Interleaved synchronous flyback converter with high efficiency o

Details Interleaved synchronous flyback converter with high efficiency o Interleaved synchronous flyback converter with high efficiency o

1999-08-02

2000-02-29

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 21, H02M 3335

Patent

active

060317477

ABSTRACT:
The present invention provides a switching power supply which operates at a high efficiency over a wide operating load range. When the output power is below a first power level, the first power converter stage operates in a hard-switching mode and the second power converter stage is off. When the output power is greater than the first power level and less than a second power level, the first power converter stage operates in a soft-switching mode and the second power converter stage is off. When an output power is greater than the second power level, the first power converter stage operates in a soft-switching mode and the second power converter stage operates in a soft-switching mode.

REFERENCES:
patent: 5594629 (1997-01-01), Steigerwald
patent: 5796595 (1998-08-01), Cross
patent: 5875103 (1999-02-01), Bhagwat et al.
patent: 5959438 (1999-09-01), Jovanovic et al.
Kirchenberger; Fischer; Schroder, "Analysis of a Constant Frequency Series-Parallel Multiresonant converter for High Power and Incoreased Output voltages", IEEE Electronic Library, pp. 76-82, 1993.
Wei and Ioinovic, "DC-DC Zero Voltage Transiton Converter with PWM Control and Low Stresses on Switches", IEEE Electronic Library, pp. 523-529, 1995.
Heng and Oruganti, "Family of Two Switch Soft Switched Asymmetrical PWM DC/DC Converters", IEEE Electronic Library, pp. 85-94, 1994.
Nakaoka; Chibani; Yonemori; Ueda; and Ogino, "Resonant Flyback Switched Mode DC-DC Converters Using Static Induction Power Devices", IEEE Electronic Library, pp. 466-474, 1988.

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