I have a circuit where microcontroller drives a H-bridge which is powered from 12V. I am having a problem with driving the high-side MOSFETs. I will be turning the H-bridge on/off only couple of times a day for up to 5 minutes at once.
I've designed a boost converter that is capable of converting 12V to 24V in hope of driving the high-side MOSFETs. However I am currently stuck with connecting microcontroller to boost converter for driving the gates.
This is how I am thinking of wiring it up:
But... Boost converter is working in continous current mode. And if I were to leave boost converter working on forever, if I wont drive H-brdige, the voltage output from the boost converter would rise untill something would fail.
And if I were to enable the gate driver IC only when I would want to turn the H-bdrige on, same thing would happen, because I would need to power it for up to 5 minutes.
Does anyone have any idea on how drive high-side MOSFETs without blowing something up?