Two series lithium battery charge and discharge board, 5V2A input and output, input protection against 36V
- 2023-05-12 14:58:09
- lu Original
- 193
1 Circuit board PCB description：
1.1 Name ： Two series lithium battery charge anddischarge board, 5V2A input and output, input protection against 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（ Whencharging, the light will be on, and when it is fully charged, the light willturn, and the light will flash without connecting the battery）
1.5 Output （ USB2）： 5V2.4A
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， A lithium battery protection circuit ：PW7052
PW7052 is a two series lithium battery overcharge, overdischarge, overcurrent detectionprotection circuit chip, parallel MOS can increase the overcurrent protection value.
3， Lithium batteryoutput circuit ：PW2163
PW21623 is a DC-DCbuck 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 USBinput 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 for damaged 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 (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 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 3Ddisplay diagram
4 ， BOM Material List .
|
Comment |
Designator |
Quantity |
|
0805 16V 22UF |
C1, C2, C3, C6, C7, C10, C11 |
7 |
|
0603 0.1UF 16V |
C4, C5, C8, C9 |
4 |
|
0805 50V 10UF |
C12 |
1 |
|
0603 1UF 50V (LDO part) |
CIN, CIN2 |
2 |
|
0603 10UF 16V (LDO part) |
COUT, VO2 |
2 |
|
SS34 SMB |
D1 |
1 |
|
Integrated molded inductor 0850-6.8UH |
L1 |
1 |
|
Integrated molded inductor 0850- 3.3UH |
L2 |
1 |
|
PW6206 SOT23-3(LDO part) |
LDO1 |
1 |
|
PW6513 SOT89-3(LDO part) |
LDO2 |
1 |
|
0603 LED Red |
LED1 |
1 |
|
0603 LED Green |
LED2 |
1 |
|
PW4406 PWCHIP |
Q1 |
1 |
|
PW8205A8TS PWCHIP |
Q2, Q3 |
2 |
|
0603 0R 1% |
R1 |
1 |
|
0603 20R 1% |
R2 |
1 |
|
1210 60mR 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, R10 |
2 |
|
NC |
R11 |
1 |
|
0603 40K 1% |
R12 |
1 |
|
0603 300K 1% |
R13 |
1 |
|
0805 10R 5%(LDO part) |
R absorption |
1 |
|
PW4202 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 |
