Re: Zener diode regulator?

From: "John_H" <johnhandwork@xxxxxxxx>
Date: Wed, 01 Feb 2006 17:06:10 GMT

"Jim Drew" <msdei@xxxxxxxxxxx> wrote in message 
news:43e0e7bd$0$8270$6d36acad@xxxxxxxxxxxxxxxxxxxxx
>I am revisiting a problem that was posted a few months ago.  I have tried 
>numerous solutions, but nothing on the complex side of things will work for 
>this application.
>
> The problem is that I need to be able to convert an input voltage varying 
> from 20 volts to 80 volts (at up to 100 amps) to 12 volts (at 500ma to 1 
> amp).

<snip>

Are you able to dissipate 68 watts in this "simple" circuit?  If you're 
supplying 1A through a series element (as opposed to a switcher) you *will* 
disspate at least 68 watts. 


.

References:
- Zener diode regulator?
  - From: Jim Drew

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Re: Zener diode regulator?
... >I am revisiting a problem that was posted a few months ago. ... I have tried>numerous solutions, but nothing on the complex side of things will work for>this application. ... If you're supplying 1A through a series element you *will* disspate at least 68 watts. ...
(sci.electronics.design)
Re: Zener diode regulator?
... numerous solutions, but nothing on the complex side of things will work for this application. ... If you're supplying 1A through a series element you *will* disspate at least 68 watts. ... The circuit probably needs no more than 100ma, but I wanted to have a reserve for future use of LEDs and such. ... I don't think I will need to handle 68 watts of power. ...
(sci.electronics.design)