Love Tomb Style No. 366 - LM25116 multifunctional constant voltage and constant current fast charging module in the atmosphere

This is a pure step-down DCDC synchronous rectifier module, the main control is LM25116

I tentatively set the input voltage to 23-26V. It is best to use 24V DC input.

The output voltage range is 1.2-20V, and the maximum current will not exceed 20A

Because it is equipped with an operational amplifier to expand the constant voltage and constant current function, I set the constant current size to a maximum of 10A.

Because there is a USB-A port output, I added a fast charging chip, that is, FS11X as a fast charging output, which supports most protocols within 12V, including VOOC SCP

EN I pulled out to connect the independent switch control ,

I drew a circle of silk screen on the back of the module specifically to fit the radiator sold by Laowu. It is very cheap. The fan power supply is directly connected to the input terminal and has an independent switch control.

Secondly, in order to prevent the constant current module and the fast charge identification module from conflicting with each other, I also use separate switches to control their power supply. You can enable either one to work. You can also disable them.

We in Zhangjiajie are currently under a very tight epidemic lockdown. Today is the 18th day of the lockdown. There are some components on the board that I cannot buy, but since they are all based on the measured circuits of other modules, there should be no big problems. (Top Multiple resistors and capacitors may be selected incorrectly)

As for ripple, I think it's pretty ideal, basically it can be controlled within 40 millivolts .