s-8211das-m5t1g Seiko Instruments Inc., s-8211das-m5t1g Datasheet - Page 18

• Manufacturer Part Number: s-8211das-m5t1g
• Description: Battery Protection Ic For 1-cell Pack
• Manufacturer: Seiko Instruments Inc.

18
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8211D Series
8. Delay Circuit
The detection delay times are determined by dividing a clock of approximately 3.5 kHz by the counter.
Remark1. The discharge overcurrent detection delay time (t
2. With shutdown function
(t
circuiting detection voltage (V
after the detection of discharge overcurrent detection voltage (V
control FET off within t
When any overcurrent is detected and the overcurrent continues for longer than the overdischarge
detection delay time (t
the point where the battery voltage falls below overdischarge detection voltage (V
When the battery voltage falls below overdischarge detection voltage (V
8211D Series turns the discharging control FET off via 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 is
still lower than the overdischarge detection voltage, S-8211D Series shifts to the power-down status.
Without shutdown function
When any overcurrent is detected and the overcurrent continues for longer than the overdischarge
detection delay time (t
at the point where the battery voltage falls below overdischarge detection voltage (V
When the battery voltage falls below overdischarge detection voltage (V
8211D Series turns the discharging control FET off via 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 is
still lower than the overdischarge detection voltage, S-8211D Series shifts to the overdischarge status.
SHORT
DO Pin
VM Pin
) start when the discharge overcurrent detection voltage (V
V
V
V
V
V
V
Load short-circuiting detection delay time (t
SHORT
DD
SS
DD
DIOV
SS
DL
DL
SHORT
) without the load being released, the status changes to the power-down status at
) without the load being released, the status changes to the overdischarge status
from the time of detecting V
SHORT
Seiko Instruments Inc.
) is detected over the load short-circuiting detection delay time (t
Figure 10
DIOV
SHORT
) and the load short-circuiting detection delay time
)
SHORT
t
D
.
DIOV
DIOV
0 ≤ t
), the S-8211D turns the discharging
) is detected. When the load short-
D
≤ t
DL
DL
SHORT
) due to overcurrent, the S-
) due to overcurrent, the S-
Time
Time
DL
).
DL
).
Rev.4.6
SHORT
_00
)