BATTERY PROTECTION IC FOR SINGLE-CELL PACK
S-8261 Series
Rev.1.9_00
Operation Timing Chart
1. Overcharge and Overdischarge Detection
VCU
V
CU–VHC
Battery
voltage
V
DL+VHD
VDL
VDD
DO pin
CO pin
VSS
VDD
VSS
VDD
VM pin
VIOV1
VSS
VCHA
Charger connection
Load connection
Overcharge detection delay time (tCU
)
Overdischarge detection delay time (tDL
)
Mode
(1)
(3)
(1)
(2)
(1)
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Figure 7
2. Overcurrent Detection
VCU
V
CU−VHC
Battery
voltage
VDL+VHD
VDL
VDD
DO pin
CO pin
VSS
VDD
VSS
VDD
VSHORT
VM pin
VIOV2
VIOV1
VSS
Charger connection
Load connection
Overcurrent 1 detection delay time (tIOV1
)
Overcurrent 2 detection delay time (tIOV2
(1) (1)
)
Load short-circuiting detection delay time (tSHORT
)
Mode
(1)
(4)
(4)
(4)
(1)
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Figure 8
22
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
