公开(公告)号：US11252813B2

公开(公告)日：2022-02-15

申请号：US16533643

申请日：2019-08-06

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yoshihisa Minami ,  Takuya Ishii

IPC: H05K1/00 ,  H05K1/18 ,  H05K7/00 ,  H05K1/02 ,  H03H7/01

Abstract: An advantageous effect of a low-pass filter that reduces high-frequency noise can be obtained by including an input terminal that extends from a front surface to a rear surface of a multilayer circuit board including a double-sided circuit board; a first wiring conductor having an end connected to the input terminal on the rear surface of the multilayer circuit board; a first via that extends from an other end of the first wiring conductor to the front surface of the multilayer circuit board; a second wiring conductor having an end connected to the first via on the front surface of the multilayer circuit board; and a first input capacitor disposed on the second wiring conductor; by being conductive due to the input terminal and the first via being configured in series; and including the first input capacitor.

公开(公告)号：US20210258008A1

公开(公告)日：2021-08-19

申请号：US17308805

申请日：2021-05-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daijiro Arisawa ,  Takeshi Azuma ,  Daisuke Yamamoto ,  Yoshihisa Minami ,  Manabu Yanagihara

IPC: H03K17/687 ,  H02M1/08 ,  H02M1/34 ,  H03K17/74

Abstract: A switching circuit includes: a normally-off junction field-effect GaN transistor including source, drain, and gate terminals; a drive device of one output type electrically connected to the gate terminal; a first rectifier, between the source terminal and the gate terminal, including an anode on a source terminal side and a cathode on a gate terminal side; a capacitor between a cathode side of the first rectifier and the drive device; a first resistor between the capacitor and the drive device; a second resistor, one side of the second resistor being connected to the drive device, another side of the second resistor being connected between the cathode side of the first rectifier and the capacitor; and a second rectifier including an anode on a capacitor side and a cathode on a drive device side. No resistor is provided between the cathode side of the second rectifier and the drive device.

公开(公告)号：US11749578B2

公开(公告)日：2023-09-05

申请号：US17431657

申请日：2020-01-14

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Koji Takahashi ,  Kazuhiro Yahata ,  Yoshihisa Minami ,  Hiroki Akashi ,  Shinya Miyazaki

IPC: H01L23/367 ,  H01L23/00 ,  H01L25/065

CPC classification number: H01L23/3672 ,  H01L24/05 ,  H01L24/09 ,  H01L24/45 ,  H01L24/48 ,  H01L25/0655 ,  H01L2224/04042 ,  H01L2224/05144 ,  H01L2224/09515 ,  H01L2224/45144 ,  H01L2224/48155 ,  H01L2924/014 ,  H01L2924/13091 ,  H01L2924/30107

Abstract: The semiconductor module includes: a heat dissipation board including first to third wiring patterns; a first metal plate on the first wiring pattern, a second metal plate on the second wiring pattern, a first semiconductor chip and a first intermediate board which are on the first metal plate, a second semiconductor chip and a second intermediate board which are on the second metal plate. A first metal film on the first intermediate board is electrically connected to the first semiconductor chip and the second metal plate, and a second metal film on the second intermediate board is electrically connected to the second semiconductor chip and the third wiring pattern.

公开(公告)号：US12074516B2

公开(公告)日：2024-08-27

申请号：US17758404

申请日：2020-12-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroki Akashi ,  Takuya Ishii ,  Yoshihito Kawakami ,  Kazuhiro Yahata ,  Takeshi Azuma ,  Yoshihisa Minami

IPC: H02M3/156 ,  H02M1/08 ,  H03F3/217

CPC classification number: H02M3/156 ,  H02M1/08 ,  H03F3/217

Abstract: A switch circuit is configured of a first semiconductor element and a second semiconductor element connected in series, and receives a DC voltage of 100 V or more. The drive circuit causes the first semiconductor element or the second semiconductor element to perform a switching operation. The isolated power supply circuit converts a predetermined power supply voltage into an isolated first power supply voltage, and outputs the first power supply voltage to the drive circuit. The isolation signal converter converts a first signal of 6 MHz or more into an isolated first drive signal, and outputs the first drive signal to the drive circuit. The single substrate mounts the isolated power supply circuit and the isolation signal converter. Both the first semiconductor element and the second semiconductor element are wide bandgap semiconductor elements.

公开(公告)号：US11031935B2

公开(公告)日：2021-06-08

申请号：US17003900

申请日：2020-08-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daijiro Arisawa ,  Takeshi Azuma ,  Daisuke Yamamoto ,  Yoshihisa Minami ,  Manabu Yanagihara

IPC: H03K3/00 ,  H03K3/017 ,  H03K17/06 ,  H03K17/14 ,  H03K17/16 ,  H03K17/687 ,  H02M1/08 ,  H02M1/34 ,  H03K17/74

Abstract: A switching circuit includes; a switching element; a driver; a diode connected between a source terminal and a gate terminal of the switching element; a resistor connected between the driver and the gate terminal of the switching element; a series circuit connected in parallel with the resistor, and including a capacitor and a resistor; and a diode including an anode on a side of the gate terminal of the switching element and a cathode on a side of a second output terminal of the driver. The diode is connected in parallel with at least the capacitor out of the capacitor and the resistor connected in series.

公开(公告)号：US09871457B2

公开(公告)日：2018-01-16

申请号：US15421614

申请日：2017-02-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuya Sakurai ,  Takashi Saji ,  Yoshihisa Minami ,  Keita Kawabe

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A switching power supply device of the present disclosure includes a device connection state detection circuit that detects a connection state in a load device connection terminal, in a power supply system having the load device connection terminal. The device connection state detection circuit includes a transformer, a switching element, a pulse generator, and a waveform detection circuit. The waveform detection circuit detects a voltage or a current generated at a connecting point between a primary winding wire of the transformer and the switching element in response to operation of a pulse signal. The waveform detection circuit compares the voltage or the current with a predetermined reference value, and outputs an output signal in response to a comparison result to an OFF terminal.