Well, here is the first version of my new SMPS. It is designed to be used in a bass guitar head with a bridged class-d amp.
The reason I chose optocouplers in the gate drive instead of feedback is to allow me to safely measure around the SG3525, and hopefully also a little cheat around compensating the feedback loop, we´ll see about that later.
Things that are still missing:
- another secondary on the main transformer to provide 2x15V for preamps
- yet another high current secondary to generate double HV rails, so that the whole amp can deliver full power for both 4 and 8 ohm loads. This could require changing some connections around shutdown to make the transition between rails smooth.
Feel free to comment
The reason I chose optocouplers in the gate drive instead of feedback is to allow me to safely measure around the SG3525, and hopefully also a little cheat around compensating the feedback loop, we´ll see about that later.
Things that are still missing:
- another secondary on the main transformer to provide 2x15V for preamps
- yet another high current secondary to generate double HV rails, so that the whole amp can deliver full power for both 4 and 8 ohm loads. This could require changing some connections around shutdown to make the transition between rails smooth.
Feel free to comment