AP3128

Document number: DS43487 Rev. 3 - 2

2 of 12

www.diodes.com

September 2021

© Diodes Incorporated

AP3128

Typical Applications Circuit

CY1

U1

DRISR

VCC

GND

VDD

RX

VDET

3

5

6

1

4

2

APR348

AC

R1

R9

R8

T1

F1

GND

GATE

CS

VCC

AP3128

NTC1

R4

BD1

L1

R2

R3

HV

FB

DEM

CX1

GND

OCDRV

VCC

V5V

PWR_EN

VBUS

VFB

IFB

OTP

ISENP

CC1

CC2

Vo

GND

CON1

CC1

AP43771

CC2

DP

DN

1

4

2

3

8

5

6

D+

D-

2

7

4

3

1

9

5

6

8

13

12

11

10

14

R6

R7

Q2

Q3

Q4

R11

R12

R13

R14

R15

CE1

CE2

CE3

C2

C3

C6

C7

C8

C9

C10

C11

C12

RT1

U2

U3

U4

D1

D2

D4

D3

D5

C4

Figure 1. Typical Application Circuit for PD3.0 PPS Charger

Pin Descriptions

Pin Number

Pin Name

Function

1

FB

Feedback. Directly connected to the opto-coupler.

2

DEM

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

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

3

VCC

Supply voltage of driver and control circuits.

4

GND

Signal Ground. Current return for driver and control circuits.

5

GATE

Gate Driver Output.

6

CS

Current Sense.

7

NC

—

8

HV

High Voltage Input. Sense line voltage and provide startup current to VCC.