s-8211dat-i6t1g Seiko Instruments Inc., s-8211dat-i6t1g Datasheet - Page 18

• Manufacturer Part Number: s-8211dat-i6t1g
• Description: Battery Protection Ic For 1-cell Pack
• Manufacturer: Seiko Instruments Inc.

18
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8211D Series
5. Detection for irregular charging current
6. 0 V Battery Charging Function “Available”
7. 0 V Battery Charging Function “Unavailable”
During charging a battery which is in the normal status, if the VM pin voltage becomes lower than the charger
detection voltage (V
off the charge-control FET to stop charging. This is detection for irregular charging current.
This function works in the case that the DO pin voltage is in “H”, and the VM pin voltage becomes lower than the
charger detection voltage (V
S-8211D turns off the charge-control FET to stop charging; the DO pin voltage goes in “H” so that the battery voltage
becomes higher than the overdischarge detection voltage, and after the overcharge detection delay time (t
The status irregular charging current detection is released by the lower potential difference between the VM and VSS
pin than the charger detection voltage (V
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
8211D Series enters the normal status.
Caution 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.
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charging
function.
Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charging
function.
0INH
) or higher, charging can be performed.
CHA
) and this status is held longer than the overcharge detection delay time (t
CHA
). Thus if the irregular charger current flows in the battery in the overdischarge status,
CHA
Seiko Instruments Inc.
0CHA
).
) or a higher voltage is applied between the EB and EB pins by
0INH
) or lower, the charging control FET gate is
CU
), S-8211D turns
Rev.4.9
cu
DU
).
), the S-
_00