Re: 1KV buck converter

Bill - the best approach I found for initial power was to tie a capacitor between
the (most) positive rail and the other lead through a diode to the + rail
of the control circuitry. How effective that was I don't remember though.

Hul

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

Newsgroups: sci.electronics.design

On 27/05/2025 10:39 am, Hul Tytus wrote:

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.

Hi Hul - getting Baxandall style inverters to start-up cleanly can be a
problem. The amplitude can overshoot. The 1959 original would "squeg" is
the feed inductor was too big, and you used bipolar transistor switches,
which is something I've never been able to simulate. MOSFET switches
apparently aren't susceptible to this problem.

--
Bill Sloman, Sydney