Hi all,
After successfully designed and build a 4kW basic full-bridge non-resonant SMPS, I would like to move further. The way to go would be a full-bridge constant-frequency phase-shift ZVS power supply controlled by UCC3895 from Unitrode (Texas Instruments)
In the document SLUU069A (http://www-s.ti.com/sc/psheets/sluu069a/sluu069a.pdf), there is a schematic of a power supply, and that would be my starting point. I understand nearly everytning, but I will need help with one, probably most important design step: Resonant components (transformer's serial inductor value and MOSFET parallel capacitors value). First, I though that we only need to connect some parallel capacitors to MOSFETs to obtain a resonant circuit with transformer's leakage inductance. But, there are no parallel capacitors in SLUU069A datasheet, but there is a 0,47uH serial inductance in series with the transformer's primary winding.
Could anybody explain these things for me, please?
After successfully designed and build a 4kW basic full-bridge non-resonant SMPS, I would like to move further. The way to go would be a full-bridge constant-frequency phase-shift ZVS power supply controlled by UCC3895 from Unitrode (Texas Instruments)
In the document SLUU069A (http://www-s.ti.com/sc/psheets/sluu069a/sluu069a.pdf), there is a schematic of a power supply, and that would be my starting point. I understand nearly everytning, but I will need help with one, probably most important design step: Resonant components (transformer's serial inductor value and MOSFET parallel capacitors value). First, I though that we only need to connect some parallel capacitors to MOSFETs to obtain a resonant circuit with transformer's leakage inductance. But, there are no parallel capacitors in SLUU069A datasheet, but there is a 0,47uH serial inductance in series with the transformer's primary winding.
Could anybody explain these things for me, please?