Datasheet

BATTERY PROTECTION IC FOR SINGLE-CELL PACK
S-8261 Series
Rev.4.1_00
Seiko Instruments Inc.
24
 Timing Chart
(1) Overcharge and Overdischarge Detection
V
DL
+
V
HD
V
DL
V
DD
V
SS
(2)
(1)
(1)
(1)
(3)
Battery
voltage
DO pin
CO pin
VM pin
Charger connection
Load connection
Mode
Overdischarge detection delay time (t
DL
)
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Overcharge detection delay time (t
CU
)
V
DD
V
DD
V
IOV1
V
SS
V
CHA
V
SS
V
CU
V
CU
–V
HC
Figure 7
(2) Overcurrent Detection
V
CU
V
CU
−V
HC
V
DL
+V
HD
V
DL
V
DD
V
SS
V
DD
V
SS
(1)
(4)
(1)
(4)
(1)
(4)
(1)
V
DD
V
SHORT
V
IOV2
V
IOV1
V
SS
Overcurrent 1 detection delay time (t
IOV1
) Overcurrent 2 detection delay time (t
IOV2
) Load short-circuiting detection delay time (t
SHORT
)
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 8