Fig. 1. Active clamp flyback converter.
Fig. 2. Key waveforms of boundary conduction mode active clamp flyback converter.
Fig. 3. Operation modes of active clamp flyback converter.
TABLE Ⅰ COMPARISON OF Si-FET AND GaN-FET
Fig. 5. Resonant equivalent circuit during M2 conduct.
Fig. 7. Total loss comparison according to the number of turns and switching frequency at 5:1 turn ratio.
Fig. 8. Efficiency according to turn ratio and switching frequency.
Fig. 9. 65W-Prototype of boundary conduction mode active clamp flyback converter(53.3mm x 54.5mm x 20mm).
Fig. 11. Efficiency by load of boundary conduction mode active clamp flyback converter according to input voltage.
Fig. 10. Steady state key experiment waveforms of boundary conduction mode active clamp flyback converter according to input voltage.
Fig. 4. Loss comparison of Si-FET and GaN-FET.
Fig. 6. Active clamp flyback converter with LC filter.
TABLE Ⅱ EQUATIONS FOR LOSS ANALYSIS
TABLE Ⅲ KEY PARAMETERS APPLIED TO THE BCM ACF CONVERTER
References
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