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MP4603 white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 1 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 the future of analog ic technology description the MP4603 is an integrated white led driver. it uses mps?s patent-pending technology to drive the backlights for lcd tvs measuring 60- inches or larger, for led string voltages up to 350v. this novel technology can leverage the led drive power by regulating only a small portion of the led drive voltage?together with a fixed high-voltage source, a low-voltage led driver can drive high voltage led strings. this method allows for a super-high power density, higher efficiency and lower cost due to the low voltage stress, higher switching frequencies, and smaller passive components. the MP4603 is a current-mode?controlled buck-boost regulator. with a 12v input v inl and a high voltage source v inh , it can deliver a regulated voltage (v inh to v inh +68v) to drive a led string with up to 100 leds. it can drive an external switch in series with the led string to achieve over 1:1000 dimming ratio. analog dimming can be applied at the same time to further improve the dimming ratio. fault protections include led open-string protection, output short-circuit protection, cycle-by-cycle peak current limiting, and thermal shutdown. the MP4603 is available in tssop16-ep and soic16 packages. features ? novel power-leverage-control technology ? unique step-up/down operation ? up to 99.5% efficiency ? 0.5 ? internal power mosfet ? switching frequency synchronization ? over 1:1000 dimming ratio ? separate analog and pwm dimming ? 5% 200mv reference voltage ? 10 a shutdown mode ? cycle-by-cycle over-current protection ? thermal shutdown protection ? led string open and short protection ? fault output at led protection ? output short-circuit protection ? available in tssop16-ep and soic16 packages applications ? large lcd panels backlighting ? high power street led lighting a ll mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc.
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 2 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 typical application fault bst vin ingnd syn pwm en adim fst sw vss dgd ovp fb comp slope fault vin c in clk/syn pwm en adim 300k r fault r fst r slope 300k c comp 10n 100k c bst 100n l1 c out r2 r1 r fb v inh MP4603
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 3 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 ordering information part number package top marking free air temperature (t a ) MP4603es* soic16 MP4603es -20c to +85c MP4603ef** tssop16-ep MP4603ef * for tape & reel, add suffix ?z (e.g. MP4603es?z); for rohs compliant packaging, add suffix ?lf (e.g. MP4603es?lf?z) ** contact factory for availability of tssop16-ep package reference absolute maxi mum ratings (1) v vin ? v ss ........................................ -0.3v to 85v v ingnd ? v ss ..................................... -0.3v to 85v v sw ? v ss .............................. -0.3v to v in + 0.3v v bst ...................................................... v sw + 6v v dgd ? v ss ..................................... -0.3v to +12v v vin ? v ocp ...................................... -0.3v to +6v v ovp , v fb , v com , v fst ? v ss ............. -0.3v to +6v v adim , v en, v pwm , v syn ? v ingnd ......... -0.3v to +6v continuous power dissipation (t a = +25c) (2) tssop16-ep ............................................. 2.7w soic16 ...................................................... 1.6w junction temperature ............................... 150c lead temperature .................................... 260c storage temperature ............... -65c to +150c recommended operating conditions (3) supply voltage v vin ? v ss ................... 5v to 80v v adim , v en , v pwm, v syn ? v ingnd .............. 0v to 5v maximum junction temp. (t j ) ............. +125c thermal resistance (4) ja jc tssop16-ep ......................... 45 ...... 10 ... c/w soic16 .................................. 80 ...... 30 ... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device function is not guaranteed outside of the recommended operating conditions. 4) measured on jesd5 1-7, 4-layer pcb. vin fault ingnd syn pwm en adim fst 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 bst sw vss dgd ovp fb comp slope top view exposed pad for tssop20f only fault vin ingnd syn bst sw vss dgd 1 2 3 4 16 15 14 13 ovp fb comp slope 12 11 10 9 pwm en adim fst 5 6 7 8 top view pin 1 id tssop16-ep soic16
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 4 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 electrical characteristics v vin = 12v, pwm and ad pins floating, r fst =51k ? , t a = +25c, v vss =v ingnd =0v, unless otherwise noted. parameters symbol condition min typ max units fb feedback voltage v fb 190 200 210 mv fb input current i fb v fb = 0.2v -0.1 0.1 a vin uvlo rising v vinth 3.6 4 4.3 v vin uvlo hysteresis v vinhys 400 mv shut down current i off v en =0v 10 a supply current (quiescent) i q v pwm = 0v, v fb = 250mv 1.05 1.2 ma switch-on resistance ( 5 ) r ds ( on ) 0.5 ? switch leakage i swlk v vin =80v, v en =0v, v pwm =0v, v sw =0v 1 a switch current limit (5) i s_max 2.5 a oscillator frequency f sw fst pin open 0.65 0.9 1.2 mhz r fst = 200k ? 180 280 390 khz fst output voltage v fst 1 1.1 1.2 v fold-back frequency f swfb v fb = v ovp = 0v, fst pin open 160 khz v fb = v ovp = 0v, r fst = 200k ? 