Mitsuba Corporation

Asahi Kasei Microdevices Corporation

Gunma University

Yoshihisa Yamada

Haruo Kobayashi

Fumiaki Koshio

Takahiko Ogane

Masamichi Ishii

Iwao Tsurubuchi

Wataru Kusumoto

Toshio Sugiyama

Hiroaki Okada

Ibuki Mori

Masashi Kono

Daisuke Semba

Yuya Motohashi

A controller () includes a primary molded portion () in which a resin molded body () is integrated with a bus bar () using a resin, causing one end of the bus bar () to function as a connector terminal which protrudes into connector portions () to (), and configured to form electronic component disposition portions (a) to (d) in which an electronic component () is disposed and a power device disposition portion () in which a power device () is disposed, and a secondary molded portion () integrated with the electronic component (), the power device (), and the primary molded portion () in a state in which the electronic component () is disposed at the electronic component disposition portions (a) to (d) and the power device () is disposed at the power device disposition portion ().

Controller and manufacturing method thereof

The invention provides a technique to widely spread the frequency spectrum of switching noise generated by a switching action and to reduce the noise level at a particular frequency. A switching regulator (A) includes a computing unit with computing function. First, in the computing unit, a pulse-width-modulation processing unit (PWM) () performs pulse-width-modulation processing of receiving a feedback signal corresponding to the output of a detectorto determine an on-duty cycle of a pulse signal. Subsequently, for the signal and data obtained by the PWM () to be subjected to further modulation processing for spectrum spreading, a branching processing is performed by making changing-over unit () randomly select asynchronous-modulation processing unit (ASM) () or pulse-position-modulation processing unit (PPM). When the PPM is selected, another branching processing is performed by making the changing-over unit () select a first PPM () or a second PPM () depending on the on-duty cycle.

Switching regulator

Growing community of inventors

Kiryu, Japan

Yoshihisa Yamada