What's your problem with the circuit, it's rather straightforward.
1. A self-oscillating flyback converter
2. A transistor to speed up switch-off operation
.
The problem may be that classical electronic circuits like the simple one-transistor blocking oscillator aren't taught any more today, people apparently can't think of making an electronic circuit without an "IC", e.g. a 555. https://en.wikipedia.org/wiki/Blocking_oscillator
A transformer is a transformer. Audio, pulse, etc. are just applications involving a number of typical design parameters.this type of circuit needs a pulse transformer ? or audio transformer
From the options listed by xenos I would prefer the photovoltaic opto coupler if switching speed and isolation are sufficient. A recent type with good switching behaviour is e.g. Vishay VOM1271.
Sounds like a really big FET. Specified ton with 200 pF gate capacitance is 50 µs. But I agree that the solution may be insufficient for some applications.Switching speed and output voltage (8v for vom1271 , i have tested it , around 20ms to turn on ) is not enough
Yes, unfortunately.assembling a circuit is much more expensive and time consuming
Sounds like a really big FET. Specified ton with 200 pF gate capacitance is 50 µs. But I agree that the solution may be insufficient for some applications.
Do you intend to apply the input signal directly to the DC/DC converter? I fear, the response time with an industry standard DC/DC converter could be larger than 20 ms. If response time matters, you'll go for a permanent driver supply through DC/DC and an optocoupler for the control signal.
Yes, unfortunately.
This is way to do it.. If response time matters, you'll go for a permanent driver supply through DC/DC and an optocoupler for the control signal.
The problem may be that classical electronic circuits like the simple one-transistor blocking oscillator aren't taught any more today, people apparently can't think of making an electronic circuit without an "IC", e.g. a 555. https://en.wikipedia.org/wiki/Blocking_oscillator
This is way to do it.
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