AP39811

Document number: DS39992 Rev. 5 - 2

2 of 18

www.diodes.com

June 2019

© Diodes Incorporated

AP39811

Typical Applications Circuit

AC

R3

C6

T1

D1

R14

C3

C5

CY1

GND

DRAIN

CPR

SOURCE

VCC

AP39811

U1

RF1

R4

FB

VOUT

GND

C2

L1

5,6

4

2

7

R8

R10

1

R15

R7

D2

C1

DB1

R1

R6

R2

3

L2

D3

R5

R9

R11

R12

R13

C4

Pin Descriptions

Pin Number

Pin Name

Function

1

FB

Connect to the auxiliary winding through a resistor divider network, used as a multi-function pin to

realize output voltage detection for CV control, tONS detection for CC control, line voltage sense for

line compensation, and cable compensation as well.

2

CPR

A resistor is connected between FB pin and CPR pin to adjust slant-IV curve.

3

VCC

The power supply for the IC.

4

SOURCE

SOURCE terminal of the integrated MOSFET. The primary side current is sensed through this pin.

5, 6

DRAIN

DRAIN terminal of the integrated MOSFET.

7

GND

Signal ground. Current return for driver and control circuits.