Two series lithium battery charging and discharging boards,5V2A output, input 5V-24V charging
- 2023-05-12 14:57:46
- lu Original
- 262
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.
