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? ACT4529M 40 v/3.0 a cv/cc buck converter featurin g qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 1 of 16 www.qorvo.com features ? aec-q100 automotive qualified ? -40 c ~ 125 c junction temperature range auto- motive qualified ? passes sae j1752 m8a emc testing ? quick charge? 2.0 certified by qualcomm ? and ul. ? ul certificate no. 4787083099-1 ? https://www.qualcomm.com/documents/quick- charge-device-list ? 40 v input voltage surge ? 4.5 v - 36 v operational input voltage ? 5.1 v/9.1 v/12.1 v output with +/-1% accuracy ? up to 3.0 a output current ? constant current regulation limit ? qc2.0 + auto-detect + usb-pd type-c support ? hiccup mode protection at output short ? >90% efficiency at full load ? 0.5 ma low standby input current ? 5.7 v/10.1 v/13.5 v output over-voltage protection for 5.1 v/9. 1 v/12.1 v outputs ? cord voltage compensation ? meet en55022 class b radiated emi standard ? 8 kv esd hbm protection on dp and dm ? sop-8ep package applications ? automotive applications ? car charger ? cigarette lighter adaptor (cla) ? cv/cc regulation dc/dc converter general description act4529 is a wide input voltage, high efficiency step- down dc/dc converter that operates in either cv (constant output voltage) mode or cc (constant output current) mode. this device has qc2.0 built in to provide 5.1 v/9.1 v/12.1 v outputs as requested by attached portable devices. besides building in qc2.0 decoding, it also supports apple, samsung and bc1.2 devices to charge at full current rate. act4529 has an interface for usb-pd control via a tri-state digital pin . v out is 5.1 v if this pin is floating, v out is 9.1v when this pin voltage is less than 0.8 v and v out is 12.1 v while this pin voltage is more than 2.0 v. act4529 has accurate output current limits under constant current regulation. it provides up to 3.0 a output current at 125 khz switching frequency. act4529 utilizes adaptive drive technique to achieve good emi performance while main >90% efficiency at full load for mini size cla designs. it also has output short circuit protection with hiccup mode. the average output current is reduced to below 6 ma when output is shorted to ground. other features include output over voltage protection and thermal shutdown. this device is available in a sop-8ep package and requires very few external components for operation. for details on sae j1752 m8a emc performance and testing, refer to active-semi application note an-106, ACT4529M automotive emc performance. typical application circuit v/i profile act4529 hsb in sw 4.5v to 40v dm rcs 20m ? csp dp vout gnd d-d+ gnd csn 5v/9v/12v c2 10 f c3 22nf c5 220 f c1 47 f c4 22 f c6 2.2 f d1 sk54l l1 40 h pdc usb-pd controller i/o cc1 cc2 cc1 cc2 3.3a 5.1v vout iout 3.2v 9.1v 12.1v downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 2 of 16 www.qorvo.com ordering information part number pdc usb auto detect qc2.0 certification package ACT4529Myh-t0010 yes no yes qc 2.0 sop-8ep ACT4529Myh-t1011 yes yes yes n/a sop-8ep pin configuration top view 8 7 6 5 1 2 3 4 csp csn gnd dp in dm sw hsb ep act4529 sop-8ep pdc downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 3 of 16 www.qorvo.com pin descriptions pin name description 1 csp voltage feedback input. connect to node of the inductor and out put capacitor. csp and csn kevin sense is recommended. 2 csn negative input terminal of output current sense. connect to the negative terminal of current sense resistor. 3 pdc usb-pd control pin. floating: 5.1 v, pulled high: 12.1 v, pulle d low: 9.1 v. do not drive this pin higher than 5 v. 4 dp data line positive input. connected to d+ of attached portable device data line. this pin passes 8 kv hbm esd. 5 dm data line negative input. connected to d- of attached portable device data li ne. this pin passes 8 kv hbm esd. 6 in power supply input. bypass this pin with a 10 f ceramic capaci tor to gnd, placed as close to the ic as possible. 7 sw power switching output to external inductor. 8 hsb high side bias pin. this provides power to the internal high-si de mosfet gate driver. connect a 22 nf capacitor from hsb pin to sw pin. 9 gnd ground and heat dissipation pad. connect this exposed pad to la rge ground copper area with copper and vias. absolute maximum ratings parameter value unit in to gnd -0.3 to 40 v sw to gnd -1 to v in +1 v hsb to gnd v sw - 0.3 to v sw + 7 v csp, csn to gnd -0.3 to +15 v pdc to gnd -0.3 to +6 v all other pins to gnd -0.3 to +6 v junction to ambient thermal resistance 46 c/w operating junction temperature -40 to 150 c storage junction temperature -55 to 150 c lead temperature (soldering 10 sec.) 300 c ? : do not exceed these limits to prevent damage to the device. exposure to absolute maximum rating conditions for long periods ma y affect device reliability downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 4 of 16 www.qorvo.com electrical characteristics (v in = 12 v, t j = -40 c ~ 125 c, unless otherwise specified.) parameter symbol condition min typ max units input over