40 slope compensation s slope slope pin open 0.3 0.5 0.7 v/ s r slope = 200k ? 0.12 0.17 0.235 slope pin output voltage v slope 1 1.1 1.2 v maximum duty cycle d max v fb = 0.15v,fst pin open 88 % minimum on-time (5) t on 270 ns syn input current i syn v syn = 3.3v 400 a v syn = 0v -750 frequency synchronization range (5) f sw syn 0.1 2 mhz pwm dimming off threshold v pwml v pwm falling 1.65 v pwm dimming on threshold v pwmh v pwm rising 2.2 v pwm dimming frequency 100 50k hz minimum analog dimming threshold v admin v fb = 5mv 0 mv maximum analog dimming threshold v admax v fb = 200mv 1.2 v adim input current v adim = 3.3v 36 a v adim = 0v -3.5 en off threshold v enl v en falling 0.9 v en on threshold v enh v en rising 1.5 v en input current i e n v en = 3.3v 3.8 a
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 5 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 electrical characteristics (continued) v vin = 12v, pwm and ad pins floating, r fst =51k ? , t a = +25c, v vss =v ingnd =0v, unless otherwise noted. parameters symbol condition min typ max units dim gate driver sourcing current i dgd+ v dgd ?v ss = 0v, v pwm =3v -25 ma dim gate driver sinking current i dgd- v dgd ?v ss =10v, v pwm =1.5v 45 ma led open ov threshold v ovpth 1.2 v led short threshold for immediate latch-off v fbs 600 mv led short delay for latch-off dfbs 300mv < v fbs < 600mv 450 s thermal shutdown ( 5 ) 150 c thermal shutdown hysteresis ( 5 ) 20 c note: 5) guaranteed by design.
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 6 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 typical characteristics
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 7 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 typical performanc e characteristics performance waveforms are tested on the evaluation board of the design example section. v in = 12v, v inh = 125v, v led =180v i led = 120ma, t a = 25c, unless otherwise noted. pwm dimming curve analog dimming curve v sw 50v/div. v in 10v/div. v ss 50v/div. i l 500ma/div. v sw 50v/div. v in 10v/div. v ss 50v/div. i led 100ma/div. v sw 50v/div. v fault 5v/div. v ss 50v/div. i l 500ma/div. v sw 50v/div. v fault 5v/div. v ss 50v/div. i short 5a/div. v sw 50v/div. v en 5v/div. v ss 50v/div. i led 100ma/div. v sw 50v/div. v pwm 5v/div. v ss 50v/div. i led 100ma/div. steady state vin start en start pwm dimming f pwm =200hz, d pwm =50% open led load @ working short led- to gnd @ working 0 20 40 60 80 100 120 140 0 20 40 60 80 100 led current (ma) led current (ma) v adim_evb (v) 0 20 40 60 80 100 120 140 0 0.2 0.4 0.6 0.8 1 1.2
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 8 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 pin functions pin # soic16 pin # tssop 16-ep name description 2 1 vin positive voltage input. requires a decoupling capacitor to prevent large input- voltage spikes. 1 2 fault fault condition output. open drain with reference to ingnd. fault is high-z during normal operation, and pulled to ingnd when led short protection or led open protection trigger. 3 3 ingnd input ground reference. 4 4 syn frequency synchronization input. the sw itching frequency can be synchronized with an external clock. multiple ics? frequencies can also be synchronized without the external clock by connecting all the syn pi ns together. they follow the highest set frequency. 5 5 pwm pwm dimming input. apply a 100hz to 50khz square wave signal with amplitude greater than 2.2v. the pwm pin voltage is high if left floating. 6 6 en enable input pin. a voltage greater than 1.5v will turn on the chip. 7 7 adim analog dimming input. a voltage in range of 0v to 1.2v on adim pin adjusts the led current from 0 to 100%. the adim pi n voltage is high (about 3.3v) if left floating. 8 8 fst frequency set. a resistor from fst to vss sets the switching frequency if there is no syn input. if left open, switching frequency reverts to an internal default value. 9 9 slope programmable slope compensation. connect a resistor from slope to vss to set the slope-compensation peak amplitude. if left open, slope compensation reverts to an internal default value. 10 10 comp error amplifier output. connect a capacitor 1nf from the comp pin to vss to improve the stability and to provide a so ft-start on start-up or for pwm dimming. 11 11 fb led current feedback. t he MP4603 regulates the volt age across the current sensing resistor between fb and vss with 200mv. if the fb voltage exceeds 300mv for 450s or exceeds 600mv, led short protection triggers. 12 12 ovp over voltage protection. use one exter nal resistor voltage divider from the output to vss to program the ovp thre shold. this voltage references vss. when the ovp pin voltage reaches the 1.2v threshold, the switch turns off and the ic latches off. when the ovp pin vo ltage falls below 0.4v and the fb pin voltage is less than 0.1v, the chip freq uency folds back. program the ovp pin voltage from 0.4v to 1.2v for normal operation. 13 13 dgd led dimming-switch gate drive output. 14 14 vss negative voltage output. the voltage reference for ovp, fb, comp, slope, dgd and fst. 15 15 sw switch output. the source of the intern al mosfet switch. connect to the power inductor and cathode of the schottky rectifier. 16 16 bst bootstrap. connect a capaci tor between the sw and bst pins to form a floating supply across the power switch driver.
