S8233ACFT-TB Просмотр технического описания (PDF) - Seiko Instruments Inc

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S8233ACFT-TB

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

Seiko Instruments Inc 

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

S-8233A Series

Block Diagram

Rev.3.2_10

VCC

CD1

VC1

CD2

VC2

CD3

VSS

Reference

voltage 1

+

−

Battery 1

Over charge

+

−

Battery 1

Over discharge

Battery 1

Over charge

+

−

Battery 2

Over charge

+

Control

Logic

−

Battery 2

Over discharge

Reference

voltage 2

Battery 2

Over charge

+

−

Battery 3

Over charge

+

−

Battery 3

Over discharge

Reference

voltage 3

Battery 3

Over charge

Figure 1

Over current

2,3 delay

circuit

Over current

detection

circuit

Over current1,

delay circuit

Over discharge

delay circuit

Over charge

delay circuit

Floating

detection circuit

VMP

COVT

CDT

CCT

DOP

COP

CTL

Remark The delay time for over current detection 2 and 3 is fixed by an internal IC circuit. The delay time

cannot be changed via an external capacitor.

2

Seiko Instruments Inc.

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