AP43776

Document number: DS43473 Rev. 5 - 2

3 of 12

www.diodes.com

September 2022

© Diodes Incorporated

AP43776

Typical Applications Circuit (continued)

An example of 120W Dual-port Type C PD3.1 PPS car charger is shown Figure 3. Powered by the VREG pin (internal 5V

Regulator output) for the attached DC-DC Controller, detecting Vin through GPIO1, the AP43776 could enter protection mode to

disable DC/DC stage by controlling the GPIO2 pin. All PD decoded information through CC1 and CC2 pin as well as measured

parameters of the operating coditions, the AP43776 conveys necessary actions, such as Constant Voltage output, Constant

Current output and protection functions through I2C interface. With built-in application firmware of the AP43776, VBUS MOS

switches are not needed, and GPIO pins are used to do battery detection, power sharing, temperature detection, LED indicator,

and so on.

Vreg

CC1A

GND

CC2A

RT

Vo

GND

TYPE-C

CC2

CC1

AP43776

CSG

LG2

BS2

SW2

UG2

ISENSP

ISENSN

VOUT

FB

VREG

ISNSO

INTB

F1

Vin

SW1

SW1

Vreg

D+

D-

VCC

VREG

VREG

VG

VREG

DC/DC

(I2C-Based)

CC1B

CC2B

Vreg

Vo

GND

TYPE-C

CC2

CC1

CSG

LG2

BS2

SW2

UG2

ISENSP

ISENSN

VOUT

FB

VREG

ISNSO

INTB

F1

Vin

SW1

SW1

Vreg

D+

D-

VREG

VREG

VG

VREG

GPIO2

GPIO7

To EN pin

To EN pin

GPIO8

GPIO2

GPIO5

GPIO6

GPIO1

GPIO1

GPIO1

DC/DC

(I2C-Based)

Figure 3. A 120W 2C PD3.1 PPS car charger design based on 2*DC/DC+1*AP43776