Two series lithium battery charging and discharging board,5V2A input and output, input voltage protection 36V
- 2023-05-12 14:58:03
- lu Original
- 376
1 Circuit board PCB description：
1.1 Name ： Two series lithium battery charging anddischarging board,5V2A input and output, input voltage protection 36V
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）： 5V2A（ 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 （ up to 3A）
1.6 Introduction to Chip Functions ：
1， B lithium battery charging circuit：PW4584
PW4584 is alithium battery charging management chip, built-in MOS, up to output 8.4V 1Acharging, support 5V input boost two series lithium battery charging.
2， 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 protectionvalue.
3， Lithium battery output circuit ：PW2163
PW2163 is a DC-DC buck constant voltage chip, input 4.5V-18V, adjustable constant voltage outputvoltage value, output up to 3A current.
4， Input overvoltageprotection threshold circuit ：PW2609
PW2609 is a USB input overvoltage protection chip, input overvoltage adjustable threshold off,36V input high withstand voltage.
Function： 1， Misplaced high voltage protection 2， USB Hot Swap Protection， 3， Abnormal high voltage protection fordamaged fast charger.
2， Circuit diagram ：
PCB layout is divided into two parts: signal controlcircuit + power circuit
Note 1： The blue thick line is the power trace, the layout should be wide,； SW part (PW2163 PIN 6 and L1, D1, Q1 three devices connected) is not onlythe 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 connecting loops at each point, themore holes are punched in the ground.
3， PCB diagram and 3Ddisplay diagram
4 ， BOM Material List .
|
Comment |
Designator |
Quantity |
|
0805 16V 10UF |
C1, C15 |
2 |
|
0603 1UF 16V |
C2 |
1 |
|
0805 16V 22UF |
C3, C7, C10, C11, C13, C14 |
6 |
|
0603 0.1UF 16V |
C4, C5, C8, C9 |
4 |
|
NC |
C6 |
1 |
|
0805 50V 10UF |
C12 |
1 |
|
SS34 SMB |
D1 |
1 |
|
Integrated molded inductor 0850-2.2UH |
L1 |
1 |
|
Integrated molded inductor 0850- 3.3UH |
L2 |
1 |
|
0603 LED Red |
LED1 |
1 |
|
PW8205A8TS PWCHIP |
Q2, Q3 |
2 |
|
0603 4.99R 5% |
R1 |
1 |
|
0603 100K 1% |
R2 |
1 |
|
0603 270K 1% |
R3 |
1 |
|
0603 1K 1% |
R4 |
1 |
|
0603 330R 1% |
R5, R6 |
2 |
|
0603 5.1K 1% |
R7, R8 |
2 |
|
0603 1K 5% |
R9 |
1 |
|
0603 6.8K 1% |
R10 |
1 |
|
NC |
R11 |
1 |
|
0603 26K 1% |
R12 |
1 |
|
0603 200K 1% |
R13 |
1 |
|
PW4584 PWCHIP |
U1 |
1 |
|
PW7052 PWCHIP |
U2 |
1 |
|
PW2163 PWCHIP |
U3 |
1 |
|
PW2609 PWCHIP |
U4 |
1 |
|
PL515 USB Intelligent charging protocol |
U5 |
1 |
|
USB TYPE C 6PIN |
USB1 |
1 |
|
USB A |
USB2 |
1 |
Note: Materials for additional LDO circuit parts are notincluded.
