公开(公告)号：US11171638B2

公开(公告)日：2021-11-09

申请号：US14168388

申请日：2014-01-30

Applicant: DENSO CORPORATION

Inventor： Sho Yamada ,  Yosuke Watanabe ,  Junichi Fukuta ,  Tsuneo Maebara

IPC: H03K17/0412

Abstract: An electronic apparatus is provided which includes switching elements, resonance suppression resistors which have first ends connected to control terminals of the switching elements and second ends having a common connection, an on-drive circuit which has an on-drive resistor and is connected to a drive power circuit, and which is supplied with voltage from the drive power circuit and applies electric charge to the control terminals of the switching elements via the on-drive resistor to turn on the switching elements, and an off-drive circuit which has an off-drive resistor and releases electric charge from the control terminals of the switching elements via the off-drive resistor to turn off the switching elements. A resistance of the off-drive resistor is set to be smaller than a resistance of the resonance suppression resistors. The off-drive circuit releases electric charge from the control terminals of the switching elements not via the resonance suppression resistors.

公开(公告)号：US11728802B2

公开(公告)日：2023-08-15

申请号：US17165504

申请日：2021-02-02

Applicant: DENSO CORPORATION

Inventor： Yosuke Watanabe

IPC: H03K17/0812 ,  H02M1/08 ,  H02M7/5387 ,  H02P27/08

CPC classification number: H03K17/0812 ,  H02M1/08 ,  H02M7/53871 ,  H02P27/08

Abstract: A drive circuit includes a plurality of first control wirings, a plurality of first balance resistors, a first common wiring, a first switch, a plurality of second control wirings, a plurality of second balance resistors, a second common wiring, a second switch, a sensor configured to detect a fault in controlled switches, and a controller configured to control opening and closing of the first switch when the sensor detects no fault, and control opening and closing of the second switch when the sensor detects the fault.

公开(公告)号：US10601417B2

公开(公告)日：2020-03-24

申请号：US16444678

申请日：2019-06-18

Applicant: DENSO CORPORATION

Inventor： Yosuke Watanabe ,  Tomotaka Suzuki

IPC: H03K17/687 ,  H03K17/567 ,  H05K1/02

Abstract: A switching circuit includes a printed circuit board that supports a switching element, a positive power supply circuit, a negative power supply circuit and a driving circuit thereon. The positive power supply circuit generates a positive voltage relative to a GND potential. The negative power supply circuit generates a negative voltage relative to the GND potential. The driving circuit supplies the gate electrode with the positive voltage and the negative voltage when turn on and off the switching element, respectively. The printed circuit board includes wiring as a conducting path extended from the negative power supply circuit to the gate electrode via the driving circuit. The conducting path includes a negative power supply wiring between the negative power supply circuit and the driving circuit. The negative power supply wiring at least partially includes a negative power supply solid pattern.