Hello all,
I have been trying to figure this out for hours and thought that I should probably just ask:).
I am powering a ESP32 using batteries and a DC-DC converter, the converter has an EN pin that I want to use to turn the converter off if battery voltage (3 NiMh cells) drops below 3v (0%). MOSFETs seem like the logical approach except I only need a signal voltage and I am concerned that a MOSFET will not be accurate enough given the usual wide curve/range. So, I started looking at TVS diodes since they have a very finite cutoff but I am concerned about lifespan since this is not their intended use and they are not designed to pass current/voltage for extended periods of time (8+ hours in this case). I am sure that someone will have a much better idea? Thanks for reading
The controller has an brown-out interrupt that can be used to put the controller asleep or to turn off the power supply.
Also see the Related Topics below.
There are low power voltage monitors that may work for you. You may have to invert the output logic but using a small FET keeps the power very low.
Thank you. This was the solution. I have never needed to use a voltage monitor before and did not know what to look for. I ended up using a SSP61C from Soproin Micro. Datasheet is here if anyone else runs across this and needs one. Thanks for your help
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.