Datasheet

BATTERY PROTECTION IC FOR SINGLE-CELL PACK
Rev.4.1_00
S-8261 Series
Seiko Instruments Inc.
25
(3) Charger Detection
V
CU
V
CU
−V
HC
V
DL
+V
HD
V
DL
V
DD
V
SS
V
DD
V
SS
V
DD
V
SS
V
CHA
Overdischarge detection delay time (t
DL
)
In case VM pin voltage < V
CHA
Overdischarge is released at the overdischarge
detection voltage (V
DL
)
(1)
(3)
(1)
Battery
voltage
DO pin
CO pin
VM pin
Charger connection
Load connection
Mode
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Figure 9
(4) Abnormal Charge Current Detection
Abnormal charging current detection delay time
( = Overcharge detection delay time (t
CU
))
Overdischarge detection delay time (t
DL
)
(3) (1) (2)
(1)
(1)
Battery
voltage
DO pin
CO pin
VM pin
Charger connection
Load connection
Mode
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
V
CU
V
CU
−V
HC
V
DL
+V
HD
V
DL
V
DD
V
SS
V
DD
V
SS
V
DD
V
SS
V
CHA
Figure 10