the start level depends on the condition of the suphv pin: ? high voltage present on the suphv pin (v suphv >v det(suphv) ). in a stand-alone application this is the case because c supic is initially charged from the hv start-up source . the start level is v start(hvd)(supic) = 22 v. the wide difference between the start and stop (v uvp(supic) ) levels allows suffici ent energy to be drawn from the supic buffer capacitor until the output voltage stabilizes. ? not connected or voltage not present on the suphv pin (v suphv SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 8 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting ? boost charge state the pfc controller is switching; the hbc controller is off. the current from the high-voltage start-up source is large enough to supply the supic pin (current consumption < i ch(nom)(supic) ). ? operational supply state both the pfc and hbc controllers are switching. current consumption is i oper(supic) . when the hbc controller is enabled, the switching frequency is initially high and the hbc mosfet drivers current consumption is dominant. the stored energy in c supic supplies the initial supic cu rrent before the supic supply source takes over. the supic pin has a low short-circuit detection voltage (v scp(supic) =0.65v). the current dissipated in the hv start- up source is limited while v supic < v scp(supic) (see section 7.2.4 ). 7.2.2 regulated supply (supreg pin) the voltage range on the supic pin exceeds that of the external mosfets gate voltages. the SSL4120 contains an integrated series stabilizer for this reason. the series stabilizer creates an accu rate regulated voltage (v reg(supreg) = 10.9 v) at the buffer capacitor c supreg . this stabilized voltage is used to: ? supply the internal pfc driver remark: the internal supic pin supply provides most of the external mosfet charge current. ? supply the internal low-side hbc driver ? supply the internal high-side driver using external components ? as a reference voltage for optional external circuits the supreg series stabilizer is enabled after c supic has been fully charged. enabling the stabilizer after charging c supic ensures any optional external circuitry connected to supreg does not dissipate any of the start-up current. to ensure that the external mosfets receive sufficient gate drive current, the voltage on the supreg pin must reach v start(supreg) . in addition, the voltage on the supic pin must reach the start level. the ic starts operating when both voltages reach their start levels. supreg is provided with undervol tage protection (uvp-supreg; see section 7.9 ). when v supreg SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 10 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting fig 3. SSL4120 flow diagram no supply -all off uvp supplies = no uvp supplies = yes disabled lc -only "enable lc" detection active enable pfc = yes thermal hold -minimum functionality active otp = no supic charge -hv start-up source on uvp supic = no otp = yes state name explanation flow diagram symbols -action 1 -action 2 -... disabled items are not mentioned exit condition 1 reached exit condition 2 reached supreg charge -hv start-up source on -series stabilizer on uvp supreg = no otp = yes uvp supic= yes boost charge -hv start-up source on -series stabilizer on -pfc on uvp boost = no & enable lc = yes scp boost = yes uvp supic = yes otp = yes uvp supreg = yes operational supply -series stabilizer on -pfc on -hbc on ovp output =yes protection timer passed * 1 -hv start-up source on -restart timer on scp boost = yes uvp supreg = yes uvp supic = yes otp = yes uvp boost = yes or enable ic = no start 014aaa851 enable pfc = no exit condition next state can be entered from any state when exit condition is true protection shutdown mains reset = yes restart restart time passed * 1 protection timer is activated by: -uvp output -olp hbc -ocr hbc -hfp SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 11 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.4 enable input (sshbc/en pin) the power supply applicat ion is disabled by pulling the sshbc/en pin low. figure 4 shows the internal functionality. when a voltage is present on the suphv pin or on the supic pin, a current i pu(en) =42 ? a flows from the sshbc/en pin. if the pin is not pulled down, the current increases the voltage up to v pu(en) = 3 v. since the voltage is above both v en(pfc)(en) = 1.2 v and v en(ic)(en) = 2.2 v, the ic is enabled. the ic is disabled when the sshbc/en pin voltage is pulled down under v en(pfc)(en) and v en(ic)(en) via an optocoupler driven from the hbc transformer secondary side (see figure 4 ). the pfc controller st ops switching immediatel y but the hbc controller continues switching until th e low-side stroke is active. it is also possible to control the voltage on the sshbc/en pin from another ci rcuit on the secondary side via a diode. the external pull-down current must be larger than the internal soft-start charge current i ss(hf)(sshbc) . if the voltage on sshbc/en is pulled under v en(ic)(en) , but not under v en(pfc)(en) , only the hbc is disabled. this feature is useful when another power converte r is connected to the pfc v boost . the low-side power switch of the hbc is on when the hbc is disabled using the sshbc/en pin. table 3. operating states state description no supply supply voltages on the supic and suphv pins are too low to provide any functionality. undervoltage protection (uvp supplies; see section 7.9 ) is active when v suphv a : :?a 7?< = 7?< = 95> a:a9 95>: 95>:8: SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 13 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.5.2 protection and restart timer the SSL4120 contains a programmable timer which can be used for timing several protection functions. the timer can be used in two ways: as a protection timer and as a restart timer. the timing of the timers is se t independently using the external resistor r prot and capacitor c prot connected to the rcprot pin. 7.5.2.1 protection timer certain error conditions are allowed to persist for a time period before protective action must be taken. the protection timer defines th e protection period (how long the error can persist before the protection function is trig gered). the protection functions that use the protection timer are found in the protection overview in section 7.9 . figure 5 shows the operation of the protection ti mer. when an error condition occurs, a fixed current i ch(slow)(rcprot) = 100 ? a flows from the rcprot pin and charges c prot . r prot causes the voltage to increase exponentiall y. the protection time elapses when the rcprot voltage reaches the upper switchin g level. when the protection time has elapsed, the appropriate protective action is taken and c prot is discharged. if the error condition is removed before the voltage on the rcprot pin reaches v u(rcprot) , c prot is discharged using r prot and no action is taken. the rcprot voltage can be forced > v u(rcprot) by an external circuit to trigger a restart. 7.5.2.2 restart timer the ic must be disabled for a time period on certain error conditions. particularly when the error condition can cause components to over heat. in such cases, the ic is disabled to allow the power supply to cool down. it automatically restarts. the restart timer determines the restart time. the restart timer is active in the restart state. the protection functions which trigger a restart are found in the protection func tions overview in section 7.9 . fig 5. operation of the protection timer passed 0 0 none present short error long error repetative error v u(rcprot) i ch(slow)(rcprot) i rcprot error v rcprot t protection time 014aaa853 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 14 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting figure 6 shows the operation of the restart timer. normally c prot is discharged to 0 v. when a restart is requested, c prot is quickly charged to the upper switching level v u(rcprot) . then the rcprot pin becomes high ohmic and c prot discharges through r prot . the restart time has elapsed when v rcprot reaches the lower switching level v l(rcprot) = 0.5 v. the ic restarts and c prot is discharged. 