SA1412 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2007.09.28 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?5 two?cell?li + ?battery?protection?circuit tssop-8-225-0.65 descriptions SA1412? protects? for? lithium-ion? batteries.? when? the? lithium- ion batteries? is?in? state? of? overcharge,? overdischarge? and? overcurrent.? the ic?turns?off?the?external?mosfet?to?protect?the?batteries. features *?overcharge?consumption?current(v cell =4.5v?roc=270k
):?150 m a *?normal?consumption?current(v cell =3.5v):?18 m a *?overcharge?consumption?current(v cell =1.9v):?0.5 m a overcharge?consumption?current(v cell =1.0v):?0.1 m a applications *?digital?camer *?digital?vidicon *?special?illumination *?portable?dvd *?pda *?interphone *?7.2v?large?capacity?battery. ordering?information device package SA1412 tssop-8-225-0.65 products?catalog part?no. overcharge detection voltage overcharge detection hysteresis voltage overdischarge detection voltage overdischarge release voltage overcurrent detection voltage SA1412a 4.3500.025v 22050mv 2.30.1v 3.50.2v 15015mv SA1412b 4.3000.025v 22050mv 2.30.1v 3.50.2v 15015mv SA1412c 4.2500.025v 22050mv 2.30.1v 3.50.2v 15015mv SA1412d 4.3000.025v 20050mv 2.50.1v 3.00.1v 7515mv
SA1412 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2007.09.28 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?5 block?diagram absolute?maximum?rating characteristics symbol rating unit supply?voltage v cc?max -0.3~18 v cs?pin?voltage v csmax -0.6~v cc v oc?pin?voltage v ocmax -0.6~v cc v allowable?dissipation p d 300 mv storage?temperature?range t stg -40~125 c operating?temperature?range t amb -20~70 c electrical?characteristics (unless?otherwise?specified,?take?SA1412b?for?instance,?t amb =25 c) characteristics symbol test?condition min. typ. max. unit overcharge?detection?voltage v oc t amb =-20 c?~70 c; 4.275 4.300 4.325 v overcharge? detection? hysteresis voltage ? v oc 170 220 270 mv overdischarge?detection?voltage v od 2.20 2.30 2.40 v consumption?current?1 i vh1 v h =v l =1.0v,?v cs =1.4v -- -- 0.1 m a consumption?current?2 i vh2 v h =v l ?=1.9v,?vcs=3.2v -- 0.5 0.8 m a consumption?current?3 i vh3 v h =v l ?=3.5v -- 18.0 23.0 m a consumption?current?4 i vh4 v h =v l ?=4.5v,roc=270?k w -- 150 -- m a vl?pin?input?current i vl v h =v l ?=3.5v -0.3 0 0.3 m a overdischarge?release?voltage v df discharge?resume?by voltage?rise 3.3 3.5 3.7 v gd?pin?h?output?voltage v gdh ?v h =v l ?=3.5v,?i l =-10a v h -0.3 v h -0.2 -- v gd?pin?l?output?voltage v gdl ?v h =v l ?=3.5v,?i l =10a -- 0.2 0.3 v (to?be?continued)
SA1412 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2007.09.28 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?5 (continued) characteristics symbol test?condition min. typ. max. unit oc?pin?output?current i och v h =v l ?=4.5v 30 150 -- m a overcurrent?detection?threshold value v cs1 135 150 165 mv overcurrent?short?threshold?value v cs2 0.35 0.45 0.55 v overcurrent?release load? release:? load? of? 5m w ? or? more? between? both? battery pack?pins overcurrent?detection?delay?time?1 t oc1 7 12 18 ms overcurrent?detection?delay?time?2 t oc2 -- 30 100 m s overdischarge?detection?delay time t od 8 13 20 ms overcharge?detection?dead?time t och c tc =0.18uf 0.5 1.0 1.5 s start-up?voltage v st v h =v l =2.5v -0.24 -0.12 -0.04 v pin?descriptions pin?description pin?no. pin?name i/o description 1 oc o overcharge?detection?output?pin 2 gd o discharge?control?fet?(n-ch)?control?output?pin 3 cs i overcurrent?detection?input?pin 4 gnd -- ground?pin,?or?lower?cell?load?negative?pole?input?pin. 5 td -- overcharge?detection?dead?time?setting?pin 6 vl -- connection?pin?for?lower?cell?positive?electrode?side?and?upper?cell negative?electrode?side. 7 v cc -- power?supply?input?pin 8 vh -- upper?cell?positive?electrode?input?pin function?description this?ic?is?a?lithium?ion?battery?(2-cell?in-series?type)?protection?ic.?it?has?functions?below:?overcharge?detection, overdischarge? detection,? overcurrent? detection.? it?controls?the? batteries? charging? or? discharging? by?control?the
SA1412 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2007.09.28 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?5 external?mosfet?off?and?on.?there?are?four?opration?modes?as?follows: 1. overcharge?mode: the?battery?voltage?of?either?the?h?or?l?cell?goes?above?overcharge?detection?voltage.?the?ic?shuts?down?the charging?loop.detection?operation?delay?for?overcharge?detection?can?be?set?with?the?dead?time?setting?pin. 2. normal?mode the? battery? voltage? of? both? h? and? l? cells? is? above? overdischarge? detection? voltage? and? below? overcharge detection?voltage. 3. overdischarge?mode the? battery? voltage? of? either?the? h? or?l?cell? drops? below? overdischarge? detection? voltage.? the? ic? shuts? down the?discharging?loop.dead?time?for?overdischarge?detection?is?set?internally. 4. overcurrent?mode the?voltage?between?cs-gnd?goes?above?overcurrent?detection?voltage?during?discharge.?the?ic?shuts?down the?discharging?loop. test?circuit
SA1412 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2007.09.28 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?5 typical?application?circuit note:the? circuit? and? parameters? are? reference? only,? please? set? the? parameters? of? the? real? application? circuit based?on?the?real?test?. package?outline tssop-8-225-0.65???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????unit:?mm
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