MP4603 ? white led driver for large lcd tv backlights MP4603 rev. 1.0 www.monolithicpower.com 9 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 block diagram en ddim ingnd vss v0p20 fb vin 20x syn ingnd fst slope vss drvin hsg bst sw ovp vss dgd comp bandgap & bias en vbg v0p20 level shift vss vbg bst sw bst regulator ov ovp over- voltage protection vss ea ref fb soft- start current limit dimin pwm ilim comp control loop osc vbg ingnd syn fst scst sc clk eni en ddim ingnd vss vin fbref dimin dimming control v0p20 vbg vbg diming fet gate drive dimin fault ingnd pwm ilim clk hson ov logic faltdrv adim adim figure 1: functional block diagram
MP4603 ? white led driver for la rge size tv backlighting MP4603 rev. 1.0 www.monolithicpower.com 10 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 operation the MP4603 is a current mode regulator. the sensing resistor senses the led current and the signal goes an error amplifier, which regulates it to 200mv through an internal compensation network?the comp pin is the output of the error amplifier. the inductor peak current is proportional to the comp voltage. increasing the comp voltage increases the current delivered to the output. led open protection if the led is open, there is no voltage on the fb pin. the duty cycle increases until v ovp -v vss reaches the shutdown threshold. the top switch turns off, and the ic latches off. at led open protection, the fault pin goes low. led short protection if the fb voltage exceeds 600mv, the ic immediately latches off and dgd goes low. if the fb voltage exceeds 300mv for around 450s, ic latches off and dgd goes low. the en pin must reset to restart the ic. the fault pin goes low when the ic latches off. dimming control the MP4603 allows for both analog and pwm dimming. the analog dimming voltage range on adim goes from 0v to1.2v to change the led current from 0% to 100% of the maximum led current. if the voltage on the adim pin exceeds 1.2v or is floating, led current goes to its maximum. pwm dimming uses a square-wave signal with a 100hz-to-50khz frequency range and an amplitude over 2.2v applied to the pwm pin. pwm dimming can achieve over 1:1000 dimming ratio with pwm frequency less than 200hz during the pwm dimming off interval, an internal switch disconnects the comp pin capacitor from the output of the error amplifier: this holds the comp voltage during the pwm off interval and increases the led current response speed to achieve a high dimming ratio. combine pwm and analog dimming to increase the dimming ratio. apply a 100hz to 50khz pwm signal on pwm pin and a analog dimming signal in range of 0v to 1.2v on adim pin. .
