Re: 1KV buck converter

Bill - there was some talk here about a power supply I was working on. It used a pnp transistor
driven by 2 capacitors and a diode to switch a solenoid style inductor. Efficiency was about 80%. This
was two or three years ago. Initial starting powrer can be a puzzler.

Hul


Bill Sloman <bill.sloman@ieee.org> wrote:

Newsgroups: sci.electronics.design

On 24/05/2025 1:05 am, john larkin wrote:

 
https://www.dropbox.com/scl/fi/f64mv46qk4g4nca00bgoe/1KV_Buck.jpg?rlkey=f0qnaliz7nyoowe6w4wx2gkua&raw=1

Anther one of John Larkin's pencil sketches - no resistances, no
inductances or capacitances and part numbers only for the transistors.

At least with an LTSpice .asc file you get that stuff automatically.

And you get some hint at the switching spikes, which can be nasty.

--
Bill Sloman, Sydney