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

• Manufacturer Part Number: s-8261aaj
• Description: Battery Protection Ic For 1-cell Pack
• Manufacturer: Seiko Instruments Inc.

20
BATTERY PROTECTION IC FOR 1-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
below the overdischarge detection voltage (V
detection voltage (V
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
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
falls below overdischarge detection voltage (V
detection voltage (V
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
voltage (V
DL
DL
) without releasing the load, the status changes to the power-down status when the battery voltage falls
) without released the load, the status changes to the overdischarge status when the battery voltage
IOV1
), the S-8261 Series turns the FET off within t
DO pin
VM pin
DL
DL
), the S-8261 Series shifts to the power-down status.
), S-8261 Series shifts to the overdischarge status.
Overcurrent 2 detection delay time (t
IOV1
DL
DL
) is detected. When the overcurrent 2 (V
V
V
V
V
V
V
) due to the overcurrent, the S-8261 Series turns the discharging control FET off by
) due to the overcurrent, the S-8261 Series turns the discharging control FET off by
DD
SS
DD
IOV2
IOV1
SS
Seiko Instruments Inc.
DL
). When the battery voltage falls below the overdischarge
DL
Figure 5
IOV2
).When the battery voltage falls below overdischarge
IOV2
) and load short-circuiting (t
IOV2
DL
DL
or t
)
) is still lower than the overdischarge detection
) is still lower than the overdischarge detection
IOV2
SHORT
or t
IOV2
of each detection.
SHORT
t
D
) or load short-circuiting (V
) after the detection of overcurrent
0
t
D
t
IOV2
SHORT
Time
Time
) start when the
Rev.4.6
SHORT
_00
) is