Zener diode as a Shunt regulator

Discussion in 'General Electronics Chat' started by hasanz89, May 10, 2016.

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  1. hasanz89

    Thread Starter New Member

    Jul 10, 2014
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    I need help on 12 v adapter with 12-5-2A output Provided with 350 rms output using bridge rectifier. It used a mosfet irf 730 with 400 v what kind of zener utility to use if the desired output is 12-5-2A is 5.1 volt zener diode will satisfied circuit Thankyou
     
  2. crutschow

    Expert

    Mar 14, 2008
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    What is 350 rms output?
    Post a schematic.
     
  3. hasanz89

    Thread Starter New Member

    Jul 10, 2014
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    the rms from 220 volt is 311 volt at rload bridge rectifier,but during the voltage test I found the D3 is alternate to positive?
    if the threshold of irf 730 is 2.0 volt so the drain voltage does not fall below the gate voltage by more than 2.0 volts
    I will try to post a scematics soon,thank you
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    What is a "12-5-2A output"?
     
  5. hasanz89

    Thread Starter New Member

    Jul 10, 2014
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    it's a voltage regulator generated a fixed output from a primer circuit using Mosfet and BJT to maintain a constant 12 volt and 5 volt output with 2 Ampere electric current
     
  6. hasanz89

    Thread Starter New Member

    Jul 10, 2014
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    these is the primary circuit the input iss 220vac
     
  7. Lestraveled

    Well-Known Member

    May 19, 2014
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    This circuit is not isolated from the mains and thus forbidden on this forum.
     
  8. JohnInTX

    Moderator

    Jun 26, 2012
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    Agreed. Closed. Transformerless power supplies are not allowed on AAC per the Terms of Service. If you can pursue the circuit after adding a transformer to isolate the circuit from mains, PM a moderator with the schematic and we will reopen the thread.
    Thanks for your understanding.
     
    Last edited: May 26, 2016
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