Dc-dc converter

Abstract

Abstract PURPOSE:To reduce reverse currents, and to minimize the generation of noises by mounting an energy feedback circuit to the input side consisting of a secondary winding for a transformer and a diode. CONSTITUTION:In a step-down chopper type switching circuit, DC voltage is applied between input terminals 1-1', driving pulses are applied to a base for a switching transistor (Tr) 4 from a control circuit 8 and the Tr 4 is ON-OFF operated, and DC voltage is generated between output terminals 2-2' and load 9 is supplied with power. In this case, a primary winding 11 for a transformer 10 is connected in series on the anode side of a flywheel diode 5, a secondary winding 12 is connected to the input terminal 1 through a diode 13, and a capacitor 14 is connected in parallel with an input capacitor 3 to a line to the input terminal 1 from the secondary winding 12. Accordingly, the primary winding 11 for the transformer 10 is connected in series with said diode 5, thus preventing the flowing of large reverse currents through said diode 5 by the counter electromotive force of the primary winding 11.

Inventors

• 👤 Satoshi Yamada
• 👤 聡 山田

Bibliographic Details