Excellent breakdown of the Push-Pull vs PSFB comparison. The commutation path analysis for ZVS is spot-on - that forced current circulation during dead time in PSFB is what makes it predictable across load ranges. I designed a 2kW telecom supply a few years back where we initialy chose Push-Pull for cost reasons, but the unpredictable ZVS behavior at light loads killed our efficiency targets. The volt-second imbalance issue you mentioned was also a constant headach during prototyping tho.
Excellent breakdown of the Push-Pull vs PSFB comparison. The commutation path analysis for ZVS is spot-on - that forced current circulation during dead time in PSFB is what makes it predictable across load ranges. I designed a 2kW telecom supply a few years back where we initialy chose Push-Pull for cost reasons, but the unpredictable ZVS behavior at light loads killed our efficiency targets. The volt-second imbalance issue you mentioned was also a constant headach during prototyping tho.
We are organizing an online discussion about Push-pull, let me know if you would like to join