AP39303

Document number:DS41017 Rev. 7 - 3

2 of 16

www.diodes.com

July 2022

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AP39303

Typical Applications Circuit

D9

CY1

AC

R11

C3

C8

T1

D5

F 1

R19

C5

C9

NTC1

R10

R9

C4

BD1

C2

L2

R18

R14

Q2

D 6

C1

C7

C14

RT1

R15

C10

R13

R12

R16

CC1

GND

AP43771

OCDRV

VCC

Vo

GND

CON1

C15

U4

CC 2

V 5 V

PWR_ EN

VBUS

VFB

IFB

OTP

ISENP

RT2

C17

C18

R 21

C20

R 25

CC2

CC1

D-

D+

DN

DP

R4

R8

C6

U2

GND

FB

SENSE

VCC-IN

AP39303

U1

DEM

8

1to 5

14

10

12

HV

VCC

CTRL

9

13

11

D

S

15

16

DRISR

VCC

GND

VDD

AREF

VDET

1

6

3

4

5

2

R20

C12

U3

C13

APR 347

C11

L1

R2

D8

Q3

Pin Descriptions

Pin Number

Pin Name

Function

1 to 5

D

The Drain of Internal Power MOSFET

6

NC

Suspended

8

HV

High Voltage Input. Sense Line Voltage and Provide Startup Current to VCC

9

CTRL

Programmable External Protection

10

FB

Feedback. Directly Connected to the Opto-Coupler

11

VCC

Supply Voltage of Driver and Control Circuits

12

DEM

Valley Detection for QR Control. Sample VOUT to Realize SOVP and SUVP Protection

13

VCC_IN

Wide Range Input Supply Voltage to Produce VCC

14

SENSE

Sense the Primary Current

15

GND

Signal Ground

16

S

The Source of Internal Power MOSFET