ws3206d over-voltage-protection ic with p-channel power mosfet for li-ion battery charging descriptions the ws3206d is an overvoltageprotection (ovp) device with pchannel power mosfet for liion battery charging circuit. the device will switch off internal mosfet to protect charging system when any of input voltage, input current and battery voltage over the threshold. the overtemperatureprotection (otp) function monitors chip temperature to protect the device. the ws3206d integrated a pchannel power mosfet with the body diode reverse protection and can replace external pmosfet and schottky diode in the charging system of mobile phone. the ws3206d is available in dfn2x28l package. standard product is pbfree. features high voltage technology maximum input voltage : 30v input over voltage protection (ovp) input ovp threshold: 6.8v ultra fast response of input ovp: <1us input over current protection (ocp) input ocp threshold: 1a min. battery over voltage protection battery ovp threshold: 4.35v integrated charging pmosfet pmosfet body diode reverse protection small package: dfn2x28l applications mobile phone pda other portable electronic equipment dfn2x2-8l pin configuration (top view) 3206 yyww 3206 = device code yy = year ww = week marking order information device package shipping ws3206d8/tr dfn2x28l 3000/reel&tape 1 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 acin out out chrin gatdrv vbat gnd acin gnd 1 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical applications pin descriptions pin number symbol description 1 acin 2 acin power supply input. connect to adaptor or usb power supply 3 gnd ground 4 vbat battery voltage sense input. must connect to liion through 200k resistor 5 gatdrv pchannel mosfet gate input 6 chrin power supply output. this pin provide power supply to pmic input 7 out 8 out output pin. this pin provide supply source current t o liion battery block diagram control logic input ovp charge pump ocp otp vbat ovp acin chrin out vbat gatdrv gnd gate control liion battery isens chrin gatdrv vbat chrin gatdrv out vbat acin gnd 1uf 1uf adaptor/usb pmic ws3206d r bat r sens ws3206d 2 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
absolute maximum ratings recommend operating conditions (ta=25 o c, unless otherwise noted) thermal resistance characteristics (ta=25 o c, unless otherwise noted) parameter symbol value unit junction to ambient thermal resistance a 75 junction to ambient thermal resistance b r ja 125 o c/w a surface mounted on fr4 board using 1 square inch pad size, double side, 1oz copper b surface mounted on fr4 board using minimum pad size, 1oz copper parameter symbol value unit acin pin input voltage v acin 0.3 ~ 30 v chrin pin output voltage v chrin 0.3 ~ 7.0 v out pin output voltage v out 0.3 ~ 7.0 v out pin output current iout 1.5 a power dissipation a 1.6 w power dissipation b p d 1.0 w junction temperature t j 150 o c lead soldering temperature, 10s t l 260 o c storage temperature t sg 55 ~ 150 o c hbm 8000 v esd rating mm 400 v parameter symbol value unit acin pin input voltage v acin 4.5 ~ 5.5 v output current i out 0 ~ 700 ma operating temperature t op 45 ~ 85 o c ws3206d 3 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
electronics characteristics (ta=25 o c, unless otherwise noted) parameter symbol condition min. typ. max. unit static characteristics acin quiescent current i q v acin =5v, i out =0a, i chrin =0a 250 300 ua vbat pin leakage current i vbat v bat =4.2v 10 15 na out pin input current i outoff v chrin = v gatdrv =0v, v out =4.2v, 1 ua out pin leakage current i outlkg v acin =v chrin =v gatdrv =5v, v out =0v 1 ua gatdrv pin input current i gatdrv v acin =v chrin =v gatdrv =5v 1 ua chrin discharge resistance r dischrge 500 acintoout onresistance r on v acin =5v, i out =0.7a, v gatdrv =0v 0.6 acin uvlo voltage v uvlo v acin falling 2.35 v uvlo hysteresis 250 mv chrin output poweron time t on v acin =0 to 5v, v gatdrv = v chrin 8 ms input over-voltage-protection (input ovp) input ovp threshold v ovp acin rising 6.6 6.8 7.0 v input ovp active time t ovp 1 us input ovp hysteresis 300 mv chrin output poweron recovery time t on(ovp) v acin =12 to 5v, v gatdrv = v chrin 8 ms vbat over-voltage-protection (battery ovp) vbat ovp threshold v bovp vbat rising 4.32 4.35 4.38 v vbat ovp active time t bovp 176 us vbat ovp hysteresis 290 mv input over-current-protection (input ocp) input ocp threshold i ocp 1.0 1.5 a input ocp active time t ocp 176 us input ocp recovery time t on(ocp) 64 ms over-temperature-protection (otp) otp threshold t otp 160 o c otp hysteresis 40 o c p-channel power mosfet characteristics gate threshold voltage v th v acin =5v, i out =250ua 0.8 v draintosource on resistance r on v acin =5v, i out =0.7a, v gatdrv =0v 300 m input capacitance c in 280 pf ws3206d 4 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical characteristics (ta=25 o c, unless otherwise noted) input ovp threshold vs. ambient temperature input ocp threshold vs. ambient temperature quiescent current vs. ambient temperature battery ovp threshold vs. ambient