AP3983B/C/D

Document number: DS36784 Rev. 4 - 2

2 of 13

www.diodes.com

July 2016

© Diodes Incorporated

AP3983B/C/D

Typical Applications Circuit

+

J1

AC 90-264V

D1 to D4

C1

F1

+

C2

D6

L1

T1

FB

R6

D

VCC

R5

CS

+

C3

U1

CPC

C4

3

5,6

4

2

1

Np

Ns

Nfb

D5

C5

R4

Vo+

Vo-

GND

7

+

C7

R9

C8

+

R3

R13

R7

C6

R8

D7,D8

L2

CY1

C9

R12

R1

R2

For AP3983B/C/D (12V/1.5A)

Item

Function

QTY

Item

Function

QTY

C1, C2

15µF/400V, electrolytic

2

U1

AP3983D, PDIP-7

1

C3

4.7µF/50V, electrolytic

1

R1, R2

2M

, 1206

2

C4

10nF, ceramic, 0805

1

R3

200

, 1206

1

C5

1nF/250V, ceramic

1

R4

150k

, 1206

1

C6

1nF/100V, 0805

1

R5

22k

, 1%, 0805

1

C7, C8

1000µF/16V, electrolytic

2

R6

47k

, 1%, 0805

1

C9

10pF/16V, 0805

1

R7

2

, 1206

1

CY1

1

R8

30

, 1206

1

D1 to D6

1N4007, rectifier diode

6

R9

5.1k

,1206

1

D7, D8

MBR3100, Schottky diode

2

R12

1.2

, 1%, 1206

1

F1

2A/250V, fuse

1

R13

1.8

, 1%, 1206

1

L1

30mH, Common inductor, EE9.8

1

T1

EE20 core, PC40, transformer

1

L2

250µH/2A, Common inductor

1

–

–

–

Pin Descriptions

Pin Number

Pin Name

Function

1

CPC

This pin connects a capacitor to GND for output cable compensation

2

FB

The voltage feedback from auxiliary winding

3

VCC

This pin receives rectified voltage from the auxiliary winding of the transformer

4

CS

Current sense for primary side of transformer

5, 6

D

This pin is connected with an internal power MOSFET

’s drain

7

GND

This pin is the signal reference ground