公开(公告)号：US20170192038A1

公开(公告)日：2017-07-06

申请号：US15316595

申请日：2015-08-07

Applicant: DENSO CORPORATION

Inventor： Ippei KAWAMOTO

IPC: G01R15/14

CPC classification number: G01R15/146 ,  G01R1/203 ,  G01R31/3696 ,  H01C1/014 ,  H01C1/14 ,  H01C13/00

Abstract: A shunt resistor, at least a part of which has a resistive element with pre-set resistivity, is configured to bridge between two electrodes and detect a current value of a current flowing between the electrodes by detecting a voltage drop in the resistive element. The shunt resistor includes two connecting parts affixed to the electrodes via a conductive adhesive, respectively, and the connecting parts electrically connected to the affixed electrodes, a bridging part bridging between the connecting parts by being extended from one of the connecting parts to the other one of the connecting parts, and two bonding wires used to detect a voltage drop in the resistive element. The bonding wires are bonded to the bridging part.

公开(公告)号：US20170244246A1

公开(公告)日：2017-08-24

申请号：US15439050

申请日：2017-02-22

Applicant: DENSO CORPORATION

Inventor： Ippei KAWAMOTO

IPC: H02J1/00 ,  B60L11/18

CPC classification number: H02J1/00 ,  B60L11/18 ,  H02J7/0029 ,  H02J2007/0039

Abstract: A load driving device includes a switching element, a detector, a determination portion, a controller, and a threshold set portion. The switching element is arranged between a voltage source and a load, or between the load and a ground. The switching element is turned on to supply electric power from the voltage source to the load. The detector detects a current flowing in the switching element. The determination portion compares a detection value of the detector and a threshold value, and determines whether an overcurrent flows in the switching element. The controller controls the switching element based on a determination result of the determination portion. The threshold set portion sets the threshold value to a higher value as voltage of the voltage source is higher. As such, responsiveness of the load driving device is improved and the switching element is protected when a short-circuiting occurs.

公开(公告)号：US20190007034A1

公开(公告)日：2019-01-03

申请号：US15980797

申请日：2018-05-16

Applicant: DENSO CORPORATION

Inventor： Satoshi NAKAI ,  Ippei KAWAMOTO

IPC: H03K5/1252 ,  H03K21/08 ,  G06F1/08

Abstract: A clock signal generator circuit includes a CR oscillator part, which outputs a clock signal having a frequency corresponding to a time constant determined by a capacitor and a resistor, and a frequency varying part. The frequency varying part includes a counter for performing a counting operation and varies a frequency of the clock signal by varying a resistance value of the resistor in correspondence to a count value of the counter. The resistor of the CR oscillator part includes plural resistive elements, one terminal of which are connected to a common node. The frequency varying part includes tri-state buffers, input terminals of which are connected in common and output terminals of which are connected to other terminals of the resistive elements, respectively, and varies the resistance value of the resistor by switching over states of the buffers in correspondence to the count value.

公开(公告)号：US20230326817A1

公开(公告)日：2023-10-12

申请号：US18334625

申请日：2023-06-14

Applicant: DENSO CORPORATION

Inventor： Noboru NAGASE ,  Ippei KAWAMOTO ,  Toshihiro FUJITA ,  Atsushi SAITO ,  Hideki KABUNE

IPC: H01L23/08 ,  H01L23/14 ,  H01L23/29 ,  H01L23/495

CPC classification number: H01L23/08 ,  H01L23/14 ,  H01L23/293 ,  H01L23/49568

Abstract: A semiconductor package includes semiconductor elements, a lead frame, a crosslinked member, and sealing resin. Each of the semiconductor elements has a first surface and a second surface located on a side opposite to the first surface. The lead frame has a mounting portion and a connected portion. At least one of the semiconductor elements mounts on the mounting portion. The connected portion is separated from the mounting portion. The crosslinked member is connected to the second surface of at least one of the semiconductor elements and the connected portion to electrically connect at least one of the semiconductor elements and the connected portion. The sealing resin is electrically insulated and covers a portion of the lead frame, the semiconductor elements and the crosslinked member. At least one of the semiconductor elements is different from another one of the semiconductor elements in element size or power consumption.

公开(公告)号：US20170294908A1

公开(公告)日：2017-10-12

申请号：US15517327

申请日：2015-10-13

Applicant: DENSO CORPORATION

Inventor： Ippei KAWAMOTO

IPC: H03K17/082 ,  H01L27/04 ,  H01L29/78 ,  H03K17/284

CPC classification number: H03K17/0822 ,  H01L27/04 ,  H01L29/78 ,  H02M1/32 ,  H02M2001/327 ,  H03K17/284 ,  H03K2017/0806

Abstract: A temperature protection device includes temperature detection devices detecting the temperatures of switching elements and a control device controlling the switching elements. The control device stops driving of a first switching element the temperature of which rises to an overheat detection temperature and resumes the driving of the first switching element when the temperature of the first switching element drops to a return temperature. The control device controls timing of resuming the driving of the first switching element so that an undriven time period of the first switching element is longer in a case where at least one of the switching elements other than the first switching element is in a high load state when the temperature of the first switching element reaches the overheat detection temperature than that in a case where all the switching elements other than the first switching element are in a low load state.

公开(公告)号：US20170033684A1

公开(公告)日：2017-02-02

申请号：US15219339

申请日：2016-07-26

Applicant: DENSO CORPORATION

Inventor： Ippei KAWAMOTO

IPC: H02M3/07 ,  H03K17/16 ,  H03K5/08

CPC classification number: H02M3/07 ,  H02M3/073 ,  H02M2003/075 ,  H03K5/08 ,  H03K17/165

Abstract: A switching element driving circuit includes a charge pump circuit and a drive voltage generating circuit. The charge pump circuit generates a boosted voltage. The drive voltage generating circuit generates a drive voltage for driving a switching element from the boosted voltage. The drive voltage generating circuit applies a current to a control terminal of the switching element through a resistor at least in an initial stage and an end stage of an output period during which a signal instructing the switching element to be turned on is outputted, and alleviates a rising and a falling of the drive voltage. A switching frequency of the charge pump circuit is set from 2 MHz to 30 MHz. As a result, generation of radio noise can be restricted in both of the drive voltage generating circuit and the charge pump circuit.

Abstract translation: 开关元件驱动电路包括电荷泵电路和驱动电压产生电路。 电荷泵电路产生升压电压。 驱动电压产生电路产生用于从升压电压驱动开关元件的驱动电压。 驱动电压产生电路至少在初始阶段和输出期间输出指示开关元件的信号的输出周期的电阻器通过电阻器向开关元件的控制端子施加电流，并且缓解 驱动电压的上升和下降。 电荷泵电路的开关频率设定为2MHz〜30MHz。 结果，可以在驱动电压产生电路和电荷泵电路两者中限制无线电噪声的产生。