Power supply simulating problem

8409513 · 29th June 2012, 11:30 AM

I am designing 300W power supply with 300V output. my design based on tl494 . I used it in Boost topology . I want to have 300V output . so I calculated the parameters . but when I simulated it in LTspice . the output voltage was aboat 190V !!! I changed many parameters but the output did't changed anymore. SO I don't now what to do!!! plz check my circuit and tell my what is wronge with it .

MarianB · 29th June 2012, 11:53 AM

What circuit?

8409513 · 30th June 2012, 07:11 AM

Sorry!!!!

gootee · 03:31 AM

You might want to include the symbol files and models for the ICs. Before re-uploading a zip file, try putting it into a new folder, unzip it, run LTSpice, and make sure that everything that's needed has been included, i.e. it displays and runs OK.

It would also be a good idea to grab the LTSpice schematic screen image to the clipboard (Tools-->Copy Bitmap to Clipboard) and then paste it into Paint and then save it as a jpg or png and then post it here. Not everyone has LTSpice.

29th June 2012, 11:30 AM	#1
8409513 diyAudio Member Join Date: May 2012	Power supply simulating problem I am designing 300W power supply with 300V output. my design based on tl494 . I used it in Boost topology . I want to have 300V output . so I calculated the parameters . but when I simulated it in LTspice . the output voltage was aboat 190V !!! I changed many parameters but the output did't changed anymore. SO I don't now what to do!!! plz check my circuit and tell my what is wronge with it .

4th July 2012, 03:27 AM	#4
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	You might want to include the symbol files and models for the ICs. Before re-uploading a zip file, try putting it into a new folder, unzip it, run LTSpice, and make sure that everything that's needed has been included, i.e. it displays and runs OK. It would also be a good idea to grab the LTSpice schematic screen image to the clipboard (Tools-->Copy Bitmap to Clipboard) and then paste it into Paint and then save it as a jpg or png and then post it here. Not everyone has LTSpice. Last edited by gootee; 4th July 2012 at 03:31 AM.

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29th June 2012, 11:53 AM	#2
MarianB diyAudio Member Join Date: Jul 2011 Location: Romania	What circuit?