S-8253A Datasheet, PDF (20/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Rev.3.7_00
2. Overcurrent Detection
V_HC
V_CUn
Battery
V_CLn
voltage
V_DUn
V_DLn
(n = 1 to 3)
V_HD
V_DD
DOP
pin voltage
V_SS
V_EB+
COP
pin voltage
V_SS
V_DD
V_IOV1
VMP
V_IOV2
pin voltage ^VIOV3
V_SS
Load
connection
High-Z
Overcurrent detection
delay time 1 ( t_IOV1 )
High-Z
High-Z
Overcurrent detection
delay time 2 ( t_IOV2 )
Overcurrent detection
delay time 3 ( t_IOV3)
Mode^*1
<1>
*1. < 1 > : Normal mode
< 2 > : Overcurrent mode
<2>
<1>
<2> <1> <2> <1>
Remark The charger is assumed to charge with a constant current. V_EB+ indicates the open voltage of the charger.
Figure 12
20
Seiko Instruments Inc.