voltage protection v in _ovp rising 40 42 44 v input over voltage hysteresis 4 v input over voltage response time t_v in _ovp v in step from 30 v to 45 v 250 ns input under voltage lockout (uvlo) v in rising 4.15 4.5 4.75 v input uvlo hysteresis 200 mv input voltage power good deglitch time n o o v p 4 0 m s input voltage power good deglitch time n o u v p 1 0 u s input standby current v in = 12 v, v out = 5.1 v, i load = 0 500 ua output voltage regulation csp at full temperature 4.92 8.78 11.67 5.1 9.1 12.1 5.28 9.42 12.53 v output voltage regulation csp at room temperature 5.05 9.0 11.95 5.1 9.1 12.1 5.15 9.2 12.25 v output over voltage protection (ovp) output rising 5.5 9.7 13.0 5.7 10.1 13.5 6.0 10.5 14.0 v input brownout protection (ACT4529Myh-t1011 only) v in drop threshold falling threshold 7.5 8.0 8.5 v hysteresis 200 mv v out drop delay time 416 480 ms qc and pdc restart time 416 480 ms output over voltage deglitch time 1.0 us output voltage cord compensation ACT4529Myh-t0010 66 mv between csp and csn -25% 200 +25% mv ACT4529Myh-t1011 -25% 200 +25% mv output under voltage protection (uvp) v out v out falling -10% 3.2 10% v uvp hysteresis v out v out rising 0.55 v uvp deglitch time v out 1 0 u s uvp blanking time at startup 3.5 ms downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 5 of 16 www.qorvo.com electrical characteristics (v in = 12 v, t j = -40 c ~ 125 c, unless otherwise specified.) parameter symbol condition min typ max units output constant current limit rcs = 20 m 2.95 3.3 3.63 a hiccup waiting time 4.13 s top fet cycle by cycle current limit 4.5 5.8 a top fet rds on 70 m bot fet rds on 4.7 maximum duty cycle 99 % switching frequency -10% 125 +10% khz soft-start time 2.0 ms out voltage ripples c out = 220 uf/22 uf ceramic 80 mv v out discharge current for high to lower voltage transitions 60 ma voltage transition time for qc 2.0 transition or usb pd type c 12 v C 5 v 100 ms voltage transition time for qc 2.0 transition or usb pd type c 5 v C 12 v 100 ms line transient response input 12 v - 40 v - 12 v with 1 v/us slew rate, v out = 5 v, i load = 0 a and 2.4 a 4.75 5.25 v load transient response v out = 5 v 80 ma - 1.0 a C 80 ma load with 0.1 a/us slew rate 4.9 5.15 5.4 v v out = 9 v 80 ma - 1.0 a C 80 ma load with 0.1 a/us slew rate 8.7 9.1 9.5 v v out = 12 v 80 ma - 1.0 a C 80 ma load with 0.1 a/us slew rate 11.6 12.1 12.6 v thermal shut down 160 c thermal shut down hysteresis 30 c esd of dp, dm hbm 8 kv pdc high threshold 2.2 v pdc low threshold 0.6 v pdc drive current 10 ua downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 6 of 16 www.qorvo.com functional block diagram functional description output current sensing and regulation sense resistor is connected to csp and csn. the sensed differential voltage is compared with interval reference to regulate current. cc loop and cv loop are in parallel. the current loop response is allowed to have slower response compared to voltage loop. however, during current transient response, the inductor current overshoot/undershoot should be controlled within +/-25% to avoid inductor saturation. cycle-by-cycle current control the conventional cycle-by-cycle peak current mode is implemented with high-side fet current sense. input over voltage protection the converter is disabled if the input voltage is above 42 v (+/-2 v). device resumes operation automatically 40 ms after ovp is cleared. output over voltage protection device stops switching when output over-voltage is sensed, and resumes operation automatically when output voltage drops to ovp- hysteresis. output over voltage discharge discharge circuit starts to discharge output through csp pins when output over voltage is detected. discharge circuit brings 12 v down to 5 v in less than 100 ms. output under-voltage protection / hiccup mode there is a under voltage protection (uvp) threshold. if the uvp threshold is hit for 10 us, an over current or short circuit is assumed, and the converter goes into hiccup mode by disabling the converter and restarts after hiccup waiting period. input brownout protection (ACT4529Myh-t1011 only) if the input voltage drops below 8 v but higher than uvlo for 450 ms while in q c or pdc mode, the output voltage turns off and qc or pdc mode is disabled. if the output voltage drops below 3.7 v, the timer restarts and waits for 450 ms before attempting to restart the output voltage. when output voltage rises above 3.9 v and detects the input voltage below 8 v, timer restarts. if the input voltage is below 8 v after 450 ms, the output turns off. the cycle continues until the input voltage increases above 8.2 v,for longer than 450 ms, then output turns on, the ic renegotiates the pd and qc protocols, and normal operation restarts. thermal shutdown if the t j increases beyond 160 c, act4529 goes into hz mode and the timer is preserved until t j drops by 30 c. ? pwm controller driver current sense and control 70m ? 