S-8204BAB-TCT1Y Datasheet, PDF (20/36 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC

BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204B Series
 Timing Chart (Circuit in Figure 11)
1. Overcharge detection and overdischarge detection (with power-down function)
V_CUn
V_CLn
Battery voltage
V_DUn
V_DLn
(n = 1 to 4)
V_DD
DOP pin voltage
V_SS
V_DD
COP pin voltage
High-Z
High-Z
V_EB-
Rev.3.9_00
V_DD
39 / 40 × V_DD
VMP pin voltage 1 / 2 × V_DD
V_SS
Charger connection
Load connection
Status^*1
Overcharge detection
delay time (t_CU)
(1)
(2)
*1. (1): Normal status
(2): Overcharge status
(3): Overdischarge status
(4): Power-down status
Overdischarge detection
delay time (t_DL)
(1)
(3)
(4) (3)
(1)
Remark The charger is assumed to charge with a constant current. V_EB- indicates the open voltage of the charger.
Figure 8
20