I just built my first SMPS to convert 120v to 45-0-45v for my audio amplifier. It works fine and I tested it with 100w 110v Incandescent bulb. it is based on the standard IR2143 circuit (EI33 core with 20+20 turns primary and 12+12 turns secondary). The oscillator is running at about 50 kHz. The circuit uses the standard voltage doubler (120v/240v switch) to produce 340v rectified at the input capacitors.
I am wondering what would it take to make it just 110v without using the voltage doubler?
Will changing the number of primary turns to 10+10 take care of that? Should I change the 2143 frequency as well? Or any other changes?
Thanks for the help!
I am wondering what would it take to make it just 110v without using the voltage doubler?
Will changing the number of primary turns to 10+10 take care of that? Should I change the 2143 frequency as well? Or any other changes?
Thanks for the help!