PIC driving Adjustable Voltage Regulator

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  1. - 6th June 2007, 15:26 #1
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    sougata
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    Default You are loosing the LM317 voltage regulation

    Hi,

    Look at this article here http://www.elecdesign.com/Articles/I...rticleID=13077 . I hope no explanations are necessary.
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    Sougata
  2. - 6th June 2007, 16:45 #2
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    Hi Flotul

    I already saw a '317 as a couple of KHz PWM amplifier ( yes ON/OFF !!! ) ... OK ... precisely ON/1.25v ...

    Seems it's also already used in classA amplifiers !!! ( see National Datasheet )

    Just have a nice filtering for the PWM out of the Pic and it will work just as you want !!!

    Alain
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  3. - 6th June 2007, 21:00 #3
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    Default ?

    Alain,

    I downloaded the datasheet and quickly read it.

    Could you give me a little more info about what you mean by "a couple of kHz amplifier"?

    Sougata,

    Your link just gives everything I need . I thought I could make something with less components; I'm very short in space.
    Roger
  4. - 6th June 2007, 21:05 #4
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    Hi, flotul

    I just mean the ref pin is driven by a 1kHz 12v p.p. square wave !!!

    The use is a variable switching supply for model Trains ...

    Alain
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