sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?9 ordering?information part?no. package marking material package?type sc121ntr 121n pb?free tape?&?reel sc121natr 121na pb?free tape?&?reel sc121ngtr 121ng halogen?free tape?&?reel SC121NAGTR sot-23-6 121nag halogen?free tape?&?reel li+?battery?protection?circuit description sc12 1?is?a?li+?battery?protection?circuit.?it?is?suitable?for?protecting?li+ battery? against ? damage? from? over? charge,? over? discharge,? and? over current.?it?contains?high?accurate?voltage?detection?and?delay?circuits. features *?low?supply?current *?over-charge?detect?4.28v,?over-charge?release?4.10v. *?over-discharge?detect?2.50v,?over-discharge?release?2.90v. *?over-current?detect?0.15v,?short?current?detect?1.00v. *?overcharge/over-discharge/over-current?detection?delay *?charger?detection *?reset?resistance?for?over?current?protection *?wide?supply?voltage?range *?small?package applications *?protection?ic?for?one-cell?li+ battery?pack
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?9 block?diagram absolute?maximum?rating characteristics symbol value unit supply?voltage v dd v ss -0.3?~?v ss +12 v oc?output?pin?voltage v oc v dd -15?~?v dd +0.3 v od?output?pin?voltage v od v ss -0.3?~?v dd +0.3 v csi?input?pin?voltage v csi v dd -15?~?v dd +0.3 v operating?temperature?range t opr -40?~?+?85 c storage?temperature?range t stg -40?~?+125 c electrical?characteristics ?(tamb=25 c,?unless?otherwise?specified) characteristics symbol status min. typ. max. unit operating?voltage operating?voltage v dd 1.8 8.0 v current?consumption supply?current i dd v dd =3.9v 3.0 6.0 m a power?down?current i pd v dd =2.0v 0.3 0.6 m a detection?voltage over?charge?detection?voltage v ocu 4.24 4.28 4.32 v over?charge?release?voltage v ocr 4.05 4.10 4.15 v over?discharge?detection?voltage v odl 2.40 2.50 2.60 v over?discharge?release?voltage v odr 2.80 2.90 3.00 v
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?9 characteristics symbol status min. typ. max. unit over?current?1?detection?voltage v oi1 0.13 0.15 0.17 v over?current?2(short?current) detection voltage v oi2 v dd =3.6v 0.80 1.00 1.20 v over?current?reset?resistor r short ?v dd =3.6v 400 500 600 k w charger?detection?voltage v ch -0.8 -0.5 -0.2 v delay?time over?charge?detection?delay?time t oc v dd =3.6v~4.4v 150 340 500 ms over?discharge?detection?delay?time t od v dd =3.6v~2.0v 80 200 300 ms over?current?1?detection?delay?time t oi1 v dd =3.6v 5 13 20 ms over?current?2(short?current) detection delay?time t oi2 v dd =3.6v 5 50 m s other oc?pin?output??h??voltage v oh1 v dd -0.1 v dd -0.02 v oc?pin?output??l??voltage v ol1 0.01 0.1 v od?pin?output??h??voltage v oh2 v dd -0.1 v dd -0.02 v od?pin?output??l??voltage v ol2 0.01 0.1 v 0?v?battery?charge?starting?charger voltage v ocha sc121na 1.55 v pin?configuration pin?descriptions pin?no. symbol i/o description 1 od o fet?gate?connection?pin?for?discharge?control. 2 csi i/o input?pin?for?current?sense,?charger?detect. 3 oc o fet?gate?connection?pin?for?charge?control. 4 td i test?pin?for?reduce?delay?time. 5 v dd i positive?power?input?pin. 6 v ss i negative?power?input?pin.
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?9 function?descriptions normal?status if?v odl v oi1 ?occurs,?m2?is?to?be?turned on?and?back?to?normal?status. over?discharge?detection when?enter?discharging?from?normal?status,?the?battery?voltage?can?be?detected?from?v dd .?when?the?battery?is in? over? discharge? status,? v dd ?is?smaller?than?v odl ? over? a? delay? time? of? tod;? m1? is? to? be? turned? off.? in? the meanwhile,?csi?is?pulled?to?v dd ?by?way?of?internal?resistor?rcsid.?if?v cs i>v oi2 ,?the? protection?ic? enters?into power-down?mode.?(its?current?consumption?is?lower?than?0.3 m a). release?of?power-down?mode a?charger?is?connected?while?the?battery?remains?in?power-down?mode.?if?v ch v odr ?occurs,?m1?is?to?be?turned?on?and?back?to normal?status. charger?detection if?a?charger?is?connected?to?the?battery?remained?in?power-down?mode,?the?voltages?will?become?v csi v odl .?m1?is?to?be?turned?on?and?back?to?normal?status. abnormal?charging?status if?a?charger?is?connected?to?the?battery?in?normal?status,?v csi sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?9 timing?diagram overcharge?status ? self?discharging ? normal?status charger?load v ocu v ocr v odr v odl v dd csi v dd v ss v dd v ss v ch toc self?discharging overcharge?status ? load?discharging ? normal?status
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?9 overcharge?status ? charging?by?charger ? normal?status overcharge?status ? abnormal?status ? normal?status charger?load v ocu v ocr v odr v odl v dd csi b a t t e r y v o l t a g e o c p i n v dd v ss o d p i n v dd v ss v ch c s i p i n tod v oi 2 toc
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?9 over?current?status ? normal?status state?diagram?of?operation
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?9 typical?application?circuits note:? the? circuit? and? parameters? are? reference? only,? please? set? the? parameters? of? the? real? application circuit?based?on?the?real?test.
sc121 hangzhou?microelectronics?co.,ltd ?rev:1.6??????2009.07.20 http://?www.silan.com.cn ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?9 package?outline sot-23-6 unit:?mm handling?mos?devices: electrostatic?charges?can?exist?in?many?things.?all?of?our?mos?devices?are?internally?protected?against electrostatic?discharge?but?they?can?be?damaged?if?the?following?precautions?are?not?taken: persons?at?a?work?bench?should?be?earthed?via?a?wrist?strap. equipment?cases?should?be?earthed. ? all?tools?used?during?assembly,?including?soldering?tools?and?solder?baths,?must?be?earthed. mos?devices?should?be?packed?for?dispatch?in?antistatic/conductive?containers. disclaimer: silan?reserves?the?right?to?make?changes?to?the?information?herein? for?the?improvement?of?the?design? and?performance without?further?notice! all?semiconductor?products?malfunction?or?fail?with?some?probability?under?special?conditions.?when?using?silan?products in? system? design? or? complete? machine? manufacturing,? it? is? the? responsibility? of? the? buyer? to? comply? with? the? safety standards?strictly?and?take?essential?measures?to?avoid?situations?in?which?a?malfunction?or?failure?of?such?silan?products could?cause?loss?of?body?injury?or?damage?to?property. silan?will?supply?the?best?possible?product?for?customers!
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