Diode Model Evalation Manual for LTspice

4,028 views

Published on

Diode Model Evalation Manual for LTspice

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
4,028
On SlideShare
0
From Embeds
0
Number of Embeds
166
Actions
Shares
0
Downloads
47
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Diode Model Evalation Manual for LTspice

  1. 1. Diode Model Evaluation Manual for LTspice<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />1<br />Contents<br />Library Files and Symbol Files Location<br />Forward Characteristic (IV)<br />Capacitance Characteristic (CV)<br />Reverse Recovery Characteristic (Trr)<br />Bee Technologies Inc.<br />25APR2011<br />Japanese Web Site<br />English Web Site<br />
  2. 2. Copy LTspice symbols files from D:modelS3L60_s to C:Program FilesLTCLTspiceIVlibsym<br />Copy LIB files from D:modelS3L60_sto C:Program FilesLTCLTspiceIVlibsub<br />1.Library Files and Symbol Files Location<br />2<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />
  3. 3. 2. Forward Characteristic (IV)<br />Evaluation Circuit<br />Simulation Result<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />3<br />Draw circuit as shown in the figure above. The circuit consists of a DC voltage source V1, a very small resistor R1, and the diode.<br />
  4. 4. 2. Forward Characteristic (IV)<br />Simulation Settings<br />【Reference】 Datasheet<br />Sweep: 0 ~ 2V<br />Select Edit then SPICE Analysis, select DC Sweep and enter the parameters as shown. The Voltage source is V1, that is swept to match the device characteristics informed by the datasheet, from Start value=0 to End value=2V with the Increment=1m.<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />4<br />
  5. 5. 2. Forward Characteristic (IV)<br />Add the diode library by using SPICE Directive, type the file name of the library (.lib S3L60_s.lib) the select OK.<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />5<br />Adding the Library<br />
  6. 6. 3. Capacitance Characteristic (CV)<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />6<br />Draw circuit as shown in the figure above, that consist of a VPULSE V1 as a DC bias source, a VDC Vsense (0V) as a current sensor , and the diode.<br />Evaluation Circuit<br />Simulation Result<br />
  7. 7. 3. Capacitance Characteristic (CV)<br /><ul><li>Right click on the voltage source V1
  8. 8. Select Pulse
  9. 9. Modify the Attributes
  10. 10. Pulse source
  11. 11. Initial voltage=0V
  12. 12. Pulse voltage=600V
  13. 13. Delay time=0
  14. 14. Rise time=1u
  15. 15. Fall time=50n
  16. 16. Pulse width=5u
  17. 17. Period=10u</li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />7<br />Configuring the Pulse Source<br />The maximum DC bias voltage of the capacitance evaluation is set by entering V2=600V, the other parameter are the default value, as shown.<br />
  18. 18. 3. Capacitance Characteristic (CV)<br />Select Transient and enter the parameters as shown (This is the default setting, usually can be use with any diode).<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />8<br />Simulation Settings<br />
  19. 19. 3. Capacitance Characteristic (CV)<br />Right click on the plot pane the select Add Trace, then add the expression: I(V2)/(600V*/1u), to show the capacitance curve (*600V is the V2 value of the pulse source).<br />Click at X axis change the Quantity Plotted from time to V(rev) then set the scale as Left=0.5V, Right=400V in Logarithmic scale<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />9<br />
  20. 20. 4. Reverse Recovery Characteristic<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />10<br />Evaluation Circuit<br />Simulation Result<br />Draw circuit as shown in the figure above, that consist of a VPULSE V1 as a pulse source, a Resistor R1=50, and the diode.<br />
  21. 21. 4. Reverse Recovery Characteristic<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />11<br />Configuring the Pulse Source<br />adjust V2<br />IF<br />IR<br />adjust V1<br /><ul><li>Right click the V1, modify the attributes to PULSE(-9.1 10.8 12n 10n 12n 20u 50u) as V1=-9.1, V2=10.8, TD=12ns, TR=10ns, TF=12ns, PW=20u, PER=50u.
  22. 22. V1(-9.1) is the value near -10V, used to adjust the IR to be -200mA.
  23. 23. V2(10.8) is the value near 10V, used to adjust the IF to be 200mA .
  24. 24. TF (Fall Time) is used to adjust the slope.</li></li></ul><li>4. Reverse Recovery Characteristic<br />Select Transient and enter the parameters as shown (the Stop Time must be over than the pulse width(PW) of the voltage source).<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />12<br />Simulation Settings<br />
  25. 25. 4. Reverse Recovery Characteristic<br />To solve “?s” problem click Tool>Control Panel>Netlist Options then select Covert “µ” to “u”[*].<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />13<br />“?s”<br />
  26. 26. 4. Reverse Recovery Characteristic<br />Left click on the X axis then set the scale to Left=19.96us Right=20.14us and tick=20ns.<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />14<br />
  27. 27. 4. Reverse Recovery Characteristic<br />simulation Result<br />【Reference】 Measurement Waveform<br />The scale is set to match the measurement waveform for easily comparison.<br />All Rights Reserved Copyright (C) Bee Technologies Corporation 2011<br />15<br />

×