I'm trying to build my first Mosfet H Bridge, the goal is to build a bridge with Vin = 5 - 12 V, Imax = 30 A, managed by microcontroller.
I have read about functional principle and Mosfet parameters, but I have some doubts about the implementation.
I have seen that many people use Half bridge drivers like in this answer but I have not seen that galvanic isolation is implemented in any design, furthermore in most of these chips that I have seen just have one Ground or Reference Point, with exception of IRS21844, so I supposed that these IC's don't have isolation.
I know in advance of the IGBT Gate Drive Optocoupler existence. So my questions are:
Is enough safe to use only chips like IRS21844 to drive the bridge and if not which optocoupler you recommend?.
What security precautions should I take into account in addition to TVS diodes, Pull Down resistors and Zener diodes in the gates?
Which is the best method to control the bridge, Optocoupler + Anti shoot through circuit + float power supply, Half bridge driver + optocouplers?
Which is the best way to get a float power supply?
Excuse me for so many questions, but is the first time I work with Mosfets and my intention is to learn the right way to build H bridge with these :).