Half Wave Rectifier: Vi > PIV

  • Thread starter pupul07
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Was wondering what would happen to the output voltage when the input voltage exceeds the PIV/PRV.
 

berkeman

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Was wondering what would happen to the output voltage when the input voltage exceeds the PIV/PRV.
Could you please define your terms, and maybe provide a datasheet for a part? Is PIV peak inverse voltage?
 
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For a single-diode half-wave rectifier going into a capacitor filter, the peak repetitive inverse/reverse voltage on the diode is TWICE the peak input ac voltage. If you exceed the PIV/PRV and short the diode, you could damage other components (transformer, etc.) and maybe start a fire. If the diode opens up, your output dc voltage goes to zero. This could even happen if you don't exceed PIV/PRV.

Bob S
 
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