5

Applications

The following sections are not part of ST product specifications. They are intended to give a generic application

overview to be used by the customer as a starting point for further implementation and customization. ST

does not warrant compliance with customer specifications. Full system implementation and validation are under

customer responsibility.

5.1

General information

5.1.1

Power supply

The STUSB4761 is supplied through the VDD pin. For application supporting more than 3 A (60 to 100 W

AC adapters typically), at the exception of captive cable implementations, VCONN support is mandatory and

therefore, VCONN input pin must be supplied by a 3.3 V-5 V / 50 mA power.

5.2

Typical application ( up to 60 W- 3 A max.)

Figure 6. Typical implementation

Main1

Main2

Side

CBulk1

Dprim1

Rprim1

1K

Oprim1A

Optocoupleur

Oprim1B

PWM

OUT

SENSE

VDD

GND

FB

RSP1

Dprim2

S

G

D

From Secondary

Cprim1

Cprim1

1000µF

C5

1µF

C2

1µF

1V2

2V7

VSRC

VBUS

GND

R11

47K

R12

10K

R10

100

RSC1

0.010

COM

R33

15k

C3 33nF

R8

3K

R13

402

GND

GND

5

1

T2

STL8P4LLF6

5

1

T3

STL8P4LLF6

CC1

CC2

SCL

SDA

Fault

J24

OUT

D3

GND

GND

Opto

GND

C6

10µF

GND

GND

0

VReg_2V7

15

VReg_1V2

14

VBus-EN_SRC 13

ISense_Disch 8

SCL 5

SDA 6

Opto_DRV

9

Fault 4

CC2 3

CC1 1

VSense_Disch 12

TSense

11

FB

10

VConn_VSys

2

Type-C

Power Delivery

Vdd

16

Gnd

7

U1

STUSB4761

R22

1V2

R1

4.7K

R2

4.7K

R3

4.7K

2V7

C18

10µF

GND

ACDC Primary/Secondary Side

R4

1K

D1

ESDA6V1

GND

STUSB4761

Applications

DS13141 - Rev 3

page 15/29