s-8261aajmd Seiko Instruments Inc., s-8261aajmd Datasheet - Page 21

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

Rev.4.4
8. DP Pin
9. 0 V Battery Charging Function “Available”
10. 0 V Battery Charging Function “Unavailable”
The DP pin is a test pin for delay time measurement and it should be open in the actual application. If a capacitor
whose capacitance is larger than 1000 pF or a resistor whose resistance is less than 1 MΩ is connected to this pin,
error may occur in the delay times or in the detection voltages.
This function is used to recharge the connected battery whose voltage is 0 V due to the self-discharge. When the 0 V
battery charge starting charger voltage (V
charger, the charging control FET gate is fixed to VDD pin voltage. When the voltage between the gate and source of
the charging control FET becomes equal to or higher than the turn-on voltage due to the charger voltage, the charging
control FET is turned on to start charging. At this time, the discharging control FET is off and the charging current
flows through the internal parasitic diode in the discharging control FET. When the battery voltage becomes equal to
or higher than the overdischarge detection voltage (V
Series enters the normal condition.
Caution
Remark
This function inhibits the recharging when a battery that is short-circuited (0 V battery) internally is connected. When
the battery voltage is the 0 V battery charge inhibition battery voltage (V
fixed to EB− pin voltage to inhibit charging. When the battery voltage is the 0 V battery charge inhibition battery
voltage (V
Caution
_00
0INH
Some battery providers do not recommend charging for completely self-discharged battery. Please
ask battery providers before determine whether to enable or inhibit the 0 V battery charging
function.
The 0 V battery charge function has higher priority than the abnormal charge current detection function.
Consequently, a product with the 0 V battery charging function is enabled charges a battery forcibly and
abnormal charge current cannot be detected when the battery voltage is low.
Some battery providers do not recommend charging for completely self-discharged battery. Please
ask battery providers before determining the 0 V battery charging function.
) or higher, charging can be performed.
BATTERY PROTECTION IC FOR SINGLE-CELL PACK
0CHA
Seiko Instruments Inc.
) or higher is applied between EB+ pin and EB− pin by connecting a
DL
) and the overdischarge hysteresis voltage (V
0INH
) or lower, the charging control FET gate is
S-8261 Series
HD
), the S-8261
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