AP3783

Document number: DS37429 Rev. 8 - 2

2 of 17

www.diodes.com

December 2017

© Diodes Incorporated

AP3783

Typical Applications Circuit

FR1

Da

T1

D1

FB

DRI

CPC

CS

U1

GND

VCC

Q1

12V/1.5A

5V/2A

C2

R2

R0

R1

C1

D

CY1

AP3783

Np

Ns

Na

+

+

+

+

+

Ra

1

2

3

4

5

6

Dg

Rg

Pin Descriptions

Pin Number

Pin Name

Function

1

CS

The CS is the current sense pin of the IC. The IC will turn off the power MOSFET

according to the voltage on the CS pin

2

GND

The ground of the controller

3

VCC

The VCC pin supplies the power for the IC. In order to get the correct operation of

the IC, a capacitor with low ESR should be placed as close as possible to the VCC

pin

4

FB

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

5

DRI

Output pin to drive external MOSFET

6

CPC

A capacitor about 50nF should be connected to this pin. The voltage of CPC pin is

linear to load of the system and it is used for the functions of cable voltage drop

compensation and audio noise suppression