7.5.3 fast shut-down reset (snsmains pin) the latched protection shut-down state is reset when v supic and v suphv drop below their respective reset levels, v rst(supic) and v rst(suphv) . typically, the pfc boost capacitor c boost , must discharge before v supic and v suphv drop below their reset levels. discharging c boost can take a long time. fast shut-down reset causes a faster reset. when the mains supply is interrupted, the voltage on the snsmains pin falls. when v snsmains falls below v rst(snsmains) and then increases again by a hysteresis value, the ic leaves the protection shut-down state. the boost capacitor c boost does not require discharging to trigger a new start-up. the protection shutdown state is also exit ed by pulling down the enable input (the sshbc/en pin). 7.5.4 output overvoltage protection (snsout pin) the SSL4120 outputs are provided with overvoltage protection (ovp output; see section 7.9 ) . the output voltage is measured using the resonan t transformer auxiliary winding. the voltage is sensed on the snsout pin using an external rectifier and resistive divider. an overvoltage is de tected when the snsout voltage exceeds v ovp(snsout) . when an overvoltage is detected, the SSL4120 enters the protection shut-down state. additional external protection circuits, such as an external otp circuit, can be connected to this pin. connect them to the snsout pin using a diode to ensure that an error condition triggers an ovp event. fig 6. operation of the restart timer passed 0 no yes v u(rcprot) v l(rcprot) restart request 014aaa854 v rcprot t restart time SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 15 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.5.5 output undervoltage protection (snsout pin) if an error condition causes an output voltage drop when the SSL4120 is supplied from the hbc transformer auxiliary winding, a supic uvp event is automatically triggered. if an error condition causes a decrease in the output voltage when the ic is supplied from a separate dc source (for example, a standby supply), the ic does not automatically stop switching. to counter this, the ic outputs are provided with undervoltage protection (uvp output; see section 7.9 ). if v snsout SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 16 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.7 pfc controller the pfc controller converts the rectified un iversal mains voltage into an accurately regulated v boost of 400 v (dc) or 450 v (dc). it operates in quasi-resonant (qr) or discontinuous conduction mode (dcm) a nd is controlled using an on-time control system. the resulting mains harmonic current emissions of a typical application can meet the class-c mhr requirements for lighting applications. the pfc controller uses valley switching to mi nimize losses. a primary stroke is only started once the previous secondary stroke ends and the voltage across the pfc mosfet reaches a minimum value. 7.7.1 pfc gate driver (gatepfc pin) the circuit driving the gate of the power mosf et has a high current sourcing capability i source(gatepfc) of 500 ma. it also has a high current sink capability i sink(gatepfc) of 1.2 a. the source and sink capabilities enable fast power mosfet switch-on and switch-off to ensure efficient operation. the driver is supplied from the regulated supreg supply. 7.7.2 pfc on-time control the pfc operates under on-time control. the following determine the pfc mosfet on-time: ? the error amplifier and the loop compensation using the comppfc pin voltage ? at v ton(comppfc)zero = 3.5 v, the on-time is reduced to zero. ? at v ton(comppfc)max = 1.25 v, the on-time is at a maximum ? mains compensation using the snsmains pin voltage the on-time must be modulated with the mains voltage to reach the class-c mhr requirements. in the application, this is achi eved when a modulation current is injected into the comppfc network using a capacitor which connects to the mains voltage, see figure 19 . 7.7.2.1 pfc error amplifier (comppfc and snsboost pins) v boost is divided using a high-ohmic resistive divider. it is supplied to the snsboost pin. the transconductance error amplifier, whic h compares the snsboost voltage with an accurate trimmed reference voltage v reg(snsboost) , is connected to this pin. the external loop compensation network on the comppfc pin filters the output current. in a typical application, a resistor and two capacitors set the regulation loop bandwidth. the comppfc voltage is clamped at a maximum of v clamp(comppfc) . this clamp avoids a long recovery time if v boost rises above the regulation level for a period. 7.7.2.2 pfc mains compensation (snsmains pin) the mathematical equation for the transfer fu nction of a power factor corrector contains the square of the mains inpu t voltage. in a typical application, this results in a low bandwidth for low mains input voltages. at high mains input voltages, the mhr requirements are hard to meet. the SSL4120 contains a correction circuit to compensate for this effect. the average mains voltage is measured using the snsmains pin and this information is supplied to an internal compensation circuit. SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 17 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting figure 7 illustrates the relationship between v snsmains , v comppfc and the on-time. the compensation makes it is poss ible to keep the regulation loop bandwidth constant over the full mains input range. this feature provides a fast transient response on load steps, while still meeting the cla ss-c mhr requirements. 7.7.3 pfc demagnetization sensing (snsauxpfc pin) the voltage on the snsauxpfc pin is used to detect transfor mer demagnetization. during the secondary stroke, the transformer is magnetized and current flows in the boost output. during this time, v snsauxpfc SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 19 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.7.6 pfc soft-start and soft-stop (snscurpfc pin) the pfc controller features a soft-start fu nction. the function slowly increases the primary peak current during start-up. the soft-stop function slowly decreases the transformer peak current before operati ons are stopped. these functions prevent transformer rattle during start-up and burst mode operation. connecting a resistor r ss(pfc) and capacitor c ss(pfc) between the snscurpfc pin and the current sense resistor r cur(pfc) achieves this. during start-up, an internal current source i ch(ss)(pfc) charges the capacitor to v snscurpfc =i ch(ss)(pfc) ? r ss(pfc) . the voltage is limited to the maximum pfc soft-start clamp voltage, v clamp(ss)pfc . the additional voltage across the charged capacitor reduces the peak current. after start-up, the internal current source is switched-off, capacitor c ss(pfc) discharges across r ss(pfc) and the peak current increases. the start level and the time constant of the rising primary current can be adjusted externally by changing the values of r ss(pfc) and c ss(pfc) . switching on the internal current source i ch(ss)(pfc) starts a soft-stop. i ch(ss)(pfc) charges c ss(pfc) . the increasing capacitor voltage decreases the peak current. the charge current flows when the voltage on the snscurpfc pin is less than the maximum pfc soft-start voltage = 0.5 v. if v snscurpfc exceeds the maximum pfc soft-start voltage, the soft-start current source st arts limiting the charge current. to determine accurately if the capacitor is charged, the voltage is only measured during the pfc power switch off-time. the pfc is stopped when v snscurpfc > v stop(ss)(pfc) . 