bobleny Posted November 25, 2010 Report Share Posted November 25, 2010 Is there a way to increase the breakdown voltage of a zener diode? For example, take a 6v zener and combine it with a 1v zener to get a 7 volt zener?Maybe they make some kind of variable zener or an IC that would work like a variable zener?Thanks! Quote Link to comment Share on other sites More sharing options...
KMoffett Posted November 25, 2010 Report Share Posted November 25, 2010 http://www.national.com/ds/LM/LM431.pdfKen Quote Link to comment Share on other sites More sharing options...
Hero999 Posted November 25, 2010 Report Share Posted November 25, 2010 To answer the question exactly, here's how.The LM431 is a better option though. Quote Link to comment Share on other sites More sharing options...
bobleny Posted November 25, 2010 Author Report Share Posted November 25, 2010 Ooo... I like the magical doohickey!Thanks, that should work great!Edit:How do I mark this thread as solved? Quote Link to comment Share on other sites More sharing options...
Hero999 Posted November 25, 2010 Report Share Posted November 25, 2010 There's nothing magical. It's a Vbe multiplier. The zener voltage adds to the transistor's Vbe. When the transistor's base voltage approaches 0.6V, it starts to turn on causing current to be diverted around it away from the Vbe junction.There's no way to mark a thread as solved. You've done all you need to by saying thank you. Quote Link to comment Share on other sites More sharing options...
bobleny Posted November 25, 2010 Author Report Share Posted November 25, 2010 I know it's not magic, I was only joking but thank you for the explanation... Quote Link to comment Share on other sites More sharing options...
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