Colecciones nacionales e internacionales de patentes

1. (WO2018037769) SEMICONDUCTOR DEVICE

Pub. No.:    WO/2018/037769    International Application No.:    PCT/JP2017/025872
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed Jul 19 01:59:59 CEST 2017
IPC: G01R 19/00
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: AKAMA Sadahiro
赤間 貞洋
ONO Hidekazu
小野 秀和
Title: SEMICONDUCTOR DEVICE
Abstract:
This semiconductor device comprises a main switching element (Mtr) and a sense switching element (Str) which is current mirror-connected to the main switching element and through which a sense current flows. The main switching element has a first terminal (T1) and a second terminal (T2) as output terminals, and the sense switching element has a third terminal (T3) connected to the first terminal, and a fourth terminal (T4) through which the sense current flows. The semiconductor device further comprises a sense resistor (23) for detecting the electric potential of the fourth terminal, and an operational amplifier (OP1, OP2, OP3, OP4), the input terminals of which are connected to the second terminal and the fourth terminal. The operational amplifier is configured such that the output thereof feeds back to the input terminals, and this feedback path includes the sense resistor. A higher voltage (VH) can be supplied to the operational amplifier than to the first terminal so that the direction of the sense current flowing to the sense resistor can be switched.