7.7.7 pfc overcurrent regulation, ocr-pfc (snscurpfc pin) the maximum peak current is limited cycle-by-c ycle by sensing the voltage across an external sense resistor (r cur(pfc) ) connected to the source of the external mosfet. the voltage is measured via the snscurpfc pin and is limited to v ocr(pfc) . a voltage peak appears on v snscurpfc when the pfc mosfet is switched on due to the discharging of the drain capacitanc e. the leading-edge blanking time t leb(pfc) ensures that the overcurrent sensing block does not react to this transitory peak. 7.7.8 pfc mains undervoltage protection/brownout protection, uvp mains (snsmains pin) the voltage on the snsmains pin is continuo usly sensed to prevent the pfc trying to operate at very low mains input vo ltages. pfc switching stops when v snsmains SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 21 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.8.3 hbc switch control hbc switch control determines when the mosfets switch on and off. it uses the output from several other blocks. ? a divider is used to alternate switching of the high and low-side mosfets for each oscillator cycle. the oscillator frequenc y is twice the half -bridge frequency. ? the controlled oscilla tor determines the switch-off point. ? adaptive non-overlap time sensing determin es the switch-on point. this function is the adaptive non-overlap time. ? several protection circuits and the state of the sshbc/en input pin specify if the resonant converter is a llowed to start switching. figure 9 provides an overview of typical switching behavior. 7.8.4 hbc adaptive non-overlap (ano) time function (hb pin) 7.8.4.1 inductive mode (normal operation) the high efficiency characteristic of a resona nt converter is the result of zero-voltage switching (zvs) of the power mosfets. zvs is also called soft switching. to allow soft switching, a small non-overlap time is re quired between the high-side on-times and low-side mosfets. during this non-overlap ti me, the primary resonant current charges or discharges the half-bridge capacitance between ground and v boost . after the charge or discharge cycles, the mosfet body diode starts conducting and because the voltage across the mosfet is ze ro, when the mosfet is switched on there are no switching losses. this operating mode is called inductive mode. in inductive mode, the switching frequency is above the resonan ce frequency and the resonant tank has an inductive impedance. fig 9. switching behavior of the hbc gatels gatehs hb i tr(hbc) cfmin t v boost 0 0 014aaa857 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 22 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting the hb transition time depends on the resona nt current amplitude when switching starts. there is a complex relationship between this amplitude, the frequency, v boost and the output voltage. ideally, the ic switches on the mosfet when the hb transition is complete. if it waits any longer, v hb can swing back, especially at high output loads. the advanced adaptive non-overlap time func tion controls the timing. the adaptive non-overlap time function makes it unnecessary to choose a fixed dead time (which is always a compromise). this saves on external components. adaptive non-overlap time sensing measures the hb slope after one mosfet has been switched off. norma lly, the hb slope starts immediately (t he voltage starts ri sing or falling). once the transition at the hb node is complete, the slope ends (the voltage stops rising/falling). this slope end is detected by the ano time sensor and the other mosfet is switched on. in this way, the non-overlap time is automatically optimized even when the hb transition cannot be completed which minimizes switching losses. figure 10 illustrates the adaptive non-overlap time function operation of the inductive mode. the non-overlap time depends on the hb slope but it has upper and lower limits. an integrated minimum non-overlap time, t no(min) prevents cross conduction occurring under any circumstances. the maximum non-overlap time is limited to the oscillator char ge time. if the hb slope is longer than the oscillator charge time ( 1 4 of hb switching period), the mosfet is forced to switch on. in this case, the mosfet is no t soft switching. this limitation ensures the mosfet on-time is at least 1 4 of the hb switching period at very high switching frequencies. 7.8.4.2 capacitive mode section 7.8.4.1 is true for normal operation with a switching frequency higher than the resonance frequency. when an error condition occurs (for example; output short, load pulse too high) the switching frequency is lower than the resonance frequency. the resonant tank then has a capacitive impeda nce. in capacitive mode, the hb slope does not start after the mosfet switches off. switching on the other mosfet is not recommended in this situation. the absence of soft switching increa ses dissipation in the fig 10. adaptive non-overlap time function (normal inductive operation) fast hb slope v boost hb gatels gatehs 0 slow hb slope incomplete hb slope t 014aaa858 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 23 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting mosfets. in capacitive mode, the body diode in the switched off mosfet can start conducting. switching on the other mosfet at this instant can result in the immediate destruction of the mosfets. the advanced adaptive non-overlap time of the SSL4120 always waits until the slope at the half-bridge node starts. it guarantees safe switching of the mosfets in all circumstances. figure 11 shows the adaptive non-overlap time function operation in capacitive mode. in capacitive mode, half the resonance peri od can elapse before the resonant current changes back to the correct polarity and starts charging the half-bridge node. the oscillator is slowed down until the half-bridge slope starts to allow this relatively long waiting time. see section 7.8.5 for more details on the oscillator. the mosfet is forced to switch on when th e half-bridge slope fails to start and the oscillator voltage reaches v u(cfmin) . the switching frequency is incr eased to eliminate the problems associated with capacitive mode operation (see section 7.8.11 ). 7.8.5 hbc slope controlled oscillator (cfmin and rfmax pins) the slope-controlle d oscillator dete rmines the half-bridge switching frequency. the oscillator generates a triang ular waveform between v u(cfmin) and v l(cfmin) at the external capacitor c fmin . figure 12 shows how the frequency is determined. fig 11. adaptive non-overlap time function (capacitive operation) v snsfb 0 i snsfb v pu(snsfb) i fmin(snsfb) v rfmax v rfmax 0 i fmax(snsfb) 0 v sshbc = 8.4 v i olp(snsfb) v olp(snsfb) v fmin(snsfb) v fmax(snsfb) v clamp(snsfb) v snsfb i clamp(snsfb) 014aaa862 v fmax(ss)(rfmax) v fmax(fb)(rfmax) SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 24 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting two external components determine the frequency range: ? capacitor c fmin connected between the cfmin pi n and ground sets the minimum frequency in combination with an internally trimmed current source i osc(min) . ? resistor r fmax connected between the rfmax pin and ground sets the frequency range and thus the maximum frequency. the oscillator frequency depend s on the charge and di scharge currents of c fmin . the charge and discharge current contains a fixed component, i osc(min) , which determines the minimum frequency. in addition, a variable co mponent that is 4.9 times greater than the current in the rfmax pin. the value of r fmax and the rfmax voltage pin determine i rfmax : ? the voltage on the rfmax pin is v fmin(rfmax) = 0 v at the minimum frequency. ? the voltage on the rfmax pin is v fmax(fb)(rfmax) = 1.5 v at the maximum feedback frequency. ? the voltage on the rfmax pin is v fmax(ss)(rfmax) = 2.5 v at the maximum soft-start frequency. the maximum freq uency of the oscillator is internally limited. the hb frequency is limited to f limit(hb) (minimum. 