S-8259AAA-M6T1U Datasheet, PDF (11/21 Pages) Seiko Instruments Inc – BATTERY MONITORING IC FOR 1-CELL PACK

Rev.1.0_02
BATTERY MONITORING IC FOR 1-CELL PACK
S-8259A Series
 Operation
Remark Refer to " Connection Example".
1. Normal status
The S-8259A Series monitors the voltage of the battery connected between VDD pin and VSS pin to control charging
and discharging. When the battery voltage is in the range from overdischarge detection voltage (VDL) to overcharge
detection voltage (VCU), CO pin and DO pin both output the VDD pin level. This condition is called the normal status.
2. Overcharge status
When the battery voltage becomes higher than VCU during charging in the normal status and the condition continues for
the overcharge detection delay time (tCU) or longer, CO pin outputs the VM pin level. This condition is called the
overcharge status.
When the battery voltage falls below the overcharge release voltage (VCL) and the condition continues for the
overcharge release delay time (tCL) or longer, the S-8259A Series releases the overcharge status.
3. Overdischarge status
When the battery voltage falls below VDL during discharging in the normal status and the condition continues for the
overdischarge detection delay time (tDL) or longer, DO pin outputs the VSS pin level. This condition is called the
overdischarge status.
When the battery voltage exceeds the overdischarge release voltage (VDU), the S-8259A Series releases the
overdischarge status.
11