MP4603 ? white led driver for la rge size tv backlighting MP4603 rev. 1.0 www.monolithicpower.com 11 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 application information the MP4603 is a buck-boost led driver. its novel power leverage control technology provides a highly efficient, low-cost solution for lcd tv led drivers. it has a high bus voltage and a low supply voltage (typically 12v or 24v, up to 60v) to drive led backlight strings of >350v for lcd tvs measuring 60-inch or more. setting the led current an external resistor (r fb ) sets the maximum led current as per: fb led 0.200v r i ? setting the switching frequency an external resistor r fst can set the switching frequency (f s ) as per: ?? s fst 60k f0.95mhz r this equation applies to a programmable frequency range between 200khz and 2mhz. if fst pin is floating or r fst exceeds 400k ? , the switching frequency is set to default value of 0.9mhz. setting the slope compensation the MP4603 employs peak-current?mode control, which needs slope compensation to avoid sub-harmonic oscillation when the duty cycle exceeds 50%. the current loop has effective sense resistance of 0.4 ? . given a desired input/output voltage relationship, estimate the sense current ramp- down slope as: l down v s0.4v/s l ?? ? where v l is the voltage across the inductor in volt; and l is the inductor value in h. ensuring current loop stability requires a compensation slope of at least half of the ramp- down slope: sc down 1 ss 2 ?? an external resistor (r slope ) can set the slope compensation for the current loop as per: sc slope 60k v s=0.6 * s r ? the equation is effective only for a resistor range from 20k ? to 400k ? for r slope . if slope pin is floating or r slope exceeds 400k ? , the slope compensation is set to default value of 0.5v/ s. selecting the inductor the input voltage, output voltage, and led current factor into inductor selection. in addition, select the inductor so that the circuit always operates in continuous current mode (ccm). estimate the inductor value using the following equation: in out sin out l vv l f(v v ) i ? ? ? ??? where ? i l is the inductor peak-to-peak current ripple. design ? i l somewhere around 40% to 60% of the inductor average current, which is: out l _ avg led in v ii(1) v ??? . select an inductor that does not saturate at the maximum peak current, which is: l_pk l_avg l ii 0.5i ? ??? . selecting the input capacitor the input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. use ceramic capacitors with x5r or x7r dielectrics because they have low esr values and small temperature coefficients. select a sufficiently-large capacitance to limit the input voltage ripple ( ? v in ), which is normally less than 5%-10% of the dc value. l_avg out in sininout iv c fv(vv) ? ? ?? ? ?
MP4603 ? white led driver for la rge size tv backlighting MP4603 rev. 1.0 www.monolithicpower.com 12 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 selecting the output capacitor the output capacitor normally limits the output voltage ripple ( ? v out ) to less than 1%-to-5% of the dc value, and ensures a stable feedback loop. select an output capacitor value with low impedance at the switching frequency. use ceramic capacitors with x5r or x7r dielectrics for their low esr characteristics. led out out soutinout iv c fv (vv) ? ? ?? ? ? setting the over voltage protection the output voltages of some converters, such as buck-boost and boost converters, can rise to very high levels without a limiting function. over- voltage protection (ovp) limits the output voltage to below the operating rating. use a voltage divider to set the ovp point. ??? 1 ovp 2 r v1.2v(1) r where r 1 and r 2 are the voltage divider (refer the typical application). for most applications, set the ovp point around 10% to 30% higher than the output voltage. check that the set ovp point will not exceed the operation rating. fault condition output the MP4603 has an open drain output as a fault indicator. under normal conditions, fault is a high-z output and can be set to any desired voltage with external resistors. however, if v fb exceeds vss by 600mv, or v fb exceeds vss by 300mv for ~450 s, or ovp triggers at 1.2v, fault drops to the ingnd level. the r dson for this pull down switch is ~100 ? . pc board layout place the high-current paths (vss, vin and sw) very close to the device with short, direct, and wide traces. place the input capacitor as close as possible to the vin and vss pins. place the external feedback resistors next to the fb pin. keep the switch node traces short and far away from the feedback network. pay attention to the layout of the high frequency switching loop, which should be placed as small as possible. for buck applications, the high frequency switching loop is composed of the input capacitor, the internal switch of ic (vin pin to sw pin) and the diode. place the input capacitor and the diode close to the ic. for buck-boost applications, the high frequency switching loop is composed of the input capacitor, the internal switch, the diode and the output capacitor. place the input and output capacitors close together, close to the ic, and to the diode. top layer bottom layer figure 2: pcb layout
MP4603 ? white led driver for large size backlighting MP4603 rev1.0 www.monolithicpower.com 13 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 typical application circuits fault bst vin ingnd syn pwm en adim fst sw vss dgd ovp fb comp slope fault vin c in clk/ syn pwm en adim 300k r fault r fst r slope 300k c comp 10n 100k c bst 100n l1 c out r2 r1 r fb MP4603 vin 12v v inh 150v led+ vled 180v fault vin clk/ syn pwm en adim led- 12v 12v block1 block2 led- figure 3: white led driver for tv applications
MP4603 ? white led driver for large size backlighting MP4603 rev1.0 www.monolithicpower.com 14 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 design example this design example shows an lcd tv led backlight application. figure 4 shows the system power structure block diagram. mps?s hfc0100 flyback controller controls the flyback, offering 2 outputs: 12v in and v inh . the high output, v inh , provides a bias voltage (less than the led string voltage) for all led strings and connects to the anodes. the low output, 12v in , is about 12v and supplies the MP4603 led driver; the MP4603 generates a negative voltage and connects to the cathode of the led strings to drive the led strings. hfc0100 flyback ac input 12v in v in h MP4603 led driver MP4603 led driver ingnd ingnd led1- led2- figure 4: system power block diagram specifications flyback output: v inh = typical 145v (140v to 160v): cross- regulation in the multiple output flyback is the primary cause of the large tolerance. 12v in is 12v; output: 2 outputs of 120ma for every string led voltage is typical 180v (165v to 195v) switching frequency: ~200khz protections: open led string protection short led string protection MP4603 operating range: input voltage = 12v output voltage = -5v to -55v led current = 120ma. figure 5 shows the schematic of the MP4603 led driver stage. jp1 is short and jp2 is open.