500 khz). figure 13 shows the relationship between v rfmax , r fmax , c fmin and f hb . fig 12. determination of frequency voltage pin sshbc polarity inversion (max 2.5 v) voltage pin rfmax conversion to current via r fmax feedback current pin snsfb fixed f min current conversion to voltage (max 1.5 v) (dis-)charge current pin cfmin conversion to frquency via c fmin 014aaa860 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 25 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting the half-bridge slope controls the oscillator. the osc illator charge current is initially set to a low value i osc(red) =30 ? a. when the start of the half -bridge slope is detected, the charge current is increased to its normal value. this feature is used in combination with the adaptive non-overlap time function as described in section 7.8.4.2 and figure 11 . the length of time the oscillator current is low is negligible under normal operating conditions because the half-bri dge slope normally starts directly after the mosfet is switched off. 7.8.6 hbc feedback input (snsfb pin) in a typical power supply application, the out put voltage is compared and amplified on the secondary side. the error amplifier output is transferred to the primary side using an optocoupler. this optocoupler can be connected directly to the snsfb pin. the snsfb pin supplies the optocoupler from an internal voltage source v pu(snsfb) = 8.4 v with the r o(snsfb) series resistance. the seri es resistance allows spike filtering using an external capacitor. to ensu re sufficient optocoupler bias current, the feedback input has a threshold current i fmin(snsfb) = 0.66 ma at which the frequency is at a minimum. the maximum frequency is reached at i fmax(snsfb) = 2.2 ma. the maximum frequency that can be reached using the snsfb pin is lower (60 %) than the maximum frequency that can be reached using the sshbc/en pin. figure 14 shows the relationship between i snsfb , v snsfb and v rfmax . a: c fmin =high, r fmax =high. b: c fmin =low, r fmax =low. c: c fmin = low, r fmax = too low. fig 13. function of r fmax and c fmin f limit(hb) f max(b) v fmax(fb)(rfmax) v fmax(ss)(rfmax) v rfmax a b c f max(a) f min(b and c) f min(a) 0 f hb 014aaa861 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 26 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting below the minimum frequency level, v snsfb is clamped at v clamp(snsfb) = 3.2 v. this clamp enables a fast recovery of the output voltage regulation loop after an overshoot of the output voltage. the maximum current the clamp can deliver is i clamp(snsfb) =7.3ma. 7.8.7 hbc open-loop protection, olp-hbc (snsfb pin) under normal operating conditions, the optocoupler current is between i fmin(snsfb) and i fmax(snsfb) and pulls down the voltage at the snsfb pin. due to an error in the feedback loop, the current could be less than i fmin(snsfb) with the hbc controller delivering maximum output power. the hbc controller features open-loop protec tion (olp-hbc) which monitors the snsfb pin voltage. when v snsfb >v olp(snsfb) , the protection timer is started. the restart state is activated if the olp condition is still pr esent after the protecti on time has elapsed. 7.8.8 hbc soft start (sshbc/en pin) the relationship between switching frequency and output current is not constant. it depends strongly on the output voltage v o and v boost . this relationship can be complex. the SSL4120 contains a soft-start function to ensure that the resonant converter starts or restarts with safe currents. this soft-start function forces a start at such a high frequency that the currents are acceptable under all cond itions. the soft-start then slowly decreases the frequency. normally, output voltage regul ation takes over frequency control before soft-start reaches its minimum frequency. limi ting the output current during start-up also limits the rate at which the output voltage rises and prevents an overshoot. soft-start utilizes the sshbc/en pin voltage. the external capacitor c ss(hbc) sets the timing of the soft-start. the sshbc/en pin is also used as an enable input. soft-start voltage levels are above the enable voltage thresholds. fig 14. transfer function of feedback input v snsfb 0 i snsfb v pu(snsfb) i fmin(snsfb) v rfmax v rfmax 0 i fmax(snsfb) 0 v sshbc = 8.4 v i olp(snsfb) v olp(snsfb) v fmin(snsfb) v fmax(snsfb) v clamp(snsfb) v snsfb i clamp(snsfb) 014aaa862 v fmax(ss)(rfmax) v fmax(fb)(rfmax) SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 27 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.8.8.1 soft-start voltage levels the relationship between the soft-start vo ltage at the sshbc/en pin and the rfmax pin voltage is shown in figure 15 . the relationship is direct ly related to the frequency. v rfmax and v sshbc/en are of opposite polarity. v sshbc/en SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 29 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.8.9 hbc high-frequency protection, hfp-hbc (rfmax pin) normally the converter does not operate c ontinuously at maximum frequency because it sweeps down to much lower values. certain error conditions, such as a disconnected transformer, could cause the converter to operate continuously at maximum frequency. if zero-voltage switching conditions are no lo nger present, the mosfets can overheat. the SSL4120 features high-frequency protection (hfp) for the hbc controller to protect it from being damaged in such circumstances. hfp senses the rfmax pin voltage. this voltage indicates the current frequency. when the frequency is higher than 75 % of the soft-s tart frequency range, the protection timer is started. the 75 % level corresponds to an rfmax voltage of v hfp(rfmax) =1.83v. 7.8.10 hbc overcurrent regulation and protection, ocr and ocp (snscurhbc pin) the hbc controller is protected a gainst overcurrent in two ways: ? overcurrent regulation (ocr-hbc) which increases the frequency slowly. the protection timer is also started. ? overcurrent protection (ocp-hbc) which steps to maximum frequency. a v boost compensation function is used to reduce the variation in the output current protection level. 