AP3790

Document number: DS37221 Rev. 3 - 2

2 of 17

www.diodes.com

October 2014

© Diodes Incorporated

AP3790

A Product Line of

Diodes Incorporated

Typical Applications Circuit

+

C1

FR1

+

C2

L1

TR1

D1

+

FB

R13

OUT

VCC

R2

R14

AP3790

CPC

GND

C6

R3

R4

Q1

5V/1A

C3

D4~D7

L2

R12

C7

D2

+

C4

D3

C5

R11

CS

R1

R10

2

1

5

3

7

4

6

8

Pin Descriptions

Pin Number

Pin Name

Function

1

CPC

A capacitor is connected to this pin to form a low pass filter for cable voltage drop

compensation, audio noise suppression and detecting the patterns of load current to

change the output voltage and current

2

GND

The ground of the controller

3

FB

The CV and CC regulation are realized base on the voltage sampling of this pin

4

VCC

VCC supply pin for the controller. A capacitor with low ESR should be placed as

close as possible to this pin

5

CS

Current senses pin of IC. The CS pin will turn off the power transistor when the CS

pin voltage reaches turn off threshold.

7

OUT

The OUT pin is used to drive the external power transistor

6, 8

NC

Not connected