Prepping for rev B

A project log for Nixie 170 V flyback DC-DC power converter

Design walkthrough and evaluation of a flyback converter from scratch

James WilsonJames Wilson 04/24/2020 at 17:310 Comments

What worked out well with the initial build:

What was a disappointment:

Since everyone is still going nowhere, I sent off a second board revision for manufacturing with a couple of changes:

The efficiency of the converter could be improved by using a lower switching frequency to reduce switching losses. The choice of switching frequency was driven by the limit I chose on inductor current ripple. Lowering the switching frequency will increase the current ripple and increase the minimum load where the converter begins to operate in DCM. It will also precipitate re-evaluating most of the passive component values, so I'll leave this be for the moment.