7.8.10.1 boost voltage compensation the primary current, also known as the resonant current, is sensed using the snscurhbc pin. it senses the momentary vo ltage across an external current sense resistor r cur(hbc) . the use of the momentary current signal allows fast overcurrent protection and simplifies the stabilizing of overcurrent regulati on. the ocr and ocp comparators compare v snscurhbc with the maximum positi ve and negative values. the primary current is higher when v boost is low for the same output power. boost compensation is included to reduce the depen dency of the protected output current level on v boost . the boost compensation sources and sinks a current from the snscurhbc pin. this current creates a voltage drop across the series resistor r curcmp . the amplitude of the current is linearly dependent on v boost . at v boost(nom) , the current is zero and the voltage v cur(hbc) across the current sense resistor is also present on the snscurhbc pin. at the uvp boost start level v uvp(snsboost) , the current is at a ma ximum. the current sink or source direction depends on the active gate signal. the voltage drop created across r curcmp reduces the amplitude at the pin. this r eduction in amplitude results in a higher effective current protection level. the r curcmp value sets the amount of compensation. figure 17 shows how the boost compensation works for an artificial current signal. the sinking compensation curr ent only flows when v snscurhbc is positive because of the circuit implementation. SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 30 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 7.8.10.2 overcurrent regulation, ocr-hbc the lowest comparator levels at the snscurhbc pin (v ocr(hbc) = ? 0.5 v and +0.5 v), relate to the overcurrent regulation voltage. there are comparators for both the positive and negative polarities. the positive comparator is active during the high-side on-time and the following high-side to low- side non-overlap time. the negative comparator is active during the remaining time. if either level is exceeded, the frequency is slowly increased. discharging the soft-start capacitor achieves this decrease. each time the ocr level is exceeded, the even t is latched until the next stroke and the soft-start discharge current is enabled. when both the positive and negative ocr levels are exceeded, the soft-start discharge current flows continuously. overcurrent regulation is very effective at limiting the output current during start-up. a smaller soft-start capacitor is used to achiev e a faster start-up. using a smaller capacitor can result in an output curren t that is too high at times. however, the ocr function slows down the frequency sweep when required to keep the output current within the specified limits. figure 18 shows the operation of the ocr during output voltage start-up. fig 17. boost voltage compensation v cur(hbc) = r cur(hbc) i cur(hbc) i ocr(high) i ocp(high) i ocp(nom) i ocr(nom) -i ocr(nom) -i ocp(nom) -i ocr(high) -i ocp(high) i cur(hbc) i snscurhbc v reg v uvp v boost gatels gatehs sink current only with positive v snscurhbc sink source 0 0 0 t t t t low v boost strong compensation high ocp low v boost strong compensation high ocr nominal v boost no compensation nominal ocp nominal v boost no compensation nominal ocr v snscurhbc t t 014aaa865 v snscurhbc v ocr(hbc) -v ocr(hbc) v ocp(hbc) -v ocp(hbc) SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 31 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting the protection timer is also started. the re start state is activated when the ocr-hbc condition is still present after th e protection time has elapsed. 7.8.10.3 overcurrent protection, ocp-hbc under normal operating conditions, ocr is ab le to ensure the current remains below the specified maximum values. however, in the event of certain error conditions, it is not fast enough to limit the current. ocp is implemented to protect against those error conditions. the ocp level (v ocp(hbc) = ? 1 v and +1 v), is higher than the ocr level v ocr(hbc) . when the ocp level is reached, the frequency immediately jumps to the maximum value using the soft-start reset, then a normal sweep down. 7.8.11 hbc capacitive mode regulation, cmr (hb pin) the mosfets in the half-bridge drive the resonant circuit. depending on the output load, the output voltage and the switching frequency th is resonant circuit can have an inductive or a capacitive impedance. indu ctive impedance is preferred beca use it facilitates efficient zero-voltage switching. harmful switching in capacitive mode is av oided using the adaptive non-overlap time function (see section 7.8.4.2 ). an extra action is performed which results in capacitive mode regulation (cmr). cmr causes the half -bridge circuit to return to inductive mode from capacitive mode. fig 18. overcurrent regulation during start-up i ocr -i ocr i cur(hbc) i ss(hf)(sshbc) i ss(if)(sshbc) -i ss(if)(sshbc) -i ss(hf)(sshbc) i sshbc/en v sshbc/en v fmin(sshbc) v ss(hf-lf)(sshbc) v fmax(sshbc) v o v reg 0 0 0 t t t t fast soft start sweep (charge and discharge) slow soft start sweep (charge and discharge) 014aaa866 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 32 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting capacitive mode is detected when the hb slope does not start within t to(cmr) after the mosfets have switched off. detection of ca pacitive mode increases the switching frequency. this increase is caused by dischargi ng the soft-start capacitor with a relatively high current i cmr(hf)(sshbc) immediately after t to(cmr) expires until the half-bridge slope starts. the frequency increase regulates the hbc to the border between capacitive and inductive mode. 7.9 protection functions overview table 4. overview protections protected part symbol protection affected action description ic uvp-supic undervoltage protection supic ic disable section 7.2.1 ic uvp-supreg undervoltage protection supreg ic disable section 7.2.2 ic uvp-supplies undervoltage protection supplies ic disable and reset section 7.3 ic scp-supic short circuit protection supic ic low hv start-up current section 7.2.4 ic ovp output overvoltage protection output ic shutdown section 7.5.4 ic uvp output undervoltage protection output ic restart after protection time section 7.5.5 ic otp overtemperature protection ic disable section 7.5.6 pfc ocr-pfc overcurrent regulation pfc pfc switch off cycle-by-cycle section 7.7.7 pfc uvp mains undervoltage protection mains pfc suspend switching section 7.7.8 pfc ovp boost overvoltage protection boost pfc suspend switching section 7.7.9 pfc scp boost short circuit protection boost ic restart section 7.7.10 pfc olp-pfc open-loop protection pfc ic restart section 7.7.10 hbc uvp boost undervoltage protection boost hbc disable section 7.8.2 hbc olp-hbc open-loop protection hbc i c restart after protection time section 7.8.7 hbc hfp-hbc high-frequency protection hb c ic restart after protection time section 7.8.9 hbc ocr-hbc overcurrent regulation hbc hbc ic increase frequency restart after protection time section 7.8.10.2 hbc ocp-hbc overcurrent protection hbc hbc step to maximum frequency section 7.8.10.3 hbc cmr capacitive mode regulation hbc increase frequency section 7.8.11 hbc ano adaptive non-overlap hbc prevent hazardous switching section 7.8.4 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 33 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 8. limiting values table 5. limiting values in accordance with the absolute maximum rating system (iec 60134). all voltages are measured with respect to pin sgnd; currents are positive when flowing into the ic; the voltage ra tings are valid provided other ratings are not violated; current ratings are valid provided the maximum power rating is not violated. symbol parameter conditions min max unit voltages v suphv voltage on pin suphv continuous ? 0.4 +630 v v suphs voltage on pin suphs dc ? 0.4 +570 v t<0.5s ? 0.4 +630 v referenced to the hb pin ? 0.4 +14 v v supic voltage on pin supic ? 0.4 +38 v v snsauxpfc voltage on pin snsauxpfc ? 25 +25 v v supreg voltage on pin supreg ? 0.4 +12 v v snsout voltage on pin snsout ? 0.4 +12 v v rcprot voltage on pin rcprot ? 0.4 +12 v v snsfb voltage on pin snsfb ? 0.4 +12 v v sshbc/en voltage on pin sshbc/en ? 0.4 +12 v v gatehs voltage on pin gatehs t < 10 s for i > 10 ma ? 0.4 v suphs +0.4 v v gatels voltage on pin gatels t < 10 s for i > 10 ma ? 