USB C port 5V input, two series lithium battery charging management board 8.4V 1A
- 2023-05-12 15:10:21
- lu Original
- 239
1 Circuit board PCB description：
1.1 Name ： USB C port 5V input, two series lithiumbattery charging management board 8.4V 1A
1.2 Applications:Convenient charging devices, etc.
1.3 Battery pack: 7.4Vlithium battery pack, multiple parallel or two series connection, full 8.4V
1.4 Input voltage: 5V-12V（ When charging, the light will be on, and when it is fully charged, thelight will turn） ， Max charging current： 1A
1.5 Introduction to Chip Functions ：
1， Lithium battery charging circuit：PW4202
PW4202 Lithium battery charge management chip， Up to 3A charging current， support two series lithium battery charging.
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, the more holes are punched in the ground.(input, C2, C3, C4,C5,Q1 and battery ground)
3， PCB diagram and 3Ddisplay diagram
4 ， BOM Material List .
|
Comment |
Designator |
Footprint |
Quantity |
|
0805 16V 10UF |
C2, C3 |
0805C |
2 |
|
0805 25V 22UF |
C4, C5 |
0805C |
2 |
|
SS34 SMB |
D1 |
SMB |
1 |
|
Integrated molded inductor 0850 6.8uh |
L1 |
SMD |
1 |
|
0603 LED Green |
LED1 |
0603SL |
1 |
|
0603 LED Red |
LED2 |
0603SL |
1 |
|
PW4406 PWCHIP MOS tube |
Q1 |
SOP8 |
1 |
|
0603 5.1k 5% |
R1, R2 |
0603SL |
2 |
|
1210 1% 60mR |
R3 |
R1210 |
3 |
|
0603 1% 20R |
R4 |
0603SL |
1 |
|
0603 5% 1k |
R4, R5 |
0603SL |
2 |
|
0603 1% 0R |
R6 |
0603SL |
1 |
|
PW4202 PWCHIP charge chip |
U1 |
SOP8 |
1 |
|
USB TYPE C 16PIN |
USB1 |
USB |
1 |
