S-8254A 查看數據表（PDF） - Seiko Instruments Inc

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S-8254A

BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK

Seiko Instruments Inc 

Rev.5.2_00

BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK

S-8254A Series

 Timing Chart

1. Overcharge Detection and Overdischarge Detection

VCUn

VCLn

Battery voltage

VDUn

VDLn

(n = 1 to 4)

VDD

DOP pin voltage

VSS

VEB+

COP pin voltage

VSS

High-Z

High-Z

VEB+

VDD

39 / 40×VDD

VMP pin voltage

1 / 2×VDD

VSS

Charger connection

Load connection

Overcharge detection delay time (tCU)

Status*1

<1>

<2>

*1. < 1 > : Normal status

< 2 > : Overcharge status

< 3 > : Overdischarge status

< 4 > : Power-down status

Overdischarge detection delay time (tDL)

<1>

<4>

<1>

<3>

Remark The charger is assumed to charge with a constant current. VEB+ indicates the open voltage of

the charger.

Figure 9

17

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