0.4 v supreg +0.4 v v gatepfc voltage on pin gatepfc t < 10 s for i > 10 ma ? 0.4 v supreg +0.4 v v snscurhbc voltage on pin snscurhbc ? 5+5 v v snsboost voltage on pin snsboost ? 0.4 +5 v v snsmains voltage on pin snsmains ? 0.4 +5 v v snscurpfc voltage on pin snscurpfc current limited ? 0.4 +5 v v comppfc voltage on pin comppfc ? 0.4 +5 v v cfmin voltage on pin cfmin ? 0.4 +5 v v pgnd voltage on pin pgnd ? 1+1 v currents i gatepfc current into pin gatepfc duty cycle < 10 % ? 0.8 +2 a i snscurpfc current into pin snscurpfc ? 1+10 ma general p tot total power dissipation t amb < 75 ?c- 0 . 8w t stg storage temperature ? 55 +150 ?c t j junction temperature ? 40 +150 ?c SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 34 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting [1] equivalent to discharging a 100 pf capacitor through a 1.5 k ? series resistor. [2] equivalent to discharging a 200 pf capacitor through a 0.75 ? h coil and a 10 ? resistor. 9. thermal characteristics 10. characteristics esd v esd electrostatic discharge voltage human body model pin 12 (suphv) [1] -1.5 kv pin 13,14,15 (hs driver) [1] -1 kv other pins [1] -2 kv machine model all pins [2] - 200 v charged device model all pins - 500 v table 5. limiting values ?continued in accordance with the absolute maximum rating system (iec 60134). all voltages are measured with respect to pin sgnd; currents are positive when flowing into the ic; the voltage ra tings are valid provided other ratings are not violated; current ratings are valid provided the maximum power rating is not violated. symbol parameter conditions min max unit table 6. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient in free air; jedec single layer test board 90 k/w table 7. characteristics t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit high-voltage start-up source (suphv pin) i dism(suphv) disable mode current on pin suphv disabled ic state - 150 - ? a i red(suphv) reduced current on pin suphv v supic SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 36 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting output voltage protection sensing, uvp/ovp output (snsout pin) v ovp(snsout) overvoltage protection voltage on pin snsout [2] 3.4 3.5 3.6 v v uvp(snsout) under-voltage protection voltage on pin snsout [2] 2.2 2.35 2.5 v overtemperature protection t otp overtemperature protection trip temperature [2] 130 150 160 ?c burst mode activation (snsout pin) v burst(hbc) hbc burst mode voltage [2] 0.9 1.1 1.2 v v burst(pfc) pfc burst mode voltage [2] 0.3 0.4 0.5 v i pu(snsout) pull-up current on pin snsout - ? 100 ? 80 ? a v pu(snsout) pull-up voltage on pin snsout r snsout =25k ? to sgnd - 1.5 - v pfc driver (gatepfc pin) i source(gatepfc) source current on pin gatepfc v gatepfc =2v - ? 0.5 a i sink(gatepfc) sink current on pin gatepfc v gatepfc =2v - 0.7 - a v gatepfc =10v - 1.2 - a pfc on-timer (comppfc pin) v ton(comppfc)zero zero on-time voltage on pin comppfc -3.5-v v ton(comppfc)max maximum on-time voltage on pin comppfc -1.25-v f max(pfc) pfc maximum frequency 300 380 460 khz t off(pfc)min minimum pfc off-time - 1.1 - ? s pfc error amplifier (sns boost and comppfc pins) v reg(snsboost) regulation voltage on pin snsboost pin i comppfc = 0 a 2.475 2.5 2.525 v g m transconductance v snsboost to i comppfc -80- ? a/v i sink(comppfc) sink current on pin comppfc v snsboost =2v - 39 - ? a i source(comppfc) source current on pin comppfc v snsboost =3.3v - ? 39 - ? a v clamp(comppfc) clamp voltage on pin comppfc [3] -3.9-v pfc mains compensation (snsmains pin) t on(max) maximum on-time high mains; v snsmains =3.3v 3.5 4.7 5.9 ? s low mains; v snsmains =0.97v 29 44 59 ? s v mvc(snsmains)max maximum mains voltage compensation voltage on pin snsmains 4- - v table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 37 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting pfc demagnetization sensing (snsauxpfc pin) v demag(snsauxpfc) demagnetization voltage on pin snsauxpfc ? 150 ? 100 ? 50 mv t to(mag) magnetization time-out time 40 50 60 ? s i prot(snsauxpfc) protection current on pin snsauxpfc v snsauxpfc =50mv ? 75 ? 33 - na pfc valley sensing (snsauxpfc pin) (dv/dt) vrec(min) minimum valley reco gnition rate of voltage change -- 1.7v/ ? s t slope(vrec)min minimum valley recognition slope time v snsauxpfc =1v pp [4] - - 300 ns demagnetization to ? v/ ? t=0 [5] -- 50ns t d(val-dem)max maximum valley-to-demag delay time - 200 - ns t to(vrec) valley recognition time-out time 3 4 6 ? s pfc soft start (snscurpfc pin) i ch(ss)(pfc) pfc soft-start charge current - ? 60 - ? a v clamp(ss)(pfc) pfc soft-start clamp voltage [1] 0.46 0.5 0.54 v v stop(ss)(pfc) pfc soft-start stop voltage [1] -0.45-v r ss(pfc) pfc soft-start resistor 12 - - k ? pfc overcurrent sensing (snscurpfc pin) v ocr(pfc) pfc overcurrent regulation voltage dv/dt = 50 mv/ ? s 0.49 0.52 0.55 v dv/dt = 200 mv/ ? s 0.51 0.54 0.57 v t leb(pfc) leading edge blanking time 250 310 370 ns i prot(snscurpfc) protection current on pin snscurpfc ? 50 ? 33 - na pfc mains voltage sensing and clamp (snsmains pin) v start(snsmains) start voltage on pin snsmains [1] 1.11 1.15 1.19 v v uvp(snsmains) undervoltage protection voltage on pin snsmains [1] 0.84 0.89 0.94 v v pu(snsmains) pull-up voltage on pin snsmains uvp mains active [1] -1.05-v i pu(snsmains) maximum clamp current uvp mains active - ? 42 ? 35 ? a i prot(snsmains) protection current on pin snsmains v snsmains >v uvp(snsmains) - 33 100 na pfc boost voltage protection sensing, scp/uvp/ovp boost (snsboost pin) v scp(snsboost) short-circuit protection voltage on pin snsboost 0.35 0.4 0.45 v v start(snsboost) start voltage on pin snsboost - 2.3 2.4 v v uvp(snsboost) undervoltage protection voltage on pin snsboost 1.5 1.6 - v v ovp(snsboost) overvoltage protection voltage on pin snsboost 2.59 2.63 2.67 v table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 38 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting i prot(snsboost) protection current on pin snsboost v snsboost = 2.5 v - 45 100 na hbc high-side and low-side driver (gatehs and gatels pins) i source(gatehs) source current on pin gatehs v gatehs ? v hb =4v - ? 310 - ma i source(gatels) source current on pin gatels v gatels ? v pgnd =4v - ? 310 - ma i sink(gatehs) sink current on pin gatehs v gatehs ? v hb = 2 v; - 560 - ma v gatehs ? v hb =11v - 1.9 - a i sink(gatels) sink current on pin gatels v gatels ? v pgnd = 2 v - 560 - ma v gatels ? v pgnd =11v - 1.9 - a v rst(suphs) reset voltage on pin suphs - 4.5 - v i q(suphs) quiescent current on pin suphs v suphs ? v hb =11v - 37 - ? a hbc adaptive non-overlap time (hb pin) (dv/dt) ano(min) minimum adaptive non-overlap time rate of voltage change - - 120 v/ ? s t no(min) minimum non-overlap time - - 160 ns hbc current controlled oscillator (cfmin and rfmax pin) f min(hb) minimum frequency on pin hb c fmin =390pf; v sshbc/en >v fmin(sshbc) v snsfb > v fmin(snsfb) 40 44 48 khz i osc(min) minimum oscillator current v rfmax = 0 v; charge and discharge - 150 - ? a i osc(max) maximum oscillator current r fmax =15k ? ; v rfmax =2.5 v; v sshbc/en SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 39 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting v fmin(snsfb) minimum frequency voltage on pin snsfb 6.1 6.4 6.9 v i fmin(snsfb) minimum frequency current on pin snsfb v sshbc/en > v fmin(sshbc) ? 0.86 ? 0.66 ? 0.46 ma v fmax(snsfb) maximum frequency voltage on pin snsfb v sshbc/en > v fmin(sshbc) 3.9 4.1 4.3 v i fmax(snsfb) maximum frequency current on pin snsfb v sshbc/en > v fmin(sshbc) - ? 2.2 - ma v clamp(snsfb) clamp voltage on pin snsfb maximum frequency; i snsfb = ? 4ma -3.2-v i clamp(snsfb) clamp current on pin snsfb maximum frequency; v snsfb =0v - ? 