Hi,
Bit of a random question for anyone who is up on switched mode power supply topologies.
I'm designing a high voltage power supply to run from 9-12V. Ouput should be 200-350V at low current. Total power input sohuldn't reach more than 15W. There are two different apps, one is for capacitor charging (high power Xenon strobe) and the other is for a portable valve preamp.
Now, given the two different apps I realise that noise will be a problem on the valve preamp, so I'm going for a resonant royer design. Its output would be fairly well regulated and given the almost sinusoidal waveform, noise and EMI sohuld be low.
But for the xenon strobe, the output is effectively going from 0-300 as the cap charges. The most common type of inverter for this it seems is a flyback configuration. But I have seen some documentation on the use of 'tapped inductor' designs. Or 'autotransformer'. Which are essentially boost converters that allow a greater voltage output for a given input.
Does anyone have experience with designing flybacks or tapped inductor converters? Because I'm a perfectionist I'm after high efficiency (>80%) but trying to avoid specialist IC's such as those from Linear Technology and Maxim.
Most xenon strobe inverters on the web either run from 1.5V and are self resonant, or direct from mains. I've yet to see a 'half decent' 12V medium power inverter that achieves good efficiency. I'm rolling my own transformers/inductors and have plenty of MOSFET's to play with. just after some advice/experience.
Thanks.
Blueteeth
Bit of a random question for anyone who is up on switched mode power supply topologies.
I'm designing a high voltage power supply to run from 9-12V. Ouput should be 200-350V at low current. Total power input sohuldn't reach more than 15W. There are two different apps, one is for capacitor charging (high power Xenon strobe) and the other is for a portable valve preamp.
Now, given the two different apps I realise that noise will be a problem on the valve preamp, so I'm going for a resonant royer design. Its output would be fairly well regulated and given the almost sinusoidal waveform, noise and EMI sohuld be low.
But for the xenon strobe, the output is effectively going from 0-300 as the cap charges. The most common type of inverter for this it seems is a flyback configuration. But I have seen some documentation on the use of 'tapped inductor' designs. Or 'autotransformer'. Which are essentially boost converters that allow a greater voltage output for a given input.
Does anyone have experience with designing flybacks or tapped inductor converters? Because I'm a perfectionist I'm after high efficiency (>80%) but trying to avoid specialist IC's such as those from Linear Technology and Maxim.
Most xenon strobe inverters on the web either run from 1.5V and are self resonant, or direct from mains. I've yet to see a 'half decent' 12V medium power inverter that achieves good efficiency. I'm rolling my own transformers/inductors and have plenty of MOSFET's to play with. just after some advice/experience.
Thanks.
Blueteeth