toothache

CN3791-MPPT lithium battery 4A charging module + battery protection board + light control

Overview

In the light control part circuit, when there is solar input, the battery does not output to the LEDOUT interface.
When there is no sun at night, the light automatically

turns on. The BAT-TEST interface is for testing battery charging. If the battery is connected to this interface, the battery will not be charged directly through the protection board.

Special Note that the CN3791 chip limits
the input voltage. It must be greater than the mppt voltage and the battery voltage is less than 4.00V before entering the charging mode

and wiring to charge

to simulate solar energy. 13.8V. . charging. .

Design Files

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Update:2025-06-23 06:28:45

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