unisonic technologies co., ltd s3527 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2015 unisonic technologies co., ltd qw-r114-005.a pc power supply supervisor ? description the utc s3527 is designed for switch power supply system. four important functions of utc s3527 are the following: the over voltage detector (ovd), the unde r voltage detector (uvd), the over current detector (ocd) and power good signal generating. ovd/uvd monitor 3.3v, 5v and dual 12v to protect our power supply and pc, fpo goes to high when one of these supply voltages exceeds their normal operation voltage range. ocd monitors i33, i5, i12 input current sense. an adjustable over-current condition composed of iref and ?protection current range resistor? helps users design ocd easily. power good signal generating notifies personal computer when power supply is ready or power supply is going to shutdown, therefore it can provide a reliable power supply environment. ? features * the over voltage detector (ovd) monitors vx, v33, v5, v12a and v12b input voltage. * the under voltage detector (uvd) monitors v33, v5, v12a and v12b input voltage. * the over current detector (ocd) monitors i33&v33, i5&v5, i12a&v12a and i12b&v12b input pins. * the vx>1.2v provide an extra protection. * both of the power good output (pgo) and fault protection latch (fpob) are open drain output. * 75/600ms time delay for uvd/ocd/vx. * 300ms time delay for pgo. * 38ms for psonb input signal de?bounce. * 14us for ovd internal signal de?glitch. * 1ms for uvd/vx internal signal de?glitch. * 20ms for ocd internal signal de?glitch. * 73us for pgi internal signal de?glitch. * 4ms for psonb turn-off fpob. ? ordering information ordering number lead free halogen free package packing s3527l-d16-t S3527G-D16-T dip-16 tube - s3527g-s16-r sop-16 tape reel
s3527 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r114-005.a ? marking dip-16 sop-16 ? pin configuration ? pin description pin no. pin name description 1 pgi power good input signal pin 2 gnd ground 3 fpob fault protection output pin, open drain output 4 psonb on/off switch input 5 i12a 12va over current protection sense input 6 ri current sense adjust input 7 i12b 12vb over current protection sense input 8 v12b 12vb over voltage & under volt age & over current sense input pin 9 vx extra protection sense input 10 i5 5v over current protection sense input 11 i33 3.3v over current protection sense input 12 v12a 12va over voltage & under volt age & over current sense input pin 13 v33 3.3v over voltage & under vo ltage & over current sense input pin 14 v5 5v over voltage & under voltage & over current sense input pin 15 v cc power supply 16 pgo power good output signal pin, open drain output
s3527 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r114-005.a ? block diagram + - un - + ov + - un vcc vcci psonb v33 vx vref=1.2v 1.2v~1.8v pwr 38ms debounce - + ov - + ov - + ov - + ov + - un + - un - + - + - + - + - + v12a v12a v12a v12a iref*8 iref*8 iref*8 iref*8 power on reset pwr clr 4ms delay clr 75ms/ 600ms delay clr 1ms debounce clr 14us debounce clr 73us debounce clr 20ms debounce bandgap reference internal power vref=1.2v vcci=3.6v pwr clk osc r sq 300ms delay clr v12a v12a iref=vref/ri vref=1.2v + - v5 v12a v12b pgi i33 i5 i12a i12b ri pgo fpob
s3527 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r114-005.a ? absolute maximum ratings parameter symbol ratings unit supply voltage v cc , v12a -0.3~16 v pgi, psonb -0.3~v cc +0.3 max. 7v v5, i5, v33, i33 -0.3~v12a+0.3 max. 7v input voltage i12a, v12b, i12b -0.3~v12a+0.3 max. 16v v pgo -0.3~v cc +0.3 max. 7v output voltage fpob -0.3~16 v operating temperature -40~125 c storage temperature -55~150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? recommended operating conditions parameter symbol test conditions min typ max unit supply voltage v cc 3.8 5 16 v pgi, psonb, v5, v33 7 v input voltage v12a, v12b 16 v pgo 7 v output voltage fpob 16 v fpob 0.3v 10 ma output sink current pgo 0.3v 10 ma output current for ri ri 10 65 ua ? electrical characteristics (v cc =5v, t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit over voltage detection v33 3.8 3.9 4.0 v v5 5.6 5.8 6.0 v v12ab 13.5 13.85 14.2 v over voltage threshold vx use uvd timing 1.176 1.20 1.224 v i leakage leakage current fpob v(fpob)=5v 5 ua v ol low level output voltage fpob i sink =10ma 0.3 v pgi and pgo v33 2.6 2.9 3.0 v v5 4.0 4.4 4.6 v under voltage threshold v12ab 9 10.65 11.0 v input threshold voltage pgi 1.2 v i leakage leakage current pgo pgo=5v 5 ua v ol low level output voltage pgo i sink =10ma 0.5 v offset voltage of ocp comparators -6 6 mv psonb input pull-up current psonb=0v 150 ua high-level input voltage 1.8 v low-level input voltage 1.2 v total device i cc supply current psonb=5v 1 ma v cc operation start up vo ltage 3.2 3.4 3.6 v v cc under lockout voltage 2.8 3.0 3.2 v
s3527 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r114-005.a ? electrical characteristics (v cc =5v, t a =-40c~125c, unless otherwise specified) parameter symbol test conditions min typ max unit switching characteristics pgi to pgo delay time td1 100 300 400 ms td2 20 75 100 ms for 160 392 600 800 ms short circuit delay time td2-1 for 161 ms pgo to fpob delay time td3 2 4 6 ms under voltage delay time td4 40 60 81 s over current delay time td5 13 20 27 ms over voltage delay time td6 9 14 19 s vx delay time td7 40 60 81 s psonb de-bounce time tb1 24 38 52 ms pgi de-bounce time tb2 47 73 100 s
s3527 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r114-005.a ? typical application circuit utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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