AP43771

Document number: DS41431 Rev. 6 - 3

2 of 10

www.diodes.com

June 2022

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AP43771

Typical Applications Circuit

CY1

R 4

R 8

C6

C3

C8

T1

U2

R19

C9

GND

GATE

FB

SENSE

VCC-IN

PWM IC

U1

Q 1

D7

R 6

R7

DEM

C4

9

6

8

2

5

R18

3

DRISR

VCC

GND

VDD

AREF

VDET

1

2

3

4

5

6

R20

C12

Q2

U3

C7

C13

HV

VCC

CTRL

RT1

1

4

7

SR IC

CC1

GND

AP 43771

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

Pin Descriptions

Pin Number

Pin Name

Function

1

VBUS

Output Terminal for Discharge Path.

2

PWR_EN

External NMOS Gate Driver. To control External MOS switch, 1: To enable VBUS voltage

0: Disconnect VBUS.

3

VCC

The Power Supply of the IC, connected to a ceramic capacitor.

4

ISENP

Input Current Sense Positive Node.

5

OCDRV

CC/CV Output. Open Drain Output for Opto-Coupler.

6

GND

Ground

7

OTP

Source Current to External NTC Sensor for OTP (Over Temperature Protection). Current amplitude

is programmable.

8

VFB

CV Input. Negative Node of CV OPAMP for Opto-Coupler.

9

IFB

CC Input. Negative Node of CC OPAMP for Opto-Coupler.

10

CC2

Type-C_CC2

11

CC1

Type-C_CC1

12

DN

Type-C_DN

13

DP

Type-C_DP

14

V5V

LDO-5V Output