Two series lithium battery charging and discharging boards,5V2A output, input 5V-24V charging
- 2023-05-12 14:57:46
- lu Original
- 261
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( USB2): 5V2.4A (Maximum 3A)
1.6 Introduction to Chip Functions:
1, B lithium battery charging circuit: PW4584
PW4584 is a lithium battery charging management chip, built-in MOS, up to output 8.4V 1Acharging, support 5V input boost two series lithium battery charging.
2 , DC-DC Buck chip : PW2303
PW2303 is a DC-DCbuck chip, 130Khz operating frequency, its input and output no-load 0 voltagedifference. Features: adjustable current limit, commonly used in 5V input 5Voutput, while the input will have higher than 5V voltage regulation. Up to 3Aoutput.
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-DCbuck constant voltage chip, input 4.5V-18V, adjustable constant voltage outputvoltage value, output up to 3A or 5A current.
2, Circuit diagram :
PCB layout is divided into two parts: signal controlcircuit + power circuit
Note 1: Theblue thick line is the power trace, the layout should be wide,; SW part (PW2303,PW4584,PW2163) is not only the power output, but alsoit is a noise source, the layout should be wide and the area should be small.
Note 2: Thered 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.
2, PCB diagram and 3Ddisplay diagram
4 , BOM Material List .
Comment |
Designator |
Quantity |
100uF 25V 6.3*7.7mm Electrolytic capacitance |
C1 |
1 |
0603 50V 0.1uF |
C2 |
2 |
470uF 16V 8*10mm Electrolytic capacitance |
C3 |
1 |
0603 50V 220pF |
C4 |
1 |
NC |
C5, C8, C16 |
3 |
0805 25V 22UF |
C6, C9, C12, C15, C19, C20 |
6 |
0603 0.1UF 16V |
C7, C10, C11, C13, C14, C17, C18, |
7 |
SS34 SMB Good quality |
D1 |
1 |
Plug-in ring type iron-silicon aluminum 47UH,Wire diameter above 0.7 |
L1 |
1 |
PWCHIP 0850-6.8UH |
L2 |
1 |
PWCHIP 0850- 3.3UH |
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% 10R |
R3 |
1 |
0603 4.99R 1% |
R4 |
1 |
0603 1% 6.8K |
R5 |
1 |
0603 1% 1k |
R6, R15 |
1 |
0603 1% 270k |
R7 |
1 |
0603 1% 100K |
R8 |
1 |
0603 330R 1% |
R9, R10 |
3 |
0603 200K 1% |
R13 |
1 |
0603 26K 1% |
R14 |
1 |
PW2303 PWCHIP |
U1 |
1 |
PW4584 PWCHIP |
U2 |
1 |
PW7052 PWCHIP |
U3 |
1 |
PW2163 PWCHIP |
U4 |
1 |
PL515 USB Intelligent charging protocol |
U5 |
1 |
USB A |
USB1 |
1 |
Note: Materials for additional LDO circuit parts are notincluded.