"Hello everyone, I'm new to the field of PCB design. I'm working on a circuit to recharge a Li-ion battery. I want to charge this battery with a voltage of 4.1V and 3A. I want to use the MP2393GTL-Z regulator for this. My input voltage source is a stabilized power supply that provides 24V. Below is a screenshot of the setup I've made, but I don't think it's correct. If you could help me correct it, I would appreciate it, and Thank you all for any help

 

A voltage regulator alone isn't sufficient for charging Li-ion batteries safely.

https://batteryuniversity.com/article/bu-409-charging-lithium-ion

Once you study the problem more thoroughly, you'll come to the conclusion that buying a commercial solution will be less work and cost.

 

Read this about how to charge a Li-Ion battery.
Then you will see why your circuit is not sufficient, and likely dangerous, to charge your battery.

 

A voltage regulator alone isn't sufficient for charging Li-ion batteries safely.

https://batteryuniversity.com/article/bu-409-charging-lithium-ion

Once you study the problem more thoroughly, you'll come to the conclusion that buying a commercial solution will be less work and cost.

"I know that using only a regulator to charge a battery is not sufficient. I will use a microcontroller to regulate the charge. My problem lies in choosing the resistors and capacitors for the regulator. I have done my best to choose the values based on the datasheet, but I am absolutely sure that what I have done is not correct. I want to achieve a stable voltage of 4.1 V and a current of 3 A from a 24 V input voltage."

 

Are You sure that your Battery can withstand 3-Amps without fear of overheating ?

If You would like maximum Battery-Life-Expectancy,
You would be much better-off regulating the Voltage to somewhere between 3.8 and 4-Volts.

I would use your existing Switch-Mode-Regulator to drop the 24V Supply-Voltage down to ~5 or ~6-Volts,
then run that into a Linear-Regulator that has a Current-Limiting-Function,
like the MIC5158YN
.
.
.

 

Why is R4 1000 Megohm?

Friendly advice: spread out the components in the schematic, such that the labels aren’t all bunched up.

 

Please re-format your schematic into a less jumbled arrangement?

 

ok i will

Please re-format your schematic into a less jumbled arrangement?

Please re-format your schematic into a less jumbled arrangement?

Okay, I will rearrange this circuit to make it clearer, and I would like to have your choice of passive components that would meet my operating conditions. This is for a final year project, and it would help me a lot

 

I'm not sure if it's a clearer circuit, but it's the best I can do

 

Not much of an improvement. If you still have text and symbols on top of each other then you have only made a half vast attempt at rectifying the problem. Did you ever learn anything about creating a proper schematic diagram? Your knowledge of the subject appears fatally deficient.

 

There's a bazillion chips made specifically to charge lithium cells safely. The MAX745 can do between 1 and 4 cells.
https://www.analog.com/en/products/max745.html

 

Do it like this:

 

Do it like this:

View attachment 316860

Do it like this:

View attachment 316860

i finded

 

"I found another IC from the same manufacturer, but it operates on 23V instead of 24V. I corrected my circuit based on the typical schematic from the datasheet, which takes 23V and outputs 3.3V. So, I calculated the resistance values for the feedback voltage divider and used the other components from the second circuit, and here is the result. I hope this circuit is clearer. The second IC is the MP2307
."

 

i finded

So why didn't you revise your schematic to improve the clarity of your presentation?

 

"I found another IC from the same manufacturer, but it operates on 23V instead of 24V. I corrected my circuit based on the typical schematic from the datasheet, which takes 23V and outputs 3.3V. So, I calculated the resistance values for the feedback voltage divider and used the other components from the second circuit, and here is the result. I hope this circuit is clearer. The second IC is the MP2307
."View attachment 316937

No not really, it looks like the same mess that you originally presented. What is the point of throwing another variation into the mix?