It’s a switching regulator, so it’s generating PWM and adjusting duty cycles based on voltage feedback to produce a certain voltage on the output. Part of that

It’s a switching regulator, so it’s generating PWM and adjusting duty cycles based on voltage feedback to produce a certain voltage on the output. Part of that means controlling the mosfet gates in the H-bridge. Some of that kind of thing can just be done in analogue circuits but often these kind of power supplies also can do things like hiccup modes for overcurrent, different waveforms for low load current, etc. so it could have a little state machine in it.