Leakage current diode

  • #1
Summary:
leakage current in a diode with ltspice simulation
hello I m Trying to simulate leakage current, say from a reverse bias diode I'm fairly
how i can do it
 

Answers and Replies

  • #2
phyzguy
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Summary:: leakage current in a diode with ltspice simulation

hello I m Trying to simulate leakage current, say from a reverse bias diode I'm fairly
how i can do it
The model should have a parameter Roff that allows you to put in an off resistance in parallel with the ideal diode.
 
  • #3
The model should have a parameter Roff that allows you to put in an off resistance in parallel with the ideal diode.
how please
1624131509721.png
 
  • #4
phyzguy
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It will be in the .model statement which defines the diode model. Do you have the .net file created by LTSpice? It will be a text file which is the input to the SPICE simulator.
 
  • #5
no i i have' nt .net file for this circuit but how i can I input the file please ?
 
  • #6
Baluncore
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Diode_Leakage_Schematic.png

Diode_Leakage_.png


Attached are LTspice .asc and .plt files. Remove the .txt extension so you can run them.
Right click on diode to change model, or Left click over the diode terminal to plot current.
 

Attachments

  • Diode_Leakage_1.asc.txt
    504 bytes · Views: 20
  • Diode_Leakage_1.plt.txt
    325 bytes · Views: 19
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  • #7
phyzguy
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I don't have that RB411D diode in my version of LTSpice, but I substituted another Zener, 1N750. What you want to do is when you select the diode, you copy the model and paste the model as a .model SPICE directive on the schematic. Then you can edit the model parameters. The easiest way to adjust the diode leakage is to adjust the Is parameter. I did that in this asc file.
 

Attachments

  • Diode_Leakage_2.asc.txt
    678 bytes · Views: 16
  • #8
Baluncore
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The RB411D is a Schottky rectifier diode, not a Zener diode.
Notice the suBtle schematic symbol 'Z' of the Zener cathode, and the 'S' of the Schottky cathode.
 

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