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  ? semiconductor components industries, llc, 2016 march, 2016 ? rev. p1 1 publication order number: ncp4371/d ncp4371 product preview qualcomm quick charge  3.0 hvdcp controller ncp4371 is a usb secondary side fast?charging controller, supporting qualcomm quick charge 3.0 (qc 3.0) high voltage dedicated charging port (hvdcp) class a and class b specification. ncp4371 allows for selection of the output voltage of an ac?dc usb adapter based on commands from the portable device (pd) being powered. selecting a higher charging voltage will reduce the charging current for a given power level resulting in reduced ir drops and increased system efficiency. anothe r advantage of qc3.0 is a decreased battery charging time and a reduced pd system cost thanks to the ability to select an optimum charging voltage. this eliminates the need for costly dc?dc converters within the pd. the usb?bus voltage can be controlled in discreet steps from 3.6 v up to 20 v. the output current is limited not to exceed maximum allowable power level. the ncp4371 resides at the secondary (isolated) side of the adapter. it includes voltage and current feedback regulation eliminating the need for a shunt regulator such as tl431. the ncp4371 provides charging current limits down to vbus = 2.2 v protecting the portable device from excessive currents in case of a soft short?circuit condition. the ncp4371 integrates a safe?discharge circuitry to quickly and reliably discharge output capacitors in case the usb cable is unplugged or connected to a 5 v only usb port. features ? supports qualcomm quick charge 3.0 hvdcp class a/b ? output voltage can be configured in discreet steps from ? class a: 3.6 v up to 12 v ? class b: 3.6 v up to 20 v ? compatible with usb battery charging specification revision 1.2 (usb bc1.2) ? constant voltage and constant current regulation ? soft short?circuit current limitation down to v bus = 2.2 v ? removes a need for the secondary side shunt regulator such as tl431 ? output capacitor safe?discharge circuitry at cable unplug ? fast dynamic response ? built?in power limiting function ? low supply current ? wide operating input voltage range: 2.2 v to 28 v ? this is pb?free device typical applications ? fast charging ac/dc adapters for smart phones, tablets and other portable devices this document contains information on a product under development. on semiconductor reserves the right to change or discontinue this product without notice. www. onsemi.com soic?8 d suffix case 751 1 8 xxxxx = specific device code a = assembly location l = wafer lot y = year w = work week  = pb?free package xxxxx alyw   1 8 see detailed ordering, marking and shipping information in the package dimensions section on page 12 of this data sheet. ordering information marking diagram pin connections (top view) vcc gnd d? d+ discharge drive isns comp
ncp4371 www. onsemi.com 2 figure 1. typical application schematic c out d2 r4 c6 r6 r_sense comp gnd isns vcc discharge ~ vcc fb gnd drv cs hv vcc vcc opto c1 c2 c3 t1 r_cs d3 d4 ncp4371 vin drive zcd c5 r5 d1 r1 r2 r3 c4 r7 r_dis flyback controller d? d+ vbus gnd d+ d? usb
ncp4371 www. onsemi.com 3 sw discharge_en power reset voltage regulation current regulation ota vcc isns gnd drive sink only sink only ota hvdcp logic discharge comp d+ d? bandgap demux pwr. limit management figure 2. simplified block diagram i discharge v refc v refv v refc v refv r vsns_dwn r vsns_up v cc r dat_lkg r dm_dwn v dda v ddd v cc v cc(uvlo) table 1. pin function description pin no. pin name description 1 discharge this output is used to safely discharge v bus output capacitors when an unplug event is detected 2 drive output of current sinking ota amplifier or amplifiers driving feedback optocoupler?s led. connect here compensation network (networks) as well. 3 isns current sensing input for output current regulation, connect it to shunt resistor in ground branch. 4 comp compensation pin of output voltage regulation, connected to a feedback compensation network. 5 d+ usb d+ data line input 6 d? usb d? data line input 7 gnd ground 8 vcc supply voltage pin
