Hitachi, Ltd.

Hitachi Mizusawa Electronics Co.

Yoshio Miyamoto

Hiroshi Kimura

Akihiko Kanouda

Masami Joraku

Kazuhiro Takizawa

Tetsuya Obara

Makoto Kawamura

A circuit construction comprising a diode and a capacitor is connected to a secondary coil of a thin transformer such as a wire-type transformer. An excitation energy is discharged during a reset time of the transformer, and this excitation energy is accumulated in the capacitor, thereby output voltage is obtained through the capacitor. A direct current output voltages having two outputs is obtained through one transformer. A small volume and a light weight of the transformer, so that a compact and thin power supply apparatus can be obtained. Since a winding ratio of the transformer can be made small, a copper loss of the transformer can be reduced. It is unnecessary to select a higher switching frequency and a manufacturing cost of the power supply apparatus can be reduced.

Power supply apparatus having separate plural outputs

Growing community of inventors

Hitachi, Japan

Yoshio Miyamoto