| 摘要 |
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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