ncp4371 www. onsemi.com 4 table 2. maximum ratings rating symbol value unit supply voltage v cc ?0.3 to 28.0 100 v ma discharge pin v discharge ?0.3 to v cc +500/?40 v ma drive pin v drive ?0.3 to v cc +100/?90 v ma d+, d?, vsns, isns input voltage v d+ , v d? , v vsns , v isns ?0.3 to 5.5 100 v ma junction to air thermal resistance, soic8 r j?a_soic8 160 c/w maximum junction temperature t jmax 125 c storage temperature t stg ?60 to 150 c esd capability, human body model (notes 1, 4) esd hbm 6000 v esd capability, machine model (note 1) esd mm 200 v esd capability, charged device model (note 1) esd cdm 750 v stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. refer to electrical characteristis and application information for safe operating area. 2. this device series incorporates esd protection and is tested by the following methods: esd human body model tested per aec?q100?002 (eia/jesd22?a114) esd machine model tested per aec?q100?003 (eia/jesd22?a115) esd charged device model per jedec standard jesd22?c101d latchup current maximum rating <100 ma per jedec standard: jesd78 with respect to max. ratings table values 3. for information, please refer to our soldering and mounting techniques reference manual, solderrm/d 4. d+ vs. d? pin capability hbm 2500 v table 3. electrical characteristics ?40 c tj 125 c; v cc = 5 v; unless otherwise noted. typical values are at t j = +25 c. parameter test conditions symbol min typ max unit supply minimum operating input voltage v cc voltage at which current limiting ota is enabled v cc(min) ? ? 2.2 v v cc hvdcp logic enable v cc increasing level at which the hvdcp commands are accepted v cc(on) 2.9 3.2 3.4 v v cc hvdcp logic disable v cc decreasing level at which the hvdcp commands are stopped to be accepted v cc(off) 2.7 3.0 3.2 v quiescent current i cc 300  a voltage control loop ota transconductance sink current only g mv ? 1 ? s voltage control reference voltage nominal v bus =5 v v refv 1.21 1.25 1.29 v sink current capability i sinkv 2.0 ma output voltage sense divider resistor, pull?up r vsns_up 66 k  output voltage sense divider resistor, pull?down r vsns_dwn 24 k  current control loop ota transconductance sink current only g mc ? 3 ? s current control reference voltage current limit a reference set?point current limit b reference set?point current limit c reference set?point current limit d reference set?point current limit e reference set?point current limit f reference set?point current limit g reference set?point current limit h reference set?point v refc(a) v refc(b) v refc(c) v refc(d) v refc(e) v refc(f) v refc(g) v refc(h) 10 12 18 24 29 34 40 53 14 17 22 28 33 38 44 57 18 21 26 32 37 42 48 61 mv
ncp4371 www. onsemi.com 5 table 3. electrical characteristics ?40 c tj 125 c; v cc = 5 v; unless otherwise noted. typical values are at t j = +25 c. parameter unit max typ min symbol test conditions current control loop ota sink current capability i sinkc 2.0 ma hvdcp output voltage selection reference v sel_ref 1.8 2 2.2 v data detect voltage v dat_ref 0.25 0.325 0.4 v data line leakage resistance r dat_lkg 300 ? 1500 k  d? pull?down resistance r dm_dwn 14.25 19.53 24.8 k  d+ to d? resistance during dcp mode r dcp_dat 45  output capacitor discharger discharge comparator off voltage v bus_ref = 5 v, v dis(off) sensed at vcc pin v dis(off) 5.2 mv vcc discharge current discharge current of the internal current sink at the vcc pin i dis(vcc) 90 ma discharge pin maximum sink current maximum sink current of the discharge pin minimum recommended external discharge resistor value connected from v bus to discharge pin is r dis >=70  (class a) discharge pin is r dis >=120  (class b) i dis(ext) 150 ma product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions.