7.3 - ma hbc soft-start (sshbc/en pin) v fmax(sshbc) maximum frequency voltage on pin sshbc -3.2-v v fmin(sshbc) minimum frequency voltage on pin sshbc v snsfb > v fmin(snsfb) 7.5 7.9 8.3 v v clamp(sshbc) clamp voltage on pin sshbc - 8.4 - v v ss(hf-lf)(sshbc) high-low frequency soft-start voltage on pin sshbc [2] -5.6-v i ss(hf)(sshbc) high frequency soft-start current on pin sshbc v sshbc < v ss(lf-hf)(sshbc) charge current - ? 160 - ? a discharge current - 160 - ? a i ss(lf)(sshbc) low frequency soft-start current on pin sshbc v sshbc > v ss(lf-hf)(sshbc) charge current - ? 40 - ? a discharge current - 40 - ? a i cmr(hf)(sshbc) high frequency cmr current on pin sshbc v sshbc < v ss(lf-hf)(sshbc) discharge only - 1800 - ? a i cmr(lf)(sshbc) low frequency cmr current on pin sshbc v sshbc > v ss(lf-hf)(sshbc) discharge only - 440 - ? a hbc high frequency sensing, hfp - hbc (rfmax pin) v hfp(rfmax) high-frequency protection voltage on pin rfmax [2] 1.7 1.83 2 v hbc overcurrent sensing, ocr/ocp - hbc (snscurhbc pin) v ocr(hbc) hbc overcurrent regulation voltage positive level; hs on + hs-ls non-overlap time 0.45 0.5 0.55 v negative level; ls on + ls-hs non-overlap time ? 0.55 ? 0.5 ? 0.45 v table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 40 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting [1] the marked levels on this pin are correlated. the voltage diff erence between the levels has much less spread than the absolu te value of the levels themselves. [2] switching level has some hysteresis. t he hysteresis falls within the limits. [3] for a typical application with a compensation network on the co mppfc pin, as the example in figure 19 . [4] minimum required voltage change time fo r valley recognition on the snsauxpfc pin. [5] minimum time required between demagnetization detection and ? v/ ? t = 0 on the snsauxpfc pin. v ocp(hbc) hbc overcurrent protection voltage positive level; hs on + hs-ls non-overlap time 0.9 1 1.1 v negative level; ls on + ls-hs non-overlap time ? 1.1 ? 1 ? 0.9 v i bstc(snscurhbc)max maximum boost compensation current on pin snscurhbc v snsboost =1.8v source current; v snscurhbc = ? 0.5 v - ? 170 - ? a sink current; v snscurhbc =0.5v - 170 - ? a hbc capacitive mode protection (cmp) (hb pin) t to(cmr) time-out capacitive mode regulation - 690 - ns table 7. characteristics ?continued t amb =25 ? c; v supic =20v; v suphv > 40 v; all voltages are measured with respec t to sgnd; currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 41 of 48 nxp semiconductors SSL4120 resonant power supply controlle r ic with pfc for led lighting 11. application information fig 19. application diagram of SSL4120 659 :a >a < = " ?a7?a " < = # !0 59< = ! ! !0 # !0 ! ! " " ! 5> SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 42 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 12. package outline fig 20. package outline sot137 (so24) unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z ywv references outline version european projection issue date iec jedec jeita mm inches 2.65 0.3 0.1 2.45 2.25 0.49 0.36 0.32 0.23 15.6 15.2 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.1 0.4 sot137-1 x 12 24 w m a a 1 a 2 b p d h e l p q detail x e z c l v m a 13 (a ) 3 a y 0.25 075e05 ms-013 pin 1 index 0.1 0.012 0.004 0.096 0.089 0.019 0.014 0.013 0.009 0.61 0.60 0.30 0.29 0.05 1.4 0.055 0.419 0.394 0.043 0.039 0.035 0.016 0.01 0.25 0.01 0.004 0.043 0.016 0.01 e 1 0 5 10 mm scale so24: plastic small outline package; 24 leads; body width 7.5 mm sot137-1 99-12-27 03-02-19 SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 43 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 13. abbreviations table 8. abbreviations acronym description ano adaptive non-overlap cmos complementary metal-oxide-semiconductor' cmp capacitive mode protection cmr capacitive mode regulation dmos double-diffused metal-oxide-semiconductor emi electromagnetic interference hbc half-bridge converter or controller. resonant converter which generates the regulated output voltage. hfp high-frequency protection hv high-voltage ocp overcurrent protection ocr overcurrent regulation olp open-loop protection otp overtemperatu re protection ovp overvoltage protection pfc power factor converter or controller. converter which performs the power factor correction. uvp undervoltage protection scp short-circuit protection SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 44 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 14. revision history table 9. revision history document id release date data sheet status change notice supersedes SSL4120 v.2 20121101 product data sheet - SSL4120t v.1 SSL4120t v.1 20120621 objective data sheet - - SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 45 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 15. legal information 15.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nxp.com . 15.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nxp semiconductors sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. product specification ? the information and data provided in a product data sheet shall define the specification of the product as agreed between nxp semiconductors and its customer , unless nxp semiconductors and customer have explicitly agreed otherwis e in writing. in no event however, shall an agreement be valid in which the nxp semiconductors product is deemed to offer functions and qualities beyond those described in the product data sheet. 15.3 disclaimers limited warranty and liability ? information in this document is believed to be accurate and reliable. however, nxp semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such info rmation. nxp semiconductors takes no responsibility for the content in this document if provided by an information source outside of nxp semiconductors. in no event shall nxp semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. notwithstanding any damages that customer might incur for any reason whatsoever, nxp semiconductors? aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the terms and conditions of commercial sale of nxp semiconductors. right to make changes ? nxp semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use ? nxp semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an nxp semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nxp semiconductors and its suppliers accept no liability for inclusion and/or use of nxp semiconducto rs products in such equipment or applications and therefore such inclusion and/or use is at the customer?s own risk. applications ? applications that are described herein for any of these products are for illustrative purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers are responsible for the design and operation of their applications and products using nxp semiconductors products, and nxp semiconductors accepts no liability for any assistance with applications or customer product design. it is customer?s sole responsibility to determine whether the nxp semiconductors product is suitable and fit for the customer?s applications and products planned, as well as fo r the planned application and use of customer?s third party customer(s). customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. nxp semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer?s applications or products, or the application or use by customer?s third party customer(s). customer is responsible for doing all necessary testing for the customer?s applic ations and products using nxp semiconductors products in order to av oid a default of the applications and the products or of the application or use by customer?s third party customer(s). nxp does not accept any liability in this respect. