AP4373A

Document number: DS42059 Rev. 4 - 2

2 of 10

www.diodes.com

May 2020

© Diodes Incorporated

AP4373A

Typical Applications Circuit

Pin Descriptions

Pin Number

Pin Name

Function

1

OCDRV

Used for opto-coupler LED driver transferring signals to primary side via opto-coupler

2

GND

The ground of the IC

3

VCC

The power supply of the IC, connected to a ceramic capacitor

4

D-

Connected to USB D-

5

D+

Connected to USB D+

C2

FR1

T1

C4

D1 to D4

R2A

R1

D5

C1

Np

Na

+

+

+

R3

Ns

FB

R5

DRI

R6

GND

DET

CY1

+

C5

CS

Opto-

Coupler

R7A

Q1

D+

D-

GND

AP4373A

OCDRV

VCC

U2

VOUT

D-

D+

GND

USB1

AP3792

NTC1

NC

VCC

D6

R25

APR34509

R 23

VCC

AREF

DRAIN

DRISR

GND

GND

VDET

CCM

R24

C8

C7

C6

C3

D2

R3

R4

R21

R22

C9

U3

U4

U1

Zener1

Zener2

L1

L2

R7

R2

1

2

3

8

7

6

4

3

1

4

8

7

2

6

5

1

2

3

4

5

OTP

RST1

RST2

5