S-8242B Seiko Instruments, S-8242B Datasheet - Page 12

• Manufacturer Part Number: S-8242B
• Description: BATTERY PROTECTION IC
• Manufacturer: Seiko Instruments

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12
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242B Series
6. 0 V Battery Charge Function
7. 0 V Battery Charge Inhibition Function
This function is used to recharge a connected battery whose voltage is 0 V due to self-discharge. When the 0 V
battery charge starting charger voltage (V
connecting a charger, the charging control FET gate is fixed to the 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 overdischarge release voltage n (V
S-8242B Series enters the normal status.
Caution
This function inhibits recharging when a battery that is internally short-circuited (0 V) is connected. When the battery
voltage (The voltage between VDD and VSS pins) is the 0 V battery charge inhibition battery voltage (V
the charging control FET gate is fixed to the EB − pin voltage to inhibit charging. When the battery voltage is the 0 V
battery charge inhibition battery voltage (V
Caution Some battery providers do not recommend charging for a completely self-discharged battery.
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charge
function.
Some battery providers do not recommend charging for a completely self-discharged battery.
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charge
function.
0INH
Seiko Instruments Inc.
0CHA
) or higher, charging can be performed.
) or a higher voltage is applied between the EB + and EB − pins by
Rev.1.4
0INH
) or lower,
DUn
), the
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