MP4603 ? white led driver for large size backlighting MP4603 rev1.0 www.monolithicpower.com 15 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 figure 5: led driver schematic used for evaluation (ev4603-s-00a) setting current sense resistor the sense resistor r fb is: fb led 0.200v r i ? use two 3.32 ? resistor in parallel (r15 and r16) as the led current sensor resistor. setting the frequency set resistor the following equation determines the frequency set resistor, r18: s 0.95mhz 60k r18 f ? ? select 300k ? to set the switching frequency to about 200khz. selecting the inductor select an inductor such that the circuit always operates in ccm as per the following equation: ? ? ?? ??? in_min out_max out_max s in_min out_max led in_min vv l1 v f(v v ) i(1 ) v where ? is about 40% to 60%. select an inductance of 100 h and the inductor peak-to- peak current of 0.49a. select an inductor that does not saturate at the maximum peak current, which is: l_pk l_avg l ii 0.5i ? ??? select l1=100 h with a saturation current of 1.5a setting the slope compensation the voltage across the inductor in the buck- boost converter is the output voltage. the maximum slope compensation is: ? ?? out_max down v s0.4v/s l to ensure current-loop stability, select a compensation slope that is at least half of the needed ramp-down slope: sc down 1 ss 2 ?? s sc 0.11v/ s. use the slope compensation resistor r slope to set the slope compensation for the current loop as per the following equation: sc v 0.6 s r19 60k ? s ? ?? based on this equation, the slope compensation resistor cannot exceed 330k ? .
MP4603 ? white led driver for large size backlighting MP4603 rev1.0 www.monolithicpower.com 16 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 select r19=300k ? as the compensation resistor. selecting the input and output capacitor estimate the input capacitor and output capacitor using the following equations. l_avg out in sininout iv c fv(vv) ? ? ?? ? ? led out out soutinout iv c fv (vv) ? ? ?? ? ? where v in is about 5%-to-10% of the input voltage, and v out is about 1%-to-5% of the output voltage. select c2=2.2 f ceramic capacitor as the input capacitor and c8=2.2 f as the output capacitor setting the over voltage protection set the ovp point is about 1.1x-to-1.2x of the output voltage so that the ovp point is about 60v to 66v. ??? 5 ovp 12 r v1.2v(1 ) r select r12=20k ? and r5=1m ? ; the ovp point is 63v .
MP4603 ? white led driver for large size backlighting MP4603 rev1.0 www.monolithicpower.com 17 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 package information tssop16-ep note: 1) all dimensions are in millimeters . 2) package length does not include mold flash , protrusion or gate burr . 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming ) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-153, variation abt. 6) drawing is not to scale. 0.19 0.30 4.90 5.10 seating plane 0.65 bsc pin 1 id 4.30 4.50 6.20 6.60 18 9 16 0.80 1.05 1.20 max 0.00 0.15 top view front view side view 0.09 0.20 recommended land pattern 5.80 typ 1.60 typ 0.40 typ 0.65 bsc 2.80 typ 3.30 typ detail a 0.45 0.75 0 o -8 o 0.25 bsc gauge plane see detail "a"
MP4603 ? white led driver for large size backlighting notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP4603 rev. 1.0 www.monolithicpower.com 18 4/27/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved.MP4603 soic16 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150 (3.80) 0.157 (4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.386( 9.80) 0.394(10.00) 0.053(1.35) 0.069(1.75) top view front view 0.228 (5.80) 0.244 (6.20) side view 1 8 16 9 recommended land pattern 0.213 (5.40) 0.063 (1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) drawing conforms to jedec ms-012, variation ac. 6) drawing is not to scale. 0.010(0.25) bsc gauge plane

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