AP3983R

Document number: DS38247 Rev. 3 - 2

2 of 15

www.diodes.com

June 2016

© Diodes Incorporated

AP3983R

Typical Applications Circuit

Figure 1 Typical Application Circuit of AP3983R

Pin Descriptions

Pin Number

Pin Name

Function

1

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

2

FB

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

3

VCC

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

the IC, a capacitor should be placed as close as possible to the VCC pin

4

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

5, 6

Drain

High Voltage of MOSFET

7

GND

The ground of the switcher

+

J1

AC 90-264V

D1~D4

C1

FR1

+

C2

D5

L1

T1

FB

D

Vcc

R8

CS

+

C4

U1

CPC

C5

3

5,6

4

2

1

R5

Np

Ns

Nfb

D6

C3

R4

Gnd

7

L2

R3

R1

R2

RS1

R7

R6

+

C6

APR3415B

R11

VCC

AREF

DRAIN

DRAIN

GND

GND

VDET

DRISR

R12

C7

R9

C8

R13

R10

CY1

U2