Two series lithium battery charging and discharging boards,5V2A output, input PD fast charge 5V-2

2023-05-12 14:57:51
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1 Circuit board PCB description

1.1  Name Two series lithium battery charging and  discharging boards,5V2A output, input PD fast charge 5V-20V

1.2  Applications:Convenient charging  devices, etc.

1.3  Battery pack: 7.4V lithium battery pack,multiple parallel or two series connection, full 8.4V

1.4  Input USB1): 5-12VWhen charging, the light will be on, and when it is fully charged,the light will turn, and the light will flash without connecting the battery

1.5  OutputUSB2): 5V2.4A (up to 3A)

1.6 Introduction to Chip  Functions

1B lithiumbattery charging circuit PW4584

PW4584 is a lithium battery charging management chip, built-inMOS, up to output 8.4V 1A charging, support 5V input boost two series lithiumbattery charging.

2 , DC-DC Buck chip PW2303

PW2303 is a DC-DC buck chip, 130Khz operating frequency, itsinput and output no-load 0 voltage difference. Features: adjustable current  limit, commonly used in 5V input 5V output, while the input will have higherthan 5V voltage regulation. Up to 3A output.

3 A lithiumbattery protection circuit PW7052

PW7052 is a two series lithium battery overcharge, overdischarge,overcurrent detection protection circuit chip, parallel MOS can increase theovercurrent protection value.

4 Lithium battery output circuitPW2163

PW2163 is a DC-DC buck constant voltage chip, input 4.5V-18V,adjustable constant voltage output voltage value, output up to 3A or 5A current.

5 PD fast charging voltage output chipPW6603

PW6603 is a sink  terminal chip of USB PD fast charging protocol, which can make PD fast charging  device output desired voltage (9V,12,15V,20V optional).

2 Circuit diagram


PCB layout is dividedinto two parts: signal controlcircuit + power circuit

Note 1: The  blue thick line is the power trace, the layout should be  wide,SW part (PW2303,PW4584,PW2163) is not only the power  output, but also it is a noise source, the layout should be wide and  the area should  be small.

Note 2: The  red thick line is the power ground, the main points of  the drawing board: to be  wide, the shorter the distance between the connectingloops at each point, the  more holes are punched in the ground.

2, PCB diagram and 3Ddisplay diagram

     

4 BOM Material List                                            .

Comment

Designator

Quantity

100uF 25V 6.3*7.7mm Electrolytic capacitance

C1

1

0603  25V  0.1uF

C2

1

470uF 10V 6.3*7.7mm Electrolytic capacitance

C3

1

0603   25V  220pF

C4

1

0603  25V  1uF

C5

2

0805  16V  22UF

C6, C12, C13, C16, C17, C21

6

0603  16V  0.1uF

C7

1

0805  25V  22UF

C8, C9

2

0603 1UF  16V

C10

1

0603 0.1UF  25V

C11

1

0603 0.1UF  16V

C14, C15, C18, C19

4

NC

C20

1

SS34 SMB

D1

1

Plug-in ring type iron-silicon aluminum 47UH,Wire diameter above 0.7

L1

1

Integrated molded inductor 0850-2.2UH

L2

1

Integrated molded inductor 0850-4.7UH

L3

1

0603 LED Red

LED1

1

PW8205A8TS PWCHIP

Q1, Q2

2

0603  1%  100K

R1

1

0603  1%  24.9K

R2

1

0603 5% 4.7R

R3

1

0603 1% 220k

R4

1

0603 1% 30K for input 9V,or 120K for input12V

R5

1

0603 4.99R 5%

R6

1

0603 1K 1%

R7

1

0603 330R 1% 

R8, R15

2

0603  5%  1k

R9

1

0603  1%  270k

R10

1

0603 1%  100K

R11

1

0603 1% 6.8K

R12

1

0603 26K 1%

R13

1

0603 220K 1%

R14

1

PW2303 PWCHIP

U1

1

PW6603 PWCHIP

U2

1

PW4584 PWCHIP

U3

1

PW7052 PWCHIP

U4

1

PW2163 PWCHIP

U5

1

PL515 USB Intelligent charging protocol

U6

1

USB TYPE C 16PIN

USB1

1

USB A

USB2

1

Note: Materialsfor additional LDO circuit parts are not included.

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