Support PD/QC fast charging protocol high voltage 5V-9V four series 16.8V lithium battery 1A charging board

2023-05-12 15:07:14
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1 Circuit board PCB description

1.1  Name Support PD/QC fast charging protocol highvoltage 5V-9V four series 16.8V lithium battery 1A charging board

1.2  Applications:Convenient charging devices, etc.

1.3  Battery pack: 14.8V lithium battery pack,four series 3.7V lithium battery full 16.8V

1.4  Input voltage: 5V-9VWhen charging, thelight will be on, and when it is fully charged, the light will turn

1.5  Max charging current 1.1A

1.6  Introduction to Chip  Functions

1, Lithium battery charging circuitPW4040

PW4040 Lithium battery charge management chipUp to 3.5Acharging currentadjustable  output charging voltage,support wide input voltage.

2, USB C port PD/QC fast charge Protocol chip PW6605

PW6605 is a PD/QC fast charge protocol chip, SINK terminal,responsible for protocol communication PD charger to output its specified  voltage.

2, Circuit diagram



PCB layout is divided into two parts: signal control circuit+ power circuit

Note 1: The  blue thick line is the power trace, the layout should be wideSW part (Q1, D1, L1 three devices connected) 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 bewide, the shorter the distance between the connecting loops at each point, the  more  holes are punched in the ground.(input, C5, C6, C10, C9, C8,Q1 and battery  ground)


3, PCB diagram and 3Ddisplay diagram

  

4 BOM Material List                                            .

Comment

Designator

Footprint

Quantity

0603  1uF 25V

C1,C3,C4

0603A

3

0805 22uF 25V

C5, C6

0805C

2

0603 560pF 25V

C7

0603A

1

0805 10uF 25V

C8

0805C

1

0603 0.1uF 25V

C9

0603A

1

100uF 25V SMD Aluminum Capacitors 6.3MM

C10

SMD

1

0603 10uF 16V

C11

0603A

1

SS34 SMB

D1

SMB

1

Integrated molded inductor 0850  22UH

L1

SMD

1

LED Red 0603

LED1, LED2

0603A

2

MMBT3904

Q1, Q2, Q3

SOT23-3

3

PW4406 PWCHIP MOS tube

Q4

SOP8

1

0603 1% 6.8k

R1

0603SL

1

0603 1.3M 1%

R8

0603SL

1

0603 1k  5%

R2

0603SL

1

0603 100K 1%

R10

0603SL

1

0603  22K  1%

R3,R9

0603SL

2

0603 1K 5%

R4, R5

0603SL

2

1210 60mR 1%

R6

1210R

1

0603 10k  1%

R7

0603SL

1

PW6605 PWCHIP fast charge chip

U1

ESOP10

3

PW4040 PWCHIP charge chip

U2

SOT23-6

1

USB TYPE C 16PIN

USB1

USB

1

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