Compatible with USB, PD fast charging input single lithium battery 2A charging chip solution
- 2023-05-12 15:13:22
- 杨工 Original
- 375
1 Circuit board PCB description：
1.1 Name ： Compatible with USB, PD fast charging inputsingle lithium battery 2A charging chip solution
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-9V（ 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） Change the R5resistance value to fast charging voltage 12V,15V,20V （ If you want to checkthe resistance value, please check the PW6603 specification）
1.5 Max charging current ： 2A
1.6 Introduction to Chip Functions：
1. Lithium battery charging circuit： PW4052
PW4052Lithium battery charge management chip， Up to 2.5A charging current, switching type high efficiency, support1 lithium battery charging。
2. DC-DC synchronous step-down circuit： PW2303
PW2303 Synchronous Buck Chip， Input24V-5V, output 5V, up to 3A, characterized by voltage step-down voltagedifference is very low, and high efficiency。
3. USB C port PD fast charge Protocol chip： PW6603
PW6603 is a PD fast charge protocol chip, SINK terminal,responsible for protocol communication PD charger to output its specifiedvoltage
2， Circuit diagram ：
Note1： The blue thick line is the power trace,the layout should be wide, the SW pin is the switch radiation is large, thelayout is wide and the area is small.
Note2： The red thick line is the power ground,the main points of the drawing board: to be wide, the shorter the distancebetween the connecting loops at each point, the more holes are punched in theground
3 ， PCB diagram and 3D display diagram
4 ， BOM Material List .
|
Comment |
Designator |
Footprint |
Quantity |
|
100uF 25V 6.3*7.7mm Electrolytic capacitance |
C1 |
6.3*7.7mm |
1 |
|
0603 25V 0.1uF |
C2, C7 |
0603A |
2 |
|
470uF 16V 8*10mm Electrolytic capacitance |
C3 |
8*10mm |
1 |
|
0603 50V 220pF |
C4 |
0603A |
1 |
|
0603 25V 1uF |
C5 |
0603A |
1 |
|
0805 25V 22UF |
C6, C8, C9 |
0805C |
3 |
|
0603 25V 2.2nF |
C10 |
0603A |
1 |
|
Plug-in ring type iron-silicon aluminum 47UH，Wire diameter above 0.7 |
L1 |
DIP |
1 |
|
Integrated molded inductor 0650-4.7UH |
L2 |
SMD |
1 |
|
0603 LED Red |
LED1 |
0603A |
1 |
|
0603 LED Green |
LED2 |
0603A |
1 |
|
0603 1% 100K |
R1 |
0603SL |
1 |
|
0603 1% 25.5K |
R2 |
0603SL |
1 |
|
0603 5% 4.7R |
R4 |
0603SL |
1 |
|
0603 1% 30K for input 9V，or 120K for input12V |
R5 |
0603SL |
1 |
|
0603 1% 220k |
R6 |
0603SL |
1 |
|
1206 1% 25mR |
R7 |
1206R |
1 |
|
0603 5% 1k |
R8 |
0603SL |
1 |
|
1206 1% 50mR |
R7 |
1206R |
1 |
|
0603 1% 10R |
R3 |
0603SL |
1 |
|
PW2303 PWCHIP Buck Chips |
U1 |
SOP8 |
1 |
|
PW6603 PWCHIP Fast Chips |
U2 |
SOT23-6 |
1 |
|
PW4052 PWCHIP charge chip |
U3 |
ESOP8 |
1 |
|
USB Type C 6PIN |
USB1 |
USB |
1 |