4.7 ? ovp csp csn gnd sw hsb uvlo vin dp dm qc2.0 detect usb auto detect pdc downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 7 of 16 www.qorvo.com functional description cord compensation cord compensation increases the output voltage with increased output current to compensate for the voltage drop across the output connector and output cable. the compensation voltage is derived as: v out = r cs *i out *k where r cs is the current sense resistance, i out is the load current, and k = 3.03 downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 8 of 16 www.qorvo.com applications information inductor selection the inductor maintains a continuous current to the out- put load. this inductor current has a ripple that is dependent on the inductance value. higher inductance reduces the peak-to-peak ripple current. the trade-off for high inductance value is the increase in inductor core size and series resistance, and the reduction in current handling capability. in general, select an inductance value l based on ripple current requirement: (1) where v in is the input voltage, v out is the output voltage, f sw is the switching frequency, i loadmax is the maximum load current, and k ripple is the ripple factor. typically, choose k ripple = 30% to correspond to the peak-to-peak ripple current being 30% of the maximum load current. with a selected inductor value the peak-to-peak inductor current is estimated as: (2) the peak inductor current is estimated as: 12 (3) the selected inductor should not saturate at i lpk . the maximum output current is calculated as: 12 (4) l lim is the internal current limit. input capacitor the input capacitor needs to be carefully selected to maintain sufficiently low ripple at the supply input of the converter. a low esr capacitor is highly recommended. since large current flows in and out of this capacitor during switching, its esr also affects efficiency. the input capacitance needs to be higher than 10 f. the best choice is the ceramic type. however, low esr tantalum or electrolytic types may also be used provided that the rms ripple current r ating is higher than 50% of the output current. the input capacitor should be placed close to the in and gnd pins of the ic, with the shortest traces possible. in the case of tantalum or electrolytic types, a ceramic capacitor is recommended to parallel with tantalum or electrolytic capacitor, which should be placed right next to the ic. output capacitor the output capacitor also needs to have low esr to keep low output voltage ripple. the output ripple voltage is: ) (5) where i outmax is the maximum output current, k ripple is the ripple factor, r esr is the esr of the output capacitor, f sw is the switching frequency, l is the inductor value, and c out is the output capacitance. from the equation above, v ripple is the combination of esr and real capacitance. in the case of ceramic output capacitors, r esr is very small and does not contribute to the ripple. therefore, a lower capacitance value can be used for ceramic type. in the case of tantalum or electrolytic capacitors, the ripple is dominated by r esr multiplied by the ripple current. in that case, the output capacitor is chosen to have sufficiently low esr. for ceramic output capacitor, typically choose a capacitance of about 22 f. for tantalum or electrolytic capacitors, choose a capacitor with less than 50 m esr. if an 330 uf or 470 uf electrolytic cap or tantalum cap is used, where ripple is dominantly caused by esr, an 2.2 uf ceramic in parallel is recommended. rectifier schottky diode use a schottky diode as the rectifier to conduct current when the high-side power switch is off. the schottky diode must have current rating higher than the maximum output current and a reverse voltage rating higher than the maximum input voltage. furthermore, the low forward voltage schottky is preferable for high efficiency and smoothly operation. downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 9 of 16 www.qorvo.com applications information current sense resistor the traces leading to and from the sense resistor can be significant error sources. with small value sense resistors, trace resistance shared with the load can cause significant errors. it is recommended to connect the sense resistor pads directly to the csp and csn pins using kelvin or 4-wire connection techniques as shown below. current limit setting when the output current reaches current limit, the ic limits the peak switch current on a cycle-by-cycle basis. this reduces the output voltage to keep the output current at a constant value. the following equation calculates the peak current limit. 66 (6) where rcs is current sense resistor. the maximum, output current is defined by 12 (7) pcb load trace kevin sense traces sense resistor downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 10 of 16 www.qorvo.com applications information pcb layout guidance when laying out the printed circuit board, the following checklist should be used to ensure proper operation of the ic. 1. arrange the power components to reduce the ac loop size consisting of cin, vin pin, sw pin and the schottky diode and gnd. 2. place input decoupling ceramic capacitor c in as close to v in pin as possible. the gnd side of c in must be placed as close as possible to to power gnd on the top layer. the traces should be short and wide. 3. the high power loss components, e.g. the controller, schottky diode, and the inductor should be placed carefully to make the thermal spread evenly on the board. 