Rohm Co., Ltd.

Seiji Nakashima

Kenichi Fukumoto

Junichi Itai

Nobuaki Matsui

Ryosuke Kanemitsu

Koji Katsura

Kouji Miyamoto

Shozo Koyanagi

A semiconductor device, includes: first semiconductor element including first and second electrodes; second semiconductor element including third and fourth electrodes; sealing resin covering the semiconductor elements; first, second, third, and fourth terminal portions respectively connected to the first, second, third, and fourth electrodes and exposed from the sealing resin; first island portion where the first semiconductor element is mounted; and second island portion where the second semiconductor element is mounted, wherein four quadrants divided by first imaginary line extending along second direction orthogonal to first direction and second imaginary line extending along third direction orthogonal to both the first and second directions are defined.

Semiconductor device and power conversion device

An LED drive circuit drives an LED module. The LED module has a light-emitting diode, and an identification unit having characteristic information relating to light-emitting characteristics of the light-emitting diode. The LED drive circuit includes a detection unit and a drive circuit. The detection unit is provided for detecting characteristic information, and generates a detection signal that corresponds to the characteristic information. The drive circuit generates drive current by a drive signal supplied according to the characteristic information based on the detection signal, and supplies the drive current to drive the light-emitting diode.

LED drive circuit, LED drive device, and LED drive system

Growing community of inventors

Ukyo-ku Kyoto, Japan

Seiji Nakashima