Diode Model Evalation Manual for LTspice

1. Diode Model Evaluation Manual for LTspice All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 1 Contents Library Files and Symbol Files Location Forward Characteristic (IV) Capacitance Characteristic (CV) Reverse Recovery Characteristic (Trr) Bee Technologies Inc. 25APR2011 Japanese Web Site English Web Site

2. Copy LTspice symbols files from D:odel3L60_s to C:rogram FilesTCTspiceIVibym Copy LIB files from D:odel3L60_sto C:rogram FilesTCTspiceIVibub 1.Library Files and Symbol Files Location 2 All Rights Reserved Copyright (C) Bee Technologies Corporation 2011

3. 2. Forward Characteristic (IV) Evaluation Circuit Simulation Result All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 3 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.

4. 2. Forward Characteristic (IV) Simulation Settings 【Reference】 Datasheet Sweep: 0 ~ 2V 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. All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 4

5. 2. Forward Characteristic (IV) Add the diode library by using SPICE Directive, type the file name of the library (.lib S3L60_s.lib) the select OK. All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 5 Adding the Library

6. 3. Capacitance Characteristic (CV) All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 6 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. Evaluation Circuit Simulation Result

8. Select Pulse

9. Modify the Attributes

10. Pulse source

11. Initial voltage=0V

12. Pulse voltage=600V

13. Delay time=0

14. Rise time=1u

15. Fall time=50n

16. Pulse width=5u

17. Period=10uAll Rights Reserved Copyright (C) Bee Technologies Corporation 2011 7 Configuring the Pulse Source The maximum DC bias voltage of the capacitance evaluation is set by entering V2=600V, the other parameter are the default value, as shown.

18. 3. Capacitance Characteristic (CV) Select Transient and enter the parameters as shown (This is the default setting, usually can be use with any diode). All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 8 Simulation Settings

19. 3. Capacitance Characteristic (CV) 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). 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 All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 9

20. 4. Reverse Recovery Characteristic All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 10 Evaluation Circuit Simulation Result 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.

22. V1(-9.1) is the value near -10V, used to adjust the IR to be -200mA.

23. V2(10.8) is the value near 10V, used to adjust the IF to be 200mA .

25. 4. Reverse Recovery Characteristic To solve “?s” problem click Tool>Control Panel>Netlist Options then select Covert “µ” to “u”[*]. All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 13 “?s”

26. 4. Reverse Recovery Characteristic Left click on the X axis then set the scale to Left=19.96us Right=20.14us and tick=20ns. All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 14

27. 4. Reverse Recovery Characteristic simulation Result 【Reference】 Measurement Waveform The scale is set to match the measurement waveform for easily comparison. All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 15