I'm working on this hobby project and I am trying to create a PCB for it. I want to power the project with 2 18650 batteries. Because the product needs to be used by other people as well, I would like to build in some protections. One of them is over-voltage, under-voltage, reversed polarity, and short circuit. Herefore I found a protection ic.
The rest of the PCB consists of an ESP32, WS2812 LEDS x 24, ICM-20948. The total current that can be drawn would be around 2.5 Amps or max 3 Amps.
For the protection IC, as seen in the datasheet, there need to be 2 MOSFET's. I have tried to search on the internet on how to choose which MOSFET is suitable for the protection IC and application. But I just can't figure out what is good or not. So now I have tried this with the following products.
My choice of the current MOSFET's is based on this information:
How to Select a MOSFET – Battery Protection
The current design is also based on the typical design of the battery protection IC.
I'm not an expert on creating PCB's so there will be stuff that isn't correct if so I would like to know as well and if you have some tips or good instruction videos or posts I'm always in for that.
So now I have 2 questions.
1 - Did I choose the correct MOSFET's?
2 - Am I doing any good on the design?
For the full schematic look on my GitHub repository -> Taekwondo - PCB