Self-calibrated valley switching for wide range Flyback active-clamp DC-DC converter

Sébastien Larousse (1, 2) , Hubert Razik (2) , Rémy Cellier (1) , Nacer Abouchi (1) , Philippe Volay

1 INL - CSH - INL - Conception de Systèmes Hétérogènes
2 MIS - Ampère, Département Méthodes pour l'Ingénierie des Systèmes

In this paper, we describe a valley-switching self-calibration strategy, which permits to minimize commutation loss in Flyback active-clamp converters working in valley switching mode. This strategy allows an optimal behavior of the converter commutation regardless of its parasitic drain-source capacitance behavior. This strategy can be applied on wide input voltage range Flyback active-clamp converters, in which the soft switching cannot be maintained on the whole working range. Our strategy has been tested on a 17 V to 130 V input voltage converter with a 12 V-40W output. Efficiency increases up to 2% at high input voltages compared to standard converter control strategy.

Domaines: Energie électrique

Sébastien Larousse, Hubert Razik, Rémy Cellier, Nacer Abouchi, Philippe Volay. Self-calibrated valley switching for wide range Flyback active-clamp DC-DC converter. IPEMC-ECCE Asia, May 2016, Hefei, China. ⟨10.1109/IPEMC.2016.7512447⟩. ⟨hal-01387638⟩