AP31261

Document number: DS37514 Rev. 2 - 2

2 of 13

www.diodes.com

May 2015

© Diodes Incorporated

AP31261

A Product Line of

Diodes Incorporated

Typical Applications Circuit

VCC

GND

GATE

FB

SENSE

CTRL

AZ431

AP31261

L2

T1

R13

C7

C6

C8

R14

R15

R16

R17

R18

C9

C10

R12

R11

R10

R9

C5

R6

R19

C4

R5

R4

C2

C1

VR1

U1

NTC

R2

R3

R7

C3

C11

NTC

R8

Pin Descriptions

Pin Number

Pin Name

Function

1

GND

Signal ground. Current return for driver and control circuits

2

FB

Feedback. Directly connected to the opto-coupler

3

CTRL

Latch trigger if this pin voltage drops below a threshold or over another threshold, leave CTRL pin

open if this function is not needed. Connecting a NTC thermistor to GND can achieve OTP

protection

4

SENSE

Current Sense

5

VCC

Supply voltage of driver and control circuits

6

GATE

Gate driver output