S-8253A SII [Seiko Instruments Inc], S-8253A Datasheet - Page 17

• Manufacturer Part Number: S-8253A
• Description: BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
• Manufacturer: SII [Seiko Instruments Inc]

Rev.3.7
5. Overcurrent Status
6. 0 V Battery Charge Function
The S-8253A/B Series has three overcurrent detection levels (V
delay times (t
becomes higher than the specified value (the difference of the voltages of the VMP pin and VDD pin is greater than
V
pin voltage becomes V
impedance and is pulled up to the EB+ pin voltage to turn off the charging FET to stop charging, and the VMP pin is
pulled up to the V
and overcurrent detection delay times 2, 3 (t
The overcurrent status is released when the following condition holds.
Caution The impedance that enables automatic restoration varies depending on the battery voltage and set
Regarding the charging of a self-discharged battery (0 V battery), the S-8253A/B Series has two functions from which
one should be selected.
Caution When the VDD pin voltage is lower than the minimum value of V
IOV1
(1) The VMP pin voltage is V
(1) 0 V battery charging is allowed (0 V battery charging is available.)
(2) 0 V battery charging is prohibited (0 V battery charging is unavailable.)
_00
) and the state continues for t
When the charger voltage is higher than V
When one of the battery voltages is lower than V
value of overcurrent detection voltage 1.
Series is not guaranteed.
IOV1
, t
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
DD
IOV2
voltage by the internal resistor (R
, and t
DD
level to turn off the discharging FET to stop discharging, the COP pin becomes high
IOV3
) corresponding to each overcurrent detection level. When the discharging current
DD
IOV1
− V
or longer, the S-8253A/B Series enters the overcurrent status, in which the DOP
IOV1
Seiko Instruments Inc.
or higher because a charger is connected or the load is released.
IOV2
, t
IOV3
0CHA
) are the same as for V
VMD
, the 0 V battery can be charged.
). Operation of overcurrent detection levels 2, 3 (V
0INH
, the 0 V battery cannot be charged.
IOV1
, V
IOV2
, and V
IOV1
DSOP
and t
IOV3
, the operation of the S-8253A/B
) and three overcurrent detection
IOV1
.
S-8253A/B Series
IOV2
, V
IOV3
17
)