s-8261aajmd Seiko Instruments Inc., s-8261aajmd Datasheet - Page 20

• Manufacturer Part Number: s-8261aajmd
• Description: Battery Protection Ic For Single-cell Pack
• Manufacturer: Seiko Instruments Inc.

20
BATTERY PROTECTION IC FOR SINGLE-CELL PACK
S-8261 Series
7. Delay Circuits
The detection delay times are determined by dividing a clock of the approximately 3.5 kHz with the counter.
Remark 1. The detection delay time for overcurrent 2 (t
2. For products with power-down function
(t
voltage falls below the overdischarge detection voltage (V
overdischarge detection voltage (V
control FET off by the overcurrent detection. In this case if the recovery of the battery voltage is so slow
that the battery voltage after the overdischarge detection delay time (t
overdischarge detection voltage (V
overcurrent 1 (V
detected over the detection delay time for each of them (= t
1 (V
When the overcurrent is detected and continues for longer than the overdischarge detection delay time
For products without power-down function
When the overcurrent is detected and continues for longer than the overdischarge detection delay time
(t
voltage falls below overdischarge detection voltage (V
overdischarge detection voltage (V
control FET off by the overcurrent detection. In this case, if the recovery of the battery voltage is so slow
that the battery voltage after the overdischarge detection delay time (t
overdischarge detection voltage (V
DL
DL
) without releasing the load, the condition changes to the power-down condition when the battery
) without released the load, the condition changes to the overdischarge condition when the battery
IOV1
), the S-8261 Series turns the FET off within t
DO pin
VM pin
Overcurrent 2 detection delay time (t
IOV1
) is detected. When the overcurrent 2 (V
V
V
V
V
V
V
DD
SS
DD
IOV2
IOV1
SS
Seiko Instruments Inc.
DL
DL
DL
DL
), the S-8261 Series shifts to the power-down condition.
), S-8261 Series shifts to the overdischarge condition.
) due to the overcurrent, the S-8261 Series turns the discharging
) due to the overcurrent, the S-8261 Series turns the discharging
Figure 5
IOV2
IOV2
) and load short-circuiting (t
IOV2
or t
)
DL
IOV2
SHORT
DL
). When the battery voltage falls below the
).When the battery voltage falls below
or t
IOV2
of each detection.
SHORT
t
D
) or load short-circuiting (V
) after the detection of overcurrent
0 ≤ t
DL
DL
D
≤ t
) is still lower than the
) is still lower than the
IOV2
SHORT
Time
Time
) start when the
Rev.4.4
SHORT
_00
) is