Two series lithium battery charging and discharging boards,5V2A output, input 5V-24V charging
- 2023-05-12 14:57:40
- lu Original
- 229
1 Circuit board PCB description:
1.1 Name : Two series lithium battery charging anddischarging boards,5V2A output, input 5V-24V charging
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 ( DC): 5-24V( When 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 Output( USB1): 5V2.4A (Maximum 3A) , The charging current of the battery is up to 1A
1.6 Introduction to Chip Functions:
1, B lithium battery charging circuit: PW4202
PW4202 is a lithium battery charging management chip, external MOS, up to 3A chargingcurrent,, support 5V input boost two series of lithium battery 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 currentlimit, commonly used in 5V input 5V output, while the input will have higher than 5V voltage regulation. Up to 3A output.
3, A lithium battery protection circuit : PW7052
PW7052 is a two series lithium battery overcharge, overdischarge,overcurrent detection protection circuit chip, parallel MOS can increase the overcurrent protection value.
4, Lithium battery output circuit : PW2163
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.
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 shouldbe 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 connecting loops at each point, the more holes are punched in the ground.
3 , PCB diagram and 3D display diagram
4 , BOM Material List .
Comment |
Designator |
Quantity |
100uF 35V 6.3*7.7mm Electrolytic capacitance |
C1 |
1 |
0603 50V 0.1uF |
C2 |
1 |
470uF 10V 6.3*7.7mm Electrolytic capacitance |
C3 |
1 |
0603 50V 220pF |
C4 |
1 |
0603 16V 0.1uF |
C5 |
1 |
0805 16V 22UF |
C6 |
1 |
0805 25V 22UF |
C7, C10, C11, C14, C15 |
5 |
0603 0.1UF 16V |
C8, C9, C12, C13 |
4 |
SS34 SMB |
D1 |
1 |
Plug-in ring type iron-silicon aluminum 47UH,Wire diameter above 0.7 |
L1 |
1 |
Integrated molded inductor 0850-6.8UH |
L2 |
1 |
Integrated molded inductor 0850- 3.3UH |
L3 |
1 |
0603 LED Green |
LED1 |
1 |
0603 LED Red |
LED2 |
1 |
PW4406 |
Q1 |
1 |
PW8205A8TS PWCHIP |
Q1, Q2 |
2 |
0603 1% 100K |
R1 |
1 |
0603 1% 24.9K |
R2 |
1 |
1210 1% 60mR |
R3 |
1 |
0603 5% 4.7R |
R4 |
1 |
0603 5% 1k |
R5, R6 |
2 |
0603 1% 0R |
R7 |
1 |
0603 1% 20R |
R8 |
1 |
0603 330R 1% |
R9, R10 |
2 |
0603 1K 1% |
R11 |
1 |
0603 200K 1% |
R12 |
1 |
0603 26K 1% |
R13 |
1 |
PW2303 PWCHIP |
U1 |
1 |
PW4202 PWCHIP |
U3 |
1 |
PW7052 PWCHIP |
U3 |
1 |
PW2163 PWCHIP |
U4 |
1 |
PL515 USB Intelligent charging protocol |
U5 |
1 |
USB A |
USB1 |
1 |
Note: Materialsfor additional LDO circuit parts are not included.