USB fast charging device 5V-12V2A two lithium battery Buck-Boost charging scheme PW4000 chip

2023-05-12 15:10:31
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1 Circuit board PCB description

1.1  Name USB fast charging device 5V-12V2A two lithiumbattery Buck-Boost charging scheme PW4000 chip

1.2  Applications: Convenient charging devices,etc.  

1.3  Battery pack: 7.2Vlithium battery pack, multiple parallel or two series connection, full 8.4V

1.4  Input voltage: 5V-12VWhen charging, the light will be on, and when it is fully charged, thelight will turn Change the R5 resistance value to fast charging voltage 9V,15V,20V If you want to checkthe resistance value, please check the PW6603 specificationIf R11,R12,C9,PW6603 and USB1 ports are not connected, you candirectly input DC: 5V-20V to charge the battery.

1.5  Max charging current2A

1.6   Introduction to Chip Functions

1, Lithium battery charging circuitPW4000

PW4000 is a 1-4lithium-ion battery charging management chip, Up to 3Acharging currentsupport voltage rise and fall.

2, USB C port PD fast charge Protocol chip PW6603

PW6603 is a PD fast charge protocol chip, SINK terminal,responsible for protocol communication PD charger to output its specifiedvoltage

2, Circuit diagram




3 PCB diagram and 3D display diagram

    

4 BOM Material List                                           .

Comment

Designator

Quantity

100uF 35V 6.3*7.7mm Electrolytic capacitance

C1

1

0805  25V  22UF

C2, C7, C10

3

0603  25V  0.1uF

C3, C4, C5

3

0603   16V  10uF

C6

1

NC

C8

1

0603  25V  1uF

C9

1

Integrated molded inductor 0650-3.3UH

L1

1

0603 LED Green

LED1

1

0603 LED Red

LED2

1

PW4000 Buck-Boost voltage charging IC

PW4000

1

PW6603 Charger PD voltage protocol chip

PW6603

1

PW2302A

Q1

1

1206  1%  10mR

R1

1

0603  1%  2k

R2

1

0603  1%  1.5K

R3

1

0603  1%  2.4k

R4

1

0603  1%  10k

R5

1

0603  5%  10k

R6, R7

2

0603  5%  2k

R8

1

0603   ‰   0R

R9

1

NC

R10

1

0603  1%  120k

R11

1

0603  1%  220k

R12

1

USB type C  16PIN

USB1

1

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