AP431AW View Datasheet(PDF) - Anachip Corporation

Part Name

Description

Manufacturer

AP431AW

Adjustable Precision Shunt Regulator

Anachip Corporation 

Adjustable Precision Shunt Regulator

„ Application Examples

VIN

R1A

R1B

VIN

R

AP431/AP431A

RCL IOUT

VIN

R2A

R2B

LED on when Low Limit＜VIN＜High Limit

Low Limit ≈ VREF (1+R1B/R2B)

High Limit ≈ VREF (1+R1A/R2A)

Fig.4 Voltage Monitor

ON +

OFF

Delay

=

RC

x ln(

VIN

VIN

-VREF

)

Fig.5 Delay Timer

IOUT = VREF / RCL

Fig.6 Current Limiter or Current Source

VIN

IOUT

VIN

R1

VOUT

VIN

PUSE

R1

VOUT

RS

IOUT = VREF / RS

Fig.7 Constant-Current Sink

R2

VOUT = (1 + R1/R2) x VREF

Fig.8 Higher-Current Shunt Regulator

R2

LIMIT (1 + R1/R2) x VREF

Fig.9 Crow Bar

VIN

R1A

R1B

+

R2A

R2B

Output ON when

Low Limint < VIN< High Limit

VBE

Low Limit

High Limit

VREF(1 + R1B/R2B) +VBE

VREF(1 + R1A/R2A)

Fig.10 Over-Voltage / Under-Voltage Protection Circuit

Anachip Corp.

www.anachip.com.tw

Rev.1.0 May.7, 2004

9/17

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