ncp4371 www. onsemi.com 6 typical characteristics figure 3. v cc minimum operating input voltage, v cc(min) figure 4. quiescent current, i cc temperature ( c) temperature ( c) 110 80 65 35 20 ?10 ?25 ?40 1.4 1.6 1.8 2.0 2.2 2.4 200 220 240 260 280 300 figure 5. v cc hvdcp logic enable, v cc(on) figure 6. v cc hvdcp logic disable, v cc(off) temperature ( c) temperature ( c) 2.6 2.8 3.0 3.2 3.4 3.6 2.6 2.8 3.0 3.2 3.4 figure 7. voltage control reference voltage, v refv figure 8. current control reference voltage, v refc(a) temperature ( c) temperature ( c) 1.0 1.1 1.2 1.3 1.4 1.5 10 12 14 16 18 20 v cc(min) (v) i cc (  a) v cc(on) (v) v cc(off) (v) v refv (v) v refc(a) (mv) 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125
ncp4371 www. onsemi.com 7 typical characteristics figure 9. output voltage selection reference, v sel_ref figure 10. data detect voltage, v dat_ref temperature ( c) temperature ( c) 110 80 65 35 20 ?10 ?25 ?40 1.8 1.9 2.0 2.1 2.2 0.20 0.24 0.28 0.32 0.36 0.40 figure 11. d+ to d? resistance during dcp mode, r dcp_dat figure 12. d? pull?down resistance, r dm_dwn temperature ( c) temperature ( c) 0 20 40 60 15 17 19 21 23 25 figure 13. discharge comparator off voltage, v dis(off) figure 14. vcc discharge current, i dis(vcc) temperature ( c) temperature ( c) 4.8 5.0 5.2 5.4 5.6 5.8 50 60 70 90 100 v sel_ref (v) v dat_ref (v) r dcp_dat (  ) r dm_dwn (k  ) v dis(off) (v) i dis(vcc) (ma) 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 80
ncp4371 www. onsemi.com 8 typical characteristics figure 15. vcc discharge current, i dis(ext) temperature ( c) 70 100 160 190 220 250 i dis(ext) (ma) 110 80 65 35 20 ?10 ?25 ?40 5 50 95 125 130
ncp4371 www. onsemi.com 9 application information the ncp4371 is designed to operate as an output voltage and current controller for usb chargers, which resides on the secondary side of the off?line adapter. it enables to accommodate the output voltage based on the request from the portable device in order to optimize the battery charge time. the ncp4371 is compatible with qualcomm quick charge 3.0 hvdcp specification. the output voltage can be increased or decreased in discrete steps. the output current is limited not to exceed the maximum power limit for given output voltage level. the internal discharge switch discharges the output capacitors to a safe voltage level in a case of the cable unplug. voltage regulation the voltage regulation path eliminates a need for a voltage shunt regulator at the secondary side of the off?line supply. the voltage on vcc pin is divided by internal resistor divider (r vsns_up , r vsns_dwn ) and compared with the internal precise voltage reference v refv . the voltage difference is amplified by g mv of the transconductance amplifier. the amplifier output current is connected to the drive pin. this drive pin drives regulation optocoupler that provides regulation of primary side. the internal voltage reference v refv is adjustable based on the command from the portable device compatible with qualcomm quick charge specification. the voltage control loop compensation network shall be connected between drive and comp pins. current regulation the output current is sensed by the shunt resistor r_sense in series with the load. voltage drop on r_sense is compared with internal precise voltage reference v refc at isns transconductance amplifier input. voltage difference is amplified by g mc to output current of amplifier, connected to the drive pin. hvdcp mode after power?up pins d+ and d? of ncp4371 are shorted with impedance r dcp_dat and internal reference voltage v refv is set to v bus voltage 5 v. the device is in a bc1.2 compatible mode. if a portable device compatible with the qualcomm quick charge specification is connected a negotiation between hvdcp and pd is executed. once the negotiation is successful the ncp4371 opens d+ and d? short connection and d? is pulled down with a r dm_dwn. the ncp4371 enters hvdcp mode. it monitors d+ and d? inputs. based on the specified control patterns the internal voltage reference value v refv is adjusted in order to increase or decrease output voltage to the required value. the ncp4371 is available in class a and class b version. class a allows to change the output voltage up to v bus = 12 v. class b allows output voltage up to 20 v. if the unplug event is detected the decoder circuitry turns?on an internal current sink, which discharges the output capacitors to a safe voltage level. if the ncp4371 is set to a continuous mode it responds to the pd requests in a single request mode. it does not support group request mode. table 4. d+ and d? output voltage coding portable device hvdcp class a hvdcp