5V-24V input single Lithium Battery 1A charge management chip circuit board
- 2023-05-12 15:13:07
- lu Original
- 230
1 Circuit board PCB description：
1.1 Name ： 5V-24V input singleLithium Battery 1A charge management chip circuit board
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-24V（ When charging, the light will be on, and when it is fully charged, thelight will turn, and the light will flash without connecting the battery）
1.5 Max charging current ： 1A
1.6 Introduction to Chip Functions：
1， Lithium battery charging circuit：PW4056
PW4056 Lithium batterycharge management chip， Up to 1A charging current, switching type high efficiency, support 1lithium battery charging.
2， DC-DC synchronous step-down circuit：PW2303
PW2303 Synchronous Buck Chip， Input 5V-24V, output5V, up to 3A, characterized by voltage step-down voltage difference is verylow, and high efficiency.
2， Circuit diagram ：
PCB layout is divided into two parts: signal controlcircuit + power circuit
Note 1： Theblue 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.
Note2： Thered 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,C2,PW23037/8 pin,C5,C3,C6,U2 3 pin and bottom pad, C7 and battery grounding）
3 ， PCB diagram and 3D display diagram
4， BOM Material List
Comment
Designator
Footprint
Quantity
0603 16V 4.7uF
C6
0603A
1
100uF 35V 6.3*7.7mm Electrolytic capacitance
C1
6.3*7.7mm
1
0603 50V 0.1uF
C2
0603A
1
470uF 10V 6.3mm Electrolytic capacitance
C3
6.3mm
1
0603 50V 220PF
C4
0603A
1
0603 16V 0.1uF
C5
0603A
1
0805 25V 10UF
C7
0805C
1
Integrated molded inductor 0650-4.7UH
L1
SMD
1
0603 LED Red
LED1
0603A
1
0603 LED Green
LED2
0603A
1
0603 1% 100K
R1
0603SL
1
0603 1% 24.9K
R2
0603SL
1
1206 1% 50mR
R3
0805R
1
0603 5% 4.7R
R4
0603SL
1
0603 5% 1k
R5
0603SL
1
0603 1% 1k
R6
0603SL
1
PW2303
U1
SOP8
1
PW4056
U2
ESOP8
1
