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Thread: Design challenge - switching regulator
face BY : Roman Black email (remove spam text)

Russell, what did you think of my self-excited oscillator
idea? This can be made to startup at 2v and will work
fine to 130v with a simple on/off voltage regulation.

I see so many self-ex switchmode primaries lately when
fixing VCRs. They use one transistor/fet, one optocoupler
and a few passives for the whole primary! You don't need
the expense of a controller chip, unless you need really
tight output voltage regulation.

Russell McMahon wrote:
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<3A6855B9.1485@ezy.net.au> 7bit

See also: www.piclist.com/techref/power/priswitch.htm?key=switching
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Subject (change) Design challenge - switching regulator

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