Non-dissipative snubber circuit for high-efficiency switching po

Details Non-dissipative snubber circuit for high-efficiency switching po Non-dissipative snubber circuit for high-efficiency switching po

1987-10-07

1988-07-26

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

363 50, 363 56, 363 63, G05F 1569

Patent

active

047603240

ABSTRACT:
A high efficiency switching power supply includes a non-dissipative snubber circuit which provides dual polarity power utilized by a driver of the switching transistor. The snubber circuit, protecting the switching transistor in the supply and utilizing an inductor for storing energy normally dissipated as heat, charges filter capacitors with the stored energy to provide the dual polarity power sources. Zener diodes, paralelling the filter capacitors, regulate the power sources to provide output voltages sufficient for the driver to ensure saturation and cut-off of the switching transistor. The power sources allow the driver to directly drive the switching transistor for a high efficiency, small size, low cost and lightweight switching power supply.

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Whitcomb, "Designing Non-Dissipative Current Snubbers for Switched Mode Converters", Proceedings of the 6th National Solid-State Power Conversion Conference, May 1979, pp. B1-1 to B1-6.
"High-Frequency Switching Power Supplies: Theory and Design"; N.Y.; George Chryssis; McGraw-Hill Book Co., 1984; pp. 60-63.
"Design of Solid-State Power Supplies, 2nd Edition"; N.Y.; E.R. Hnatek; Van Nostrand Reinhold Co., 1981; pp. 290-292.
"Voltage Regulator Handbook"; National Semiconductor Corp., Santa Clara, CA, 1981; pp. 10-151 to 154.

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