I'm aiming to design a 4 NMOS H-Bridge switching configuration. I understand that I am going to need:
- two half bridge gate drivers to driver the mosfets
- a comparator stage to compare the audible and high frequency signal
- low pass filter stage to filter the high frequencies.
A few design constraints of this amp includes:
- 5W output
- 42kHz switching frequency
- 2kHz audible signal