I've spent the last few weeks looking into how to create a digitally controlled high voltage variable resistor and I came to the conclusion of MCU>DAC>common emitter amplifier>source follower, and that works for some of my intended designs but now I need to create a high voltage power supply and I want it to have really good transient response.
The voltage range will be 0-600v and the current range will be 0-100ma.
I want to create as close to an ideal voltage source as I can. This particular power supply will be used for audio purposes. I will probably use a CRC filter for the initial filtering before the regulator.
I wanted to use a 32bit ADC/DAC feedback loop to feed the pass transistor for this design but I read that an analog feedback loop will have way better transient response than a digital feedback loop. I don't know if this includes a potential 32bit feedback resolution but such a system will be expensive to create in either case so it's worth looking into the analog loop.
So now I'm faced with the possibility of using an analog feedback loop with a digitally controlled voltage reference.
I need advice on what the best approach is for best transient response.
The voltage range will be 0-600v and the current range will be 0-100ma.
I want to create as close to an ideal voltage source as I can. This particular power supply will be used for audio purposes. I will probably use a CRC filter for the initial filtering before the regulator.
I wanted to use a 32bit ADC/DAC feedback loop to feed the pass transistor for this design but I read that an analog feedback loop will have way better transient response than a digital feedback loop. I don't know if this includes a potential 32bit feedback resolution but such a system will be expensive to create in either case so it's worth looking into the analog loop.
So now I'm faced with the possibility of using an analog feedback loop with a digitally controlled voltage reference.
I need advice on what the best approach is for best transient response.
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