class b d+ d? adapter voltage adapter voltage 0.6 v 0.6 v 12 v 12 v 3.3 v 0.6 v 9 v 9 v 0.6 v 3.3 v continuous mode continuous mode 3.3 v 3.3 v previous voltage 20 v 0.6 v gnd 5 v 5v d+ d? dp_sel_ref dm_sel_ref dp_dat_ref dm_dat_ref figure 16. hvdcp d+ and d? comparators r dat_lkg r dm_dwn v sel_ref v dat_ref v dat_ref v sel_ref hvdcp mode ? continuous mode the continuous mode of operation leverages the previously unused state in qc2.0. if the portable devices try and utilize this mode, it applies voltages on d+ and d? per table 4. assuming the hvdcp supports this mode of operation, it will glitch filter the request as it currently does, using t glitch_v_change . before the portable device can begin to increment or decrement the voltage, it must wait t v_new_request_cont before pulling d+ and d? high or low. once this time has finished, the portable device now attempts to increment or decrement the voltage. to increment, the portable device sends a pulse of width t active by pulling d+ to v dp_up and then must return d+ to v dp_src for t inactive . the ncp4371 responds to the increment/decrement request in a single request mode, i.e. the output voltage is changed immediately with each request. for the single request, and hvdcp recognizes a rising edge on d+ for an increment, and falling edge on d? for a decrement, and glitch filters this with t glitch_cont_change . after this period, it begins changing its output voltage by incrementing or decrementing in a 200 mv step. the output voltage is at its final value within t v_cont_change_single .
ncp4371 www. onsemi.com 10 bc over d?initial low continuous mode request short d+/d? open d? pull?down start power?on reset open d+/d? d? pull?down bc done hvdcp discrete hvdcp continuous 5 v request 9 v request 12 v request 20 v request 5 v request increment request decrement request unplug bc done figure 17. ncp4371 state diagram v bus = 5 v v bus = 5 v v bus = 20 v unplug v bus = 12 v v bus = 9 v v bus = v bus ? 200 mv min. 3.6 v v bus = v bus + 200 mv max. 12 v/20 v for class a/b
ncp4371 www. onsemi.com 11 power limit the protocol decoder and the power limit logic will limit maximum output current to keep regulation within recommended v out /i out operating range. the power limit block adjusts v refc voltage reference at the current regulation loop in order to limit the maximum output current. the ncp4371 is designed to give a user a high degree of freedom to optimize maximum power and current limit profile of the target application. the user can scale both ? maximum output power and maximum current limit independently. the ncp4371 has two constant power curves defined ? ?option a? for class a only and ?option b? for either class a or class b. power option c shall be used for applications where constant power regulation is not required. if power option c is selected then power limiting curve is ignored. the applications based on power option c operate in ?constant current regulation mode?. in order to scale the power limit curve for the given power a selection of the current sense resistor has to be done. the relation between current sense resistor and output power limit is given by the curves in figure 18. figure 18. r sense vs. p out limit curve p (w) 6 8 10 14 18 20 rsense (m  ) 24 22 21 25 19 17 16 15 18 20 23 pout limit option a 12 16 pout limit option b the characteristics in the figure 23 cover a range p out = 15 ? 25 w. for powers outside this interval following formula can be used for r sense selection: o ption a (class a only) : (eq. 1 ) r sense  168 p max [m  ] o ption b (class a & b) : (eq. 2 ) r sense  277 p max [m  ] once the power limit is defined by an r_sense selection the user needs to define a maximum output current limit. this current limit can be given by a connector or cable maximum current rating. there are 5 current limit options available for power option a and 8 current limit options for power option b and c. each power limit option corresponds to a particular current control reference voltage (v refc ), which limits the maximum output current for the selected r_sense resistor. the user has to make a selection from current limit characteristics shown in figure 19. each power limit curve represents a unique device option (see table device options). figure 19. current limit characteristics p (w) 1.2 1.4 2.0 2.4 3.0 3.4 i out(max) (a) 24 22 21 25 19 17 16 15 18 20 23 a 1.6 1.8 2.2 2.6 2.8 3.2 4.0 b c d e power option a current limit selection p (w) 0.8 2.0 2.8 3.6 4.0 i out(max) (a) 24 22 21 25 19 17 16 15 18 20 23 a 1.2 1.6 2.4 3.2 4.4 b c d e power option b current limit selection f g h 3.6 3.8
