7V-24V input single Lithium Battery 2A charging management chip PCB

1 Circuit boardPCB description：

1.1  Name ： 7V-24V input single Lithium Battery 2Acharging management chip PCB

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: 7V-24V（ When charging, thelight will be on, and when it is fully charged, the light will turn , and the light will flash without connecting the battery）

1.5   Max charging current ： 2A

1.6   Introduction to Chip Functions：

1， Lithium battery charging circuit：PW4241

PW4241 Lithium battery charge management chip， Up to 2.5A charging current, switching type high efficiency, support 1 lithium battery charging.

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， D1,C3,C1,C4,C7 and the battery grounding terminal）

3 ， PCB diagram and 3D display diagram

4， BOM Material List