S-8241ABRMC-GBRT2G SII [Seiko Instruments Inc], S-8241ABRMC-GBRT2G Datasheet - Page 22

• Manufacturer Part Number: S-8241ABRMC-GBRT2G
• Description: BATTERY PROTECTION IC FOR 1-CELL PACK
• Manufacturer: SII [Seiko Instruments Inc]

22
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
8. 0 V Battery Charging Function
9. 0 V Battery Charge Inhibiting Function
Caution 1. Some battery providers do not recommend charging of completely discharged batteries. Please
Caution 1. Some battery providers do not recommend charging of completely discharged batteries. Please
This function enables the charging of a connected battery whose voltage is 0 V by self-discharge. When a charger
having 0 V battery start charging charger voltage (V
charging control FET gate is fixed to V
control FET becomes equal to or higher than the turn-on voltage by 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. If the battery voltage becomes equal to or higher than the
overdischarge release voltage (V
This function forbids the charging of a connected battery which is short-circuited internally (0 V battery). When the
battery voltage becomes 0.9 V (typ.) or lower, the charging control FET gate is fixed to EB- potential to forbid charging.
Charging can be performed, when the battery voltage is the 0 V battery charge inhibiting voltage (V
2. <For products with power-down function>
2. The 0 V battery charging function has higher priority than the abnormal charge current detection
3. When a battery is connected to the IC for the first time, the IC may not enter the normal condition
2. When a battery is connected to the IC for the first time, the IC may not enter the normal condition
<For products without power-down function>
After having detected an overcurrent (overcurrent 1, overcurrent 2, short-circuiting), the state is
held for the overdischarge detection delay time or longer without releasing the load, the condition
changes to the power-down condition when the battery voltage drops below the overdischarge
detection voltage. If the battery voltage drops below the overdischarge detection voltage due to
overcurrent, the discharging control FET is turned off when the overcurrent is detected. If the
battery voltage recovers slowly and if the battery voltage after the overdischarge detection delay
time is equal to or lower than the overdischarge detection voltage, the S-8241 changes to the
power-down condition.
After having detected an overcurrent (overcurrent 1, overcurrent 2, short-circuiting), the state is
held for the overdischarge detection delay time or longer without releasing the load, the condition
changes to the overdischarge condition when the battery voltage drops below the overdischarge
detection voltage. If the battery voltage drops below the overdischarge detection voltage due to
overcurrent, the discharging control FET is turned off when the overcurrent is detected. If the
battery voltage recovers slowly and if the battery voltage after the overdischarge detection delay
time is equal to or lower than the overdischarge detection voltage, the S-8241 changes to the
overdischarge condition.
refer to battery providers before the selection of 0 V battery charging function.
function. Consequently, a product with the 0 V battery charging function charges a battery and
abnormal charge current cannot be detected during the battery voltage is low (at most 1.8 V or
lower).
in which discharging is possible. In this case, set the VM pin voltage equal to the V
(short the VM and VSS pins or connect a charger) to enter the normal condition.
refer to battery providers before the selection of 0 V battery charging function.
in which discharging is possible. In this case, set the VM pin voltage equal to the V
(short the VM and VSS pins or connect a charger) to enter the normal condition.
DU
), the normal condition returns.
DD
potential. When the voltage between the gate and the source of the charging
Seiko Instruments Inc.
0CHA
) or higher is connected between EB+ and EB- pins, the
0INH
) or higher.
Rev.7.6
SS
SS
voltage
voltage
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