公开(公告)号：US12062904B2

公开(公告)日：2024-08-13

申请号：US17496593

申请日：2021-10-07

申请人： DENSO CORPORATION

发明人： Jun Fukuhara

IPC分类号： H03F1/02 ,  G01R19/00 ,  H02H1/00 ,  H02H7/20 ,  H03F3/45

CPC分类号： H02H7/20 ,  G01R19/0092 ,  H02H1/0007 ,  H03F3/45475 ,  H03F2200/426

摘要： A current sense circuit includes channels a detection terminal, a feedback circuit and third-type switches. The channels respectively have first-type switches and second-type switches. Each of the first-type switches supplies an electric power to a load when the first-type switch is turned on. The second-type switches are respectively connected to the first-type switches in parallel, and respectively detect currents flowing through the first-type switches. The detection terminal is connected to the second-type switches. The feedback circuit includes a single operational amplifier having a first input terminal and a second input terminal. The first input terminal is connected to respective electrodes of the first-type switches close to the load. The second input terminal is connected to respective electrodes of the second-type switches close to the detection terminal. The third-type switches are connected to the electrodes of the first-type switches and the first input terminal.

公开(公告)号：US10217734B2

公开(公告)日：2019-02-26

申请号：US15442884

申请日：2017-02-27

申请人： DENSO CORPORATION

发明人： Jun Fukuhara

IPC分类号： H01L27/02 ,  H02H9/04 ,  H02H9/00 ,  H03K17/082

摘要： In a semiconductor device, a control circuit controls a potential difference of a switching element between a first terminal connected to a power source node and a second terminal connected to a first reference node. A first clamping circuit is connected between the first terminal and a control terminal of the switching element and is energized by a voltage equal to or higher than a first clamp voltage. A second clamping circuit is connected between the control terminal and the first reference node and clamps the potential difference to a second clamp voltage lower than the first clamp voltage. A third clamping circuit is connected between the control terminal and the second terminal. The control unit activates the second clamping circuit when a load current is equal to or greater than a predetermined threshold voltage, and activates the third clamping circuit after a predetermined time period elapses.

公开(公告)号：US11848325B2

公开(公告)日：2023-12-19

申请号：US17524071

申请日：2021-11-11

申请人： DENSO CORPORATION

发明人： Jun Fukuhara

IPC分类号： H01L27/088 ,  H03K17/082 ,  H01L25/065 ,  H01L25/18

CPC分类号： H01L27/088 ,  H03K17/0822 ,  H01L25/0655 ,  H01L25/18

摘要： A load drive device includes a semiconductor element and a current detection resistor. The semiconductor element includes a first main electrode provided on a front surface side and having a higher potential and a second main electrode provided on a back surface side opposite to the front surface and having a lower potential than the first main electrode. The second main electrode is divided such that the semiconductor element includes a main element that supplies electric power to a load in response to the main element being turned on and a sense element that detects a current. The current detection resistor is connected in series to the sense element and provided between the second main electrode of the sense element and the second main electrode of the main element.