MAX77751

3.15A USB-C Autonomous Charger

for 1-Cell Li+ Batteries

www.maximintegrated.com

Maxim Integrated | 38

Typical Application Circuit

Figure 15 illustrates a typical charger application using the MAX77751. Although there are connections between the MCU

and the MAX77751, USB detection and battery charging occur automatically without MCU intervention. In the application,

the MCU performs two functions: controls the D+/D- switch (MAX4906) and enables or disables battery charging. For the

latter function, the MCU can be replaced by the circuit shown in Figure 13. ENBST can also be implemented in different

ways and is typically expected to be a switch or button of the target device.

4.5V TO 13.7V/3A

0.47µH

2.2µF

2 x 10µF

CC1

CC2

CHGIN

LX

SYS

PVL

ENBST

BATT

ITOPOFF

GND

BST

10µF + 22µF

0.1µF

10µF

INOKB

STAT

IFAST

DP

DN

BYP

CHGIN

LX

PGND

BATT

SYS

23

24

1

22

3

6

7

4

5

8

11

12

9

10

13

15

16

18

17

21

20

2.2µF

1kΩ

1kΩ

14

PGND 19

2.2µF

24.3kΩ

24.9kΩ

MCU

CC2

USB TYPE-C

CONNECTOR

CC1

D+

D-

GPIO

(OPEN DRAIN

OUTPUT)

SYS

ENBST

BATTE RY PACK

3.15A

MAX77751

D- D+

2

MAX4906

GPIO

Figure 15. Typical Charger Application