USB input with 6.1V overvoltage off, 36V withstand voltage protection, single lithium battery 2A charging management board
- 2023-05-12 15:11:44
- lu Original
- 206
1 Circuit board PCB description：
1.1 Name ： USB input with 6.1V overvoltage off, 36Vwithstand voltage protection, single lithium battery 2A charging managementboard
1.2 Applications:Convenient charging devices, etc.
1.3 Battery pack: 3.7Vlithium battery pack, multiple parallel or single series connection, full 4.2V
1.4 Input voltage: 5V（ When charging, the light will be on, and when it is fully charged, thelight will turn）
1.5 Max charging current ： 2A
1.6 Introduction to Chip Functions：
1， Lithium battery charging circuit：PW4052
PW4052 Lithium battery charge management chip， Up to 2.5Acharging current， support single series lithium battery charging.
2， Overvoltage protection circuit：PW2609
PW2609 is a USBinput overvoltage protection chip, adjustable input overvoltage shutdown,default 6.1V, 36V input protection.
Function： 1， Misplaced high voltage protection 2， USB Hot SwapProtection， 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 (Q1, D1, L1 three devices connected) is not only the poweroutput, 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 bewide, the shorter the distance between the connecting loops at each point, themore holes are punched in the ground.(input, C1, PW2609 pin 6, C2, C5, PW4052bottom pad, C3, C4, and battery ground)
3 ， PCB diagram and 3D display diagram
4 ， BOM Material List .
|
Comment |
Designator |
Footprint |
Quantity |
|
0805 50V 10UF |
C1 |
0805C |
1 |
|
0603 16V 10uF |
C2 |
0603A |
1 |
|
0805 16V 22UF |
C3, C4 |
0805C |
2 |
|
0603 16V 0.1uF |
C5 |
0603A |
1 |
|
Integrated molded inductor 0650-4.7UH |
L1 |
SMD |
1 |
|
0603 LED Green |
LED1 |
0603A |
1 |
|
0603 LED Red |
LED2 |
0603A |
1 |
|
0603 1% 5.1K |
R1, R2 |
0603SL |
2 |
|
0603 1% 1K |
R4 |
0603SL |
1 |
|
1206 1% 50mR |
R4 |
1206R |
1 |
|
PW2609 |
U1 |
SOT23-6 |
1 |
|
PW4052 |
U2 |
ESOP8 |
1 |
|
USB TYPE C 16PIN |
USB1 |
USB |
1 |
