Hello, I have created this circuit here for a pyro, using a FET and SAMD21 MCU. Problem is, I really don't want to put my board and battery at risk by putting trust in one resistor, and risk having the "fire" line stuck open and pumping current through the unprotected FET.
Here is what I am talking about. Sense_1 being a continuity check, Pyro_1 being the "fire" line, and VIN coming from my 2S (7.4V-8.4V) LiPo.
So with a bit of research, I have come across the TPS load switches from TI. These offer the same functionalities as the FET, but in a smaller package, and extra features such as undervoltage, overtemp, etc.
Question is: has anyone ever integrated these with an Arduino? I am new to this and don't really know how all the pins work. For instance, the TPS2H000 is an 16pin MCU with pins such as DIAG_EN, and FAULT, which are supposed to be connected to the MCU in this provided schematic from the datasheet.
But I could not come across the purpose, or how to integrate these pins with an Arduino.
Are these extra pins necessary, or do I just need the "IN1, IN2, VS, OUT1 and OUT2) pins.
Thanks!