Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/037769
Kind Code:
A1
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.
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Inventors:
AKAMA SADAHIRO (JP)
ONO HIDEKAZU (JP)
ONO HIDEKAZU (JP)
Application Number:
PCT/JP2017/025872
Publication Date:
March 01, 2018
Filing Date:
July 18, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01R19/00
Foreign References:
| JP2005164381A | 2005-06-23 | |||
| JPS58124308A | 1983-07-23 | |||
| JPS5957017U | 1984-04-13 | |||
| US5977751A | 1999-11-02 | |||
| JPH07229928A | 1995-08-29 | |||
| JPH0886818A | 1996-04-02 | |||
| JPH08334534A | 1996-12-17 | |||
| JP2002209340A | 2002-07-26 |
Attorney, Agent or Firm:
JIN Shunji (JP)
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