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) will cause permanent damage to the device. limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the recommended operating conditions section (if present) or the characteristics sections of this document is not warranted. constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. terms and conditions of commercial sale ? nxp semiconductors products are sold subject to the gener al terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms , unless otherwise agreed in a valid written individual agreement. in case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. nxp semiconductors hereby expressly objects to applying the customer?s general terms and conditions with regard to the purchase of nxp semiconducto rs products by customer. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification. SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 46 of 48 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting export control ? this document as well as the item(s) described herein may be subject to export control regu lations. export might require a prior authorization from competent authorities. non-automotive qualified products ? unless this data sheet expressly states that this specific nxp semicon ductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nxp semiconductors? warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors? specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nxp semiconductors? standard warranty and nxp semiconduct ors? product specifications. translations ? a non-english (translated) version of a document is for reference only. the english version shall prevail in case of any discrepancy between the translated and english versions. 15.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. 16. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com SSL4120 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 1 november 2012 47 of 48 continued >> nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting 17. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 2 2.1 general features . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 pfc controller features. . . . . . . . . . . . . . . . . . . 2 2.3 hbc controller features . . . . . . . . . . . . . . . . . . 2 2.4 protection features . . . . . . . . . . . . . . . . . . . . . . 2 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 ordering information . . . . . . . . . . . . . . . . . . . . . 3 5 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 6.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 functional description . . . . . . . . . . . . . . . . . . . 6 7.1 overview of ic modules . . . . . . . . . . . . . . . . . . 6 7.2 power supply . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.2.1 low-voltage supply input (supic pin) . . . . . . . 7 7.2.2 regulated supply (supreg pin) . . . . . . . . . . . 8 7.2.3 high-side driver floating supply (suphs pin) . . 9 7.2.4 high-voltage supply input (suphv pin) . . . . . . 9 7.3 flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.4 enable input (sshbc/en pin) . . . . . . . . . . . . 11 7.5 ic protection . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7.5.1 ic restart and shut-down . . . . . . . . . . . . . . . . 12 7.5.2 protection and restart timer . . . . . . . . . . . . . . 13 7.5.2.1 protection timer . . . . . . . . . . . . . . . . . . . . . . . 13 7.5.2.2 restart timer . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7.5.3 fast shut-down reset (snsmains pin) . . . . . 14 7.5.4 output overvoltage protection (snsout pin) 14 7.5.5 output undervoltage pr otection (snsout pin) 15 7.5.6 overtemperature protecti on (otp) . . . . . . . . 15 7.6 burst mode operation (snsout pin) . . . . . . . 15 7.7 pfc controller. . . . . . . . . . . . . . . . . . . . . . . . . 16 7.7.1 pfc gate driver (gatepfc pin). . . . . . . . . . . 16 7.7.2 pfc on-time control . . . . . . . . . . . . . . . . . . . . 16 7.7.2.1 pfc error amplifier (comppfc and snsboost pins) . . . . . . . . . . . . . . . . . . . . . . 16 7.7.2.2 pfc mains compensation (snsmains pin). . 16 7.7.3 pfc demagnetization sensing (snsauxpfc pin) . . . . . . . . . . . . . . . . . . . . . 17 7.7.4 pfc valley sensing (snsauxpfc pin) . . . . . 17 7.7.5 pfc frequency and off-time limiting . . . . . . . . 18 7.7.6 pfc soft-start and soft-stop (snscurpfc pin) . . . . . . . . . . . . . . . . . . . . . 19 7.7.7 pfc overcurrent regulation, ocr-pfc (snscurpfc pin) . . . . . . . . . . . . . . . . . . . . . 19 7.7.8 pfc mains undervoltage protection/brownout protection, uvp mains (snsmains pin) . . . . 19 7.7.9 pfc boost overvoltage protection, ovp boost (snsboost pin) . . . . . . . . . . . . . . . . . 20 7.7.10 pfc short circuit/open-loop protection, scp/olp-pfc (snsboost pin) . . . . . . . . . 20 7.8 hbc controller . . . . . . . . . . . . . . . . . . . . . . . . 20 7.8.1 hbc high-side and low-side driver (gatehs and gatels pins). . . . . . . . . . . . . 20 7.8.2 hbc boost undervoltage protection, uvp boost (snsboost pin) . . . . . . . . . . . . . . . . . 20 7.8.3 hbc switch control. . . . . . . . . . . . . . . . . . . . . 21 7.8.4 hbc adaptive non-overlap (ano) time function (hb pin) . . . . . . . . . . . . . . . . . . . . . . 21 7.8.4.1 inductive mode (normal operation) . . . . . . . . 21 7.8.4.2 capacitive mode . . . . . . . . . . . . . . . . . . . . . . 22 7.8.5 hbc slope controlled oscillator (cfmin and rfmax pins) . . . . . . . . . . . . . . . . . . . . . . . . . 23 7.8.6 hbc feedback input (snsfb pin) . . . . . . . . . 25 7.8.7 hbc open-loop protection, olp-hbc (snsfb pin). . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.8.8 hbc soft start (sshbc/en pin) . . . . . . . . . . . 26 7.8.8.1 soft-start voltage levels . . . . . . . . . . . . . . . . . 27 7.8.8.2 soft-start charge and discharge . . . . . . . . . . . 27 7.8.8.3 soft-start reset . . . . . . . . . . . . . . . . . . . . . . . . 28 7.8.9 hbc high-frequency protection, hfp-hbc (rfmax pin) . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.8.10 hbc overcurrent regulation and protection, ocr and ocp (snscurhbc pin) . . . . . . . . 29 7.8.10.1 boost voltage compensation . . . . . . . . . . . . . 29 7.8.10.2 overcurrent regulation, ocr-hbc . . . . . . . . 30 7.8.10.3 overcurrent protection, ocp-hbc. . . . . . . . . 31 7.8.11 hbc capacitive mode regulation, cmr (hb pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.9 protection functions overview . . . . . . . . . . . . 32 8 limiting values . . . . . . . . . . . . . . . . . . . . . . . . 33 9 thermal characteristics . . . . . . . . . . . . . . . . . 34 10 characteristics . . . . . . . . . . . . . . . . . . . . . . . . 34 11 application information . . . . . . . . . . . . . . . . . 41 12 package outline. . . . . . . . . . . . . . . . . . . . . . . . 42 13 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 43 14 revision history . . . . . . . . . . . . . . . . . . . . . . . 44 15 legal information . . . . . . . . . . . . . . . . . . . . . . 45 15.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 45 15.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 15.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 45 15.4 trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 46 16 contact information . . . . . . . . . . . . . . . . . . . . 46 nxp semiconductors SSL4120 resonant power supply controller ic with pfc for led lighting ? nxp b.v. 2012. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 1 november 2012 document identifier: SSL4120 please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 17 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 |
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