4. schottky anode pad and ic exposed pad should be placed close to ground clips in cla applications 5. use kelvin or 4-wire connection techniques from the sense resistor pads directly to the csp and csn pins. the csp and csn traces should be in parallel to avoid interference. 6. place multiple vias between top and bottom gnd planes for best heat dissipation and noise immunity. 7. use short traces connecting hsb-c hsb -sw loop. 8. sw node is noisy, switching from v in to gnd. its size should be minimized and it should be isolated away from the rest of circuit for good emi and low noise operation. example pcb layout downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 11 of 16 www.qorvo.com typical application circuit bom list for 2.4 a car charger item reference description manufacturer qty 1 u1 ic, act4529, sop-8ep active-semi 1 2 c1 capacitor, electrolytic, 47 f/35 v murata, tdk 1 3 c2 capacitor, ceramic, 10 f/25 v, 1206, smd murata, tdk 1 4 c3 capacitor, ceramic, 22 nf/25 v, 0603, smd murata, tdk 1 5 c4 capacitor, ceramic, 22 f/16 v, 1206, smd murata, tdk 1 6 c5 capacitor, electrolytic, 220 f/16 v murata, tdk 1 7 c6 capacitor, ceramic, 2.2 f/16 v, 0805, smd murata, tdk 1 8 l1 inductor, 40 h, 4 a, 20% 1 9 d1 diode, schottky, 40 v/5 a, sk54l panjit 1 10 rcs chip resistor, 20 m?, 1206, 1% murata, tdk 1 u1 act4529 hsb in sw 4.5v to 40v dm rcs 20m ? csp dp vout gnd d-d+ gnd csn 5v/9v/12v c2 10 f c3 22nf c5 220 f c1 47 f c4 22 f c6 2.2 f d1 sk54l l1 40 h pdc usb-pd controller i/o cc1 cc2 cc1 cc2 downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 12 of 16 www.qorvo.com typical performanc e characteristics (schematic as shown in typical application circuit, t a = 25 c, unless otherwise specified) downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 13 of 16 www.qorvo.com typical performanc e characteristics (schematic as shown in typical application circuit, t a = 25 c, unless otherwise specified) downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 14 of 16 www.qorvo.com typical performanc e characteristics (schematic as shown in typical application circuit, t a = 25 c, unless otherwise specified) downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 15 of 16 www.qorvo.com package outline sop-8 ep package outline and dimensions symbol dimension in millimeters dimension in inches min max min max a 1.350 1.727 0.053 0.068 a1 0.000 0.152 0.000 0.006 a2 1.245 1.550 0.049 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.007 0.010 d 4.700 5.100 0.185 0.200 d1 3.202 3.402 0.126 0.134 e 3.734 4.000 0.147 0.157 e1 5.800 6.200 0.228 0.244 e2 2.313 2.513 0.091 0.099 e 1.270 typ 0.050 typ l 0.400 1.270 0.016 0.050 0 8 0 8 downloaded from: http:///
ACT4529M 40 v/3.0 a cv/cc buck converter featuring qc2.0, usb auto-detect and usb-pd data sheet rev. 2.0, sept. 9, 2019 | subject to change withou t notice 16 of 16 www.qorvo.com contact information for the latest specifications, additional product information, worldwide sales and distribution locations: web: www.qorvo.com tel: 1-844-890-8163 email: customer.support@qorvo.com for technical questions and application information: email: appsupport@qorvo.com important notice the information contained herein is believed to be reliable; ho wever, qorvo makes no warranties regarding the information cont ained herein and assumes no responsibility or liability whatsoever fo r the use of the information contained herein. all information contained herein is subject to change without notice. customers should ob tain and verify the latest relevant information before placing orders for qorvo products. the information contained herein or any use of such information does not grant, explicitly or implicitly, to an y party any patent rights, licenses, or any other intellectual property rights, whether with regard to such information itself o r anything described by such information. this information does not constitute a warranty with res pect to the products described herein, and qorvo hereby disclaims any and a ll warranties with respect to such products whether express or implied by law, course of deal ing, course of performance, usage of trade or otherwise, including the implied warranties o f merch a ntability and fitness for a particular purpose . without limiting the generality of the foregoing, qorvo product s are not warranted or authorized for use as critical component s in medical, life-saving, or life-sustaining applications, or other applications where a failure would reasonably be expected to c ause severe personal injury or death. copyright 2019 ? qorvo, inc. | qorvo ? and active-semi ? are trademarks of qorvo, inc. downloaded from: http:///

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