s-8242bar-t8t1g Seiko Instruments Inc., s-8242bar-t8t1g Datasheet - Page 14

• Manufacturer Part Number: s-8242bar-t8t1g
• Description: Battery Protection Ic For 2-serial-cell Pack
• Manufacturer: Seiko Instruments Inc.

14
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242B Series
8. Delay Circuit
Remark1.
The detection delay times are determined by dividing a clock of approximately 3.5 kHz by the counter.
2.
When the overcurrent is detected and continues for longer than the overdischarge detection delay time
(t
voltage falls below the overdischarge detection voltage n (V
overdischarge detection voltage n (V
control FET off by the overcurrent detection. In this case the recovery of the battery voltage is so slow that
if the battery voltage after the overdischarge detection delay time (t
detection voltage n (V
The overcurrent detection delay time 2 (t
detected. When the overcurrent detection voltage 2 (V
delay time 2 (t
discharging control FET off within t
DL
) without releasing the load, the condition changes to the power-down condition when the battery
DO pin
VM pin
IOV2
V
V
Overcurrent detection delay time 2 (t
V
V
V
V
DD
SS
DD
IOV2
IOV1
SS
) after the detection of overcurrent detection voltage 1 (V
DLn
), the S-8242B Series shifts to the power-down condition.
Seiko Instruments Inc.
IOV2
DLn
from the time of detecting V
) due to the overcurrent, the S-8242B Series turns the discharging
IOV2
Figure 9
) starts when the overcurrent detection voltage 1 (V
IOV2
)
IOV2
DLn
) is detected over the overcurrent detection
t
D
). When the battery voltage falls below the
IOV2
DL
0 ≤ t
) is still lower than the overdischarge
.
D
≤ t
IOV2
IOV1
Time
), the S-8242B turns the
Time
Rev.1.7
IOV1
_00
) is