temperature uvlo threshold vs. ambient temperature on resistance vs. ambient temperature -50 -25 0 25 50 75 100 125 6.0 6.2 6.4 6.6 6.8 7.0 7.2 7.4 7.6 input ovp threshold: v ovp (v) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 battery ovp thershold: v bovp (v) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 1.00 1.05 1.10 1.15 1.20 1.25 1.30 input ocp thershold: i ocp (a) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 2.0 2.1 2.2 2.3 2.4 2.5 2.6 uvlo thershold: v uvlo (v) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 140 160 180 200 220 240 260 280 300 quiescent current: i q (ua) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 300 400 500 600 700 800 900 1000 acin-to-out on resistance: r on (m ) ambient temperature: t a ( o c) ws3206d 5 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
application informations input over-voltage-protection (ovp) the ws3206d monitors input voltage continued by the input ovp circuit. when the input voltage rises above the input ovp threshold, the internal main power n-mosfet and p-mosfet will be turned off within t ovp time and the chrin discharge fet will be turned on for chrin voltage discharge. input ovp functions protect connected system on chrin pin and out pin. when the input voltage returns below the input ovp threshold hysteresis, the internal main fet will be turned on again after t on(ovp) time. the input ovp circuit has a 300mv hysteresis and a t on(ovp) recovery time to provide noise immunity against transient event. input over-current-protection (ocp) the ws3206d monitors input current continued by the input ocp circuit. when the input current reache s the ocp threshold, the internal main fet will be turned o ff after a t ocp time. after a t on(ocp) recovery time, the main fet will be turned on again. the ws3206d has a built -in counter. when the total count of ocp fault reaches 1 6, the fet is turned off permanently, requiring an acin power on again to restart. battery over-voltage-protection (battery ovp) the ws3206d monitors the vbat pin voltage continued by the battery ovp circuit for battery over-voltage protection. when the battery voltage r eaches the battery ovp threshold, the internal main fet will be turned off after a t b(ovp) time. when the battery voltage returns below the battery ovp hysteresis, the main f et is turned on again. the ws3206d has a built-in counter. when the total count of battery ovp fault reaches 1 6, the main fet is turned off permanently, requiring an acin power on again to restart. over-temperature-protection (otp) the ws3206d has an over-temperature protection circuit. when the junction temperature exceeds 160 o c the internal thermal sense circuit turns off the main f et. when the junction temperature returns below the otp hysteresis, the internal thermal sense circuit will enable the device, resulting in a pulsed output during con tinuous thermal protection. thermal protection is designed to protect the ic in the event of over temperature cond itions. for normal operation, the junction temperature cann ot exceed 125 o c r bat resistor selection the ws3206d battery ovp circuit sense battery voltage by vbat pin. in order to limit the leakage cu rrent in the worse case, vbat pin should be connect to batte ry through a resistor. recommend resistance of r bat is 200k , the leakage current is calculated by : (vacin-vbat)/r bat in applications, vbat pin is not allowed floating and also can not be shorted to ground for normal function. input and output capacitor selection the input capacitor is for decoupling to prevent i nput voltage transient spike. recommend capacitance is 1u f. the output capacitor of chrin is for decoupling of chrin voltage. this capacitor can also be as the input capacitor of charging circuit. recommend capacitance is 1uf. in applications, the voltage of that capacitor mus t be selected properly due to the high voltage system. i n 5v system, 10v capacitor is recommended strongly. thermal considerations the ws3206d is a high power device in the charging system. the maximum power dissipation depends on pcb layout, package, and maximum junction temperature. the maximum power dissipation can be calculated by: p d =(t j -t a )/ r ja where, p d is maximum power dissipation; t j is maximum junction temperature (limited 150 o c by design); t a is ambient temperature; r ja is thermal resistance of package (junction-to-ambient). pcb layout guide the capacitor should be placed close to the ws3206d. it is recommended that connect the expose pad to a large ground plane through via for good th ermal away in the high power applications. ws3206d 6 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
package outline dimensions dfn2x2-8l dimensions in millimeter symbol min. typ. max. a 0.700 0.800 a1 0.000 0.050 a3 0.203 ref. d 1.924 2.000 2.076 e 1.924 2.000 2.076 d1 1.100 1.200 1.300 e1 0.500 0.600 0.700 k 0.200 min. b 0.200 0.250 0.300 e 0.500 typ. l 0.264 0.350 0.426 ws3206d 7 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
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