WS3205D over voltage and over current protection ic descriptions the WS3205D is an over - voltage - protection (ovp) and over - current - protection (ocp) device. the device will switch off internal mosfet to disconnect acin to out to protect load when any of input voltage, input current over the threshold . the over temperature protection (otp) function monitors chip temperature to protect the device. the WS3205D is available in dfn2x3 - 8l package. standard products are pb - free and halogen - free. features ? hi gh voltage technology ? maximum input voltage : 30v ? output power on time : 8ms (typ.) ? ovp threshold : 6.1v (typ.) ? ovp response time : <1us ? ocp threshold : 3a(min.) ? output auto discharge ? small package : dfn2x3 - 8l applications ? pnd ? tablet ? ott ? hd pla yer ? digital cameras ? digital videos dfn2x3 - 8l pin configuration (top view) w3205 = device code yy = year ww = week marking order i nformation device package shipping WS3205D61 - 8/tr dfn2 x3 - 8l 3000/reel&tape 1 2 acin en gnd flag out out acin acin acin expose pad 3 4 5 6 7 8 1 2 w 3 2 0 5 y y w w 3 4 5 6 7 8 1 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification 1 2 acin en gnd flag out out acin acin acin expose pad 3 4 5 6 7 8 1 2 w 3 2 0 5 y y w w 3 4 5 6 7 8
typical a pplications pin d escriptions block diagram pin no. symbol descriptions 3 gnd ground 1,7,8 acin input pin, connect to ac adaptor or vbus. a 1 0 uf low esr c eramic capacitor or larger must be connected as close as to this p in. i t is recommended to use 50v capacitor or according to application. 5,6 out output pin, connect to load. 2 en enable pin. active low . 4 fl ag flag pin. open - drain, active low if any ovp, ocp, otp occur. expose pad acin input pin. connect to pin 1, 7, 8. acin out gnd 10 uf / 50 v 10 uf ac adaptor to load ws 3205 d en flag v i / o up 100 k on off gnd acin out control logic en charge pump ovp uvlo chip enable otp flg en flag 4 m WS3205D 2 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification acin out gnd 10 uf / 50 v 10 uf ac adaptor to load ws 3205 d en flag v i / o up 100 k on off gnd acin out control logic en charge pump ovp uvlo chip enable otp flg en flag 4 m
absolute m aximum r atings parameter symbol value unit input voltage (in pin) v in - 0.3 ~ 30 v output voltage (out pin) v out - 0.3 ~ 6.5 v power dissipation * 1 * 3 p d 0.5 w power dissipation * 2 * 3 0.3 w thermal resistan ce * 1 r ja 250 o c/w thermal resistance * 2 416 o c/w junction temperature t j 150 o c lead temperature(10s) t l 260 o c storage temperature tstg - 55 ~ 150 o c esd ratings hbm 4 000 v mm 2 00 v note: these are stress ratings only. stresses exceeding the range s pecified under 3 $ e v r o x w h maximum 5 d w l q j v may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect de vice reliability. *1: surface mounted on fr - 4 board using 1 square inch pad size , dual side , 1oz copper *2: surface mounted on fr - 4 board using minimum pad size, 1oz copper *3: power dissipation is calculated by p d = (v in - v out ) x i out recommend o peratin g c onditions (ta=25 o c, unless otherwise noted) parameter symbol value unit input voltage v in 3 .5 ~ 28 v output current i out 3 a ambient operating temperature topr - 40 ~ 85 o c WS3205D 3 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
electronics characteristics (ta=25 o c, unless otherwise noted) *3: single pulse, pulse width=380us parameter symbol test conditions min. typ. max. unit dc characteristics and power - on - reset input quiescent current i q v in =5v, i out =0a 280 350 ua in - to - out on resistance * 3 r on v in =5v, i out =3a 40 m
output auto discharge resistance r discharge 500
under voltage lock out t hreshold uvlo v in increasing from 0~3v 2.35 v under voltage lock out hysteresis v hys - uvlo v in decreasing from 3~0v 200 250 300 mv output power - on time t on v in = 0 - > 5v to output on 6 8 10 ms en threshold voltage v enl 0.4 v v enh 1.2 v en to gnd resistance r en 4 m
input over - voltage - protection (ovp) ovp threshold v ovp v in increasing from 5~7v 5.8 6.1 6.4 v ovp hysteresis v hys - ovp v in decreasing from 7~5v 100 mv ovp active time t ovp v in = 5 - > 10v 1 us ovp recovery time t on(ovp) v in = 10 - > 5v to output on 6 8 10 ms input over - current - protection (ocp) ocp threshold i ocp 3.0 a ocp active time t ocp 176 us ocp recovery time t on(ocp) 1 s ove r - temperature - protection (otp) otp threshold 160 o c otp hysteresis 40 o c WS3205D 4 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical characteristics (ta=25 o c, unless otherwise noted) ovp threshold vs. temperature uvlo t hreshold vs. temperature ocp threshold vs. temperature output voltage vs. output current -50 -25 0 25 50 75 100 5.8 5.9 6.0 6.1 6.2 vin decreasing vin increasing input ovp threshold, vovp (v) temperature ( o c) -50 -25 0 25 50 75 100 2.2 2.4 2.6 2.8 3.0 WS3205D vin decreasing vin increasing uvlo threshold, v uvlo (v) temperature ( o c) -50 -25 0 25 50 75 100 2 3 4 5 6 7 v in = 5.0v ocp threshold, i ocp (a) temperature ( o c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 output voltage(v) output current(a) v in =5.0v t=-40 o c t=25 o c t=85 o c WS3205D 5 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification -50 -25 0 25 50 75 100 5.8 5.9 6.0 6.1 6.2 vin decreasing vin increasing input ovp threshold, vovp (v) temperature ( o c) -50 -25 0 25 50 75 100 2.2 2.4 2.6 2.8 3.0 WS3205D vin decreasing vin increasing uvlo threshold, v uvlo (v) temperature ( o c) -50 -25 0 25 50 75 100 2 3 4 5 6 7 v in = 5.0v ocp threshold, i ocp (a) temperature ( o c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 output voltage(v) output current(a) v in =5.0v t=-40 o c t=25 o c t=85 o c
normally power on ovp active time normally power of f ovp recovery time WS3205D 6 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
package o utline d imensions dfn2*3 - 8l symbol dimensions in millimeters dimensions in inches min. max. min. max. a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0. 0 0 2 a 3 0 .203ref. 0.008ref. d 1.924 2.076 0.076 0. 082 e 2.924 3.076 0.115 0.121 d 1 1.400 1.600 0.055 0.063 e1 1.400 1.600 0.055 0.063 k 0. 20 0 min. 0.008min. b 0.2 00 0.300 0.008 0.012 e 0. 5 00 typ. 0.020typ. l 0.224 0.376 0.009 0.015 WS3205D 7 of 7 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
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