AP3304

Document number: DS43559 Rev. 4 - 2

2 of 12

www.diodes.com

October 2021

© Diodes Incorporated

AP3304

Typical Applications Circuit

CY1

R 4

R 8

C6

C3

C8

T1

U2

R19

C9

GND

GATE

FB

SENSE

VCC

AP3304

Q 1

D7

R 6

R7

DEM

C4

5

R18

DRISR

VCC

GND

VDD

REF

VDET

R20

C12

Q2

U3

C13

SR IC

CC1

GND

AP43771V

OCDRV

VCC

C15

U4

CC2

V5V

PWR_EN VBUS

VFB

IFB

OTP

ISENP

RT2

C16

C18

C19

R 22

C20

R25

C11

DN

DP

Vo

GND

CON1

Q3

CC2

CC1

D+

D -

AC

R11

D5

F1

C5

NTC1

R10

BD1

C2

L2

R14

D6

C1

R15

C10

R13

R12

L1

R2

L 3

Figure 1

Pin Descriptions

Pin Number

Pin Name

Function

1

GND

Signal ground. Current return for driver and control circuits

2

FB

Feedback. Directly connected to the opto-coupler

3

DEM

Valley detection for QR control, AC line voltage detection for Brown-in/Brown-out, Sample output

voltage for SOVP and SUVP, OCP line compensation current setting.

4

SENSE

Current sense

5

VCC

Supply voltage of driver and control circuits

6

GATE

Gate driver output