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Old 30th December 2007, 08:40 AM   #1
Goat is offline Goat  South Africa
diyAudio Member
Join Date: Aug 2007
Default SMPS simulating!!


could anyone please tell me of a way to simulate a SMPS, I have been try frantically with PSPICE but it keeps throwing errors about things such as unmodeled pins,etc.

I cant find an SG3524, but found a SG1524. If anyone could please let me know of a way, even if its a suggestion of another simulation program. I dont mind using SG3524/SG1524/TL494
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Old 30th December 2007, 11:58 AM   #2
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Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Look up Switchercad (LT SPICE) on Linear Tech's website --- -- and there is a user group on Yahoo.

National Semi and On-Semi also have CAD programs for their own proprietary chips. Texas Instruments has a beta for their version of SwitcherPro -- you have to register to use this --

On-Semi's software is a version of Power 4-5-6 for their controller chips.
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Old 30th December 2007, 03:28 PM   #3
Goat is offline Goat  South Africa
diyAudio Member
Join Date: Aug 2007
Thanks, will check that out, at the moment just excluded the PWM part of the SMPS and testing the output circuitry (inductor,switching devices, filter cap) using PSPICE, but i had to use just a straight square wave instead of the regulation. At least i have an idea if it may work with what i know now. Will let you know if I have any other issues
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Old 30th December 2007, 03:28 PM   #4
Goat is offline Goat  South Africa
diyAudio Member
Join Date: Aug 2007
I seem to still be having an issue finding anything, but thanks for the help anyway. Will probably just build the thing and pray that it works
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