ncp4371 www. onsemi.com 12 table 5. current limit option reference voltage current limit option a b c d e f g h v refc [mv] 14 17 22 28 33 38 44 57 soft short?circuit protection in case of a short?circuit at the usb cable end or the portable device usb receptacle it is desired to limit the short circuit current to prevent a portable device or cable from a damage. the ncp4371 offers an extended region of output current limiting down to v bus = 2.2 v. if the v bus falls below v cc(off) then the hvdcp logic is disabled and d+/? pins are shorted. no further commands from the portable device are accepted. the only feature enabled is the output current limiting at the moment. the device stays in the current limiting mode until v cc rises back above v cc(on) threshold. the device logic will resume its operation and goes to a default bc1.2 compatible mode. a new negotiation between the charger and portable device has to be carried out in order to enable hvdcp compatibility mode. discharge if voltage level lower than actual v bus is requested by pd the discharge circuitry discharges the output capacitors to reach the new voltage level in a short time. as well, the discharge circuitry is activated if cable unplug event is detected. the ncp4371 features two discharge paths. by default, the discharge is done via built?in regulated current source at vcc pin. if the vcc pin discharge capability is not sufficient an external discharge resistor r dis has to be used. the discharge resistor is wired from a positive pole of the output capacitor to the discharge pin. the minimum recommended value of the discharge resistor r dis is 100  . the discharge pin has an internal protection for a case the user wires the pin directly to v bus . if this condition is detected the discharge mosfet at the pin is turned off. it is highly recommended to use an external discharge resistor always if class b device is used. in case of class a device and c out < 1500  f the discharge pin can be left disconnected. table 6. device options opn # ncp4371___dr2g marking quickcharge class a/b power limit current limit (mv) a b a b c a b c d e f g h class a class b class a class a&b no power limit 14 17 22 28 33 38 44 57 ncp4371aacdr2g 4371aac x x x ncp4371aaedr2g 4371aae x x x NCP4371AADDR2G 4371aad x x x ncp4371accdr2g 4371acc x x x ncp4371bbedr2g 4371bbe x x x ordering information device marking package shipping ? ncp4371aacdr2g ncp4371aaedr2g NCP4371AADDR2G ncp4371accdr2g ncp4371bbedr2g 4371aac 4371aae 4371aad 4371acc 4371bbe soic?8 pb?free 2500 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
ncp4371 www. onsemi.com 13 package dimensions soic?8 nb case 751?07 issue ak seating plane 1 4 5 8 n j x 45  k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 6. 751?01 thru 751?06 are obsolete. new standard is 751?07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ?x? ?y? g m y m 0.25 (0.010) ?z? y m 0.25 (0.010) z s x s m  1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155  mm inches  scale 6:1 *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* on semiconductor and the are registered trademarks of semiconductor components industries, llc (scillc) or its subsidia ries in the united states and/or other countries. scillc owns the rights to a number of pa tents, trademarks, copyrights, trade secret s, and other intellectual property. a listin g of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf. scillc reserves the right to make changes without further notice to any product s herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any part icular purpose, nor does sci llc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typi cal? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating param eters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the right s of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgic al implant into the body, or other applications intended to s upport or sustain life, or for any other application in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer s hall indemnify and hold scillc and its officers , employees, subsidiaries, affiliates, and dist ributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufac ture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. p ublication ordering information n. american technical support : 800?282?9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81?3?5817?1050 ncp4371/d qualcomm quick charge is a trademark of qualcomm incorporated. literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 usa phone : 303?675?2175 or 800?344?3860 toll free usa/canada fax : 303?675?2176 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loc al sales representative


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