Quasi-resonant diode drive current source

Details Quasi-resonant diode drive current source Quasi-resonant diode drive current source

1992-04-24

1994-02-15

Epps, Georgia Y.

Coherent light generators

Particular component circuitry

Optical pumping

372 25, 372 33, 372 92, H01S 300

Patent

active

052873722

ABSTRACT:
A quasi-resonant diode drive current source provides high power pulsed current that drives light emitting diodes, and the like. The pulsed output current of the quasi-resonant diode drive current source is sensed, and is regulated by a control loop to a level required by the light emitting diodes. In a specific embodiment of the invention, a zero-current-switched full wave quasi-resonant buck converter is described that provides a high amplitude pulsed output current required to drive light emitting pump diodes used in a solid state diode pumped laser. The use of a quasi-resonant converter as a pulsed current source provides a much higher conversion efficiency than conventional laser current sources. This higher efficiency results in less input power drawn from a power source and cooler operation, resulting in a higher reliability current source.

REFERENCES:
Hoang Le-Huy, "A Current-Controlled Quasi-Resonant Converter for Switched-Reluctance Motor", IEEE Transactions on Industrial Electronics, vol. 38, No. 5, Oct. 1991.
Raymond B. Ridley, "Multi-Loop Control for Quasi-Resonant Converters," IEEE Transactions on Power Electronics, vol. 6, No. 1, Jan. 1991.

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