Hello!
I have a dc/dc converter which is build with UCC2803.The power level is about 15W(15V, 1A all outputs together).It runs at 270kHz, hard-switching, and EMI/RFI and efficiency isn't so great.
The converter is a flyback topology and the stress over the main switch is significant.
I want to change the hard switching technique with the soft one, but I don't want to use a dedicated active clamp or resonant or phase shift controller.
I intend to use the UCC2803 in conjunction with an auxiliary circuit that assure ZVS for the main switch.
Personal, I think that active clamp looks very attractive.
Does anyone build a converter that achieve ZVS using regular PWM controllers (including eventually the logic control circuit for the active clamp switch)?
Could anyone give me some informations or pdf files or links with interesting auxiliary circuits (not IC's) dedicated for single ended converters (flyback, forward) that assure soft switching?
Regards,
Florin
I have a dc/dc converter which is build with UCC2803.The power level is about 15W(15V, 1A all outputs together).It runs at 270kHz, hard-switching, and EMI/RFI and efficiency isn't so great.
The converter is a flyback topology and the stress over the main switch is significant.
I want to change the hard switching technique with the soft one, but I don't want to use a dedicated active clamp or resonant or phase shift controller.
I intend to use the UCC2803 in conjunction with an auxiliary circuit that assure ZVS for the main switch.
Personal, I think that active clamp looks very attractive.
Does anyone build a converter that achieve ZVS using regular PWM controllers (including eventually the logic control circuit for the active clamp switch)?
Could anyone give me some informations or pdf files or links with interesting auxiliary circuits (not IC's) dedicated for single ended converters (flyback, forward) that assure soft switching?
Regards,
Florin