S-8253A Datasheet, PDF (19/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK

Rev.3.7_00
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
„ Timing Chart
1. Overcharge Detection and Overdischarge Detection
Battery
V_CUn
V_CLn
voltage
V_DUn
V_DLn
(n = 1 to 3)
V_HC
V_HD
V_DD
DOP
pin voltage
V_SS
V_EB+
COP
pin voltage
V_SS
High-Z
High-Z
V_EB+
VMP
V_DD
V_IOV1
pin voltage
0.8 V
V_SS
Charger
connection
Load
connection
Mode^*1
Overcharge detection
delay time ( t_CU )
<1>
<2>
*1. < 1 > : Normal mode
< 2 > : Overcharge mode
< 3 > : Overdischarge mode
Overdischarge detection
delay time ( t_DL )
<1>
<3>
<1>
Remark The charger is assumed to charge with a constant current. V_EB+ indicates the open voltage of the charger.
Figure 11
Seiko Instruments Inc.
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