Denso Corporation

Nippon Soken, Inc.

Keiichi Ando

Koji Kawasaki

Seiji Iyasu

Yuichi Handa

Kimikazu Nakamura

Shinya Goto

Shuji Kurauchi

Kaoru Koketsu

Yuki Yamada

A power supply device includes a transformer, a primary semiconductor component, a secondary semiconductor component, a choke coil and a circuit board. Electronic components which include the transformer, the primary semiconductor component, the secondary semiconductor component, and the choke coil, are stacked in pairs, in a normal direction of a board. One pair forms a first stacked body and another pair to forms a second stacked body. A circuit board is interposed between the one pair of electronic components which forms the first stacked body, and also between the other pair of electronic components which forms the second stacked body.

Power supply device

In an electronic apparatus, a case houses an electronic apparatus main body and is electrically conductive. A terminal block is attached to a case wall of the case. In the terminal block, a main body portion is composed of an insulating material. An external terminal is inserted into a through-hole formed in the case wall, and is connected to the electronic apparatus main body. A capacitor is disposed inside the main body portion. An elastic member is disposed inside the main body portion, is composed of a conductive material, is interposed at least one of between the capacitor and the external terminal, and between the capacitor and the case wall, and fixes the capacitor inside the main body portion by pressing the capacitor. The capacitor and the elastic member configure a filter circuit that allows a noise current included in the external terminal to flow to the case wall.

Electronic apparatus

In a DC-to-DC converter which can convert DC power supplied to a first voltage system circuit, having first and second switching elements, to DC power at a boosted voltage, produced from a second voltage system circuit having third and fourth switching elements, with conversion performed based on control of a switching sequence of the switching elements, the sequence is designed such that switch-off of each of the first and second switching elements occurs only when the current flowing in the switching element is close to zero, thereby suppressing occurrence of voltage surges at switch-off.

Method of controlling DC-to-DC converter whereby switching control sequence applied to switching elements suppresses voltage surges at timings of switch-off of switching elements

Growing community of inventors

Kariya, Japan

Keiichi Ando