Then, could you recommend a good way to make 1kV to 2kV output with 5V DC input?You’ll find a transformer like that if you search for “flyback transformer”, but as you want some unusual output voltage (you’ll find 5V and 12V off the shelf) you will have to wind it yourself.
There are so many good, cheap drivers ICs these days that the blocking oscillator is well past its sell-by date, and using a bipolar transistor in a switching power supply is distinctly 1990s.
This is not an easy or trivial task. The power levels we are talking about can be lethal. You are talking about constructing a transformer with a turns ratio with each turn of the primary needing 200 turns on the secondary. With a 1mH primary, the secondary will have an inductance of 40 Henries, which I consider to be an impossible requirement. In addition the output current will be a great deal less than the input current. The defining principle here is that the power out must be less than the power in. I think this is a pipe dream unless you can come up with more information about your actual requirements. Even if we get past that hurdle you will be better off buying an HV supply for your needs. Building your own is just not practical.Then, could you recommend a good way to make 1kV to 2kV output with 5V DC input?
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