s-8211caj-m5t1g Seiko Instruments Inc., s-8211caj-m5t1g Datasheet - Page 21

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

Rev.5.0
5. Charge Overcurrent Status
6. 0 V Battery Charging Function “Available”
7. 0 V Battery Charging Function “Unavailable”
When a battery in the normal status is in the status where the voltage of the VM pin is lower than the charge
overcurrent detection voltage because the charge current is higher than the specified value and the status lasts for
the charge overcurrent detection delay time, the charge control FET is turned off and charging is stopped. This
status is called the charge overcurrent status.
This IC will be restored to the normal status from the charge overcurrent status when, the voltage at the VM pin
returns to charge overcurrent detection voltage (V
The charge overcurrent detection function does not work in the overdischarge status.
The resistance (R
are not connected in the charge overcurrent status.
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 (V
8211C Series enters the normal status.
Caution 1. Some battery providers do not recommend charging for a completely self-discharged battery.
This function inhibits recharging when a battery that is internally short-circuited (0 V battery) is connected. When the
battery voltage is the 0 V battery charge inhibition battery voltage (V
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.
_00
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charging
function.
0INH
2. The 0 V battery charge function has higher priority than the charge overcurrent detection
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery
charging function.
function. Consequently, a product in which use of the 0 V battery charging function is enabled
charges a battery forcibly and the charge overcurrent cannot be detected when the battery
voltage is lower than overdischarge detection voltage (V
) or higher, charging can be performed.
VMD
) between the VM pin and VDD pin, and the resistance (R
Seiko Instruments Inc.
0CHA
) or a higher voltage is applied between the EB+ and EB− pins by
BATTERY PROTECTION IC FOR 1-CELL PACK
CIOV
) or higher by removing the charger.
0INH
) or lower, the charging control FET gate is
DL
).
VMS
) between the VM pin and VSS pin
S-8211C Series
DU
), the S-
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