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公开(公告)号：US20180212509A1
公开(公告)日：2018-07-26
申请号：US15925104
申请日：2018-03-19
Inventor： Takahiro UEHARA , Takuya ISHII , Hiroyuki HANDA , Atsushi KITAGAWA , Takeshi TANAKA
CPC classification number: H03K17/64 , H02M2001/0009 , H03K17/122 , H03K17/127
Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.
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公开(公告)号：US20190326829A1
公开(公告)日：2019-10-24
申请号：US16455623
申请日：2019-06-27
Inventor： Takao HASHIMOTO , Takuya ISHII
Abstract: An alternating current-direct current (AC-DC) converter includes: an input AC power supply that outputs an input AC voltage; a step-up converter that converts the input AC voltage into an output DC voltage to be outputted from an output capacitor; and an inrush current suppressing circuit. The inrush current suppressing circuit includes: an inrush current suppressing resistor provided on a path through which a current from the input AC power supply flows to charge the output capacitor and returns to the input AC power supply; a resistance short-circuiting switch that short-circuits the inrush current suppressing resistor; and a control circuit that generates a signal for turning off the resistance short-circuiting switch when an absolute value of the input AC voltage is higher than the output DC voltage.
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Patent Agency Ranking
公开(公告)号：US20180248540A1
公开(公告)日：2018-08-30
申请号：US15965007
申请日：2018-04-27
Inventor： Takuya ISHII , Daijiro ARISAWA , Masanori ITO , Takao HASHIMOTO , Takeshi AZUMA , Miwa ISHITSUBO , Kazuhiro MURATA
CPC classification number: H03K3/013 , H02M1/08 , H02M2001/348 , H03K17/161 , H03K17/163 , H05K1/0243 , H05K1/181 , H05K2201/10166 , H05K2201/10545
Abstract: A switching circuit includes main switching a device and a drive circuit. The main switching device has a gate terminal, a drain terminal, and a first source terminal through which a main current flows, and a second source terminal for gate drive connected to drive circuit. The drive circuit has a bias capacitor having a negative electrode terminal connected to the second source terminal, a first series circuit formed between a positive electrode terminal and the gate terminal by connecting a high-side switch, a resistor, and a capacitor in series, and a second series circuit formed between the gate terminal and the second source terminal by connecting the capacitor, a resistor and a low-side switch in series. The drive circuit adjusts each of gate charge and discharge currents, and further damps the oscillation of the waveform of gate current/voltage.
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公开(公告)号：US20190326810A1
公开(公告)日：2019-10-24
申请号：US16455615
申请日：2019-06-27
Inventor： Takao HASHIMOTO , Takuya ISHII
Abstract: A power-factor correcting converter includes: a series circuit including a first higher-potential switch and a first lower-potential switch connected in series to each other; and another series circuit including a second higher-potential switch and a second lower-potential switch connected in series to each other. In a positive phase period of the input AC voltage, a control circuit turns off the second higher-potential switch, turns on the second lower-potential switch, and alternately turns on and off the first lower-potential switch as a master switch and the first higher-potential switch as a slave switch. In a negative phase period of the input AC voltage, the control circuit reverses the on/off operation and the master/slave relationship, and turns on and off only the master switch and turns off the slave switch when the absolute value of the input AC voltage is smaller than or equal to a predetermined value.
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公开(公告)号：US20180083610A1
公开(公告)日：2018-03-22
申请号：US15801197
申请日：2017-11-01
Inventor： Takuya ISHII , Yoshihito KAWAKAMI , Takahiro UEHARA , Ginga KATASE
IPC: H03K17/041
CPC classification number: H03K17/04106 , H02M1/08 , H02M3/073 , H02M3/158 , H03K17/04123 , H03K17/163
Abstract: A driver circuit which is supplied with a positive power supply voltage, a negative power supply voltage, and an input signal, and drives a switching element including a control terminal according to the input signal includes: a first output terminal connected to the control terminal via a first impedance circuit, and outputs the positive power supply voltage or the negative power supply voltage according to the input signal, to charge the control terminal and put the switching element into an ON state; a negative power supply terminal supplied with the negative power supply voltage; a negative voltage switch having a first end connected to the negative power supply terminal; a third output terminal connected to a second end of the negative voltage switch and to the control terminal via a second impedance circuit; and a first discharge switch disposed between the negative power supply terminal and the first output terminal.
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公开(公告)号：US20190149148A1
公开(公告)日：2019-05-16
申请号：US16226081
申请日：2018-12-19
Inventor： Takahiro UEHARA , Takuya ISHII , Hiroyuki HANDA , Atsushi KITAGAWA , Takeshi TANAKA
CPC classification number: H03K17/64 , H02M2001/0009 , H03K17/122 , H03K17/127
Abstract: A switching circuit includes: a drive power supply; a first transistor and a second transistor; a drive signal source; and a drive circuit. Each of the first transistor and the second transistor includes: a drain electrode and a source electrode in which a main current flows when a corresponding one of the first transistor and the second transistor is ON; a first source terminal for passing the main current; and a second source terminal. Here, the first source terminal is connected to the source electrode at an impedance lower than an impedance of the second source terminal.
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公开(公告)号：US20160164417A1
公开(公告)日：2016-06-09
申请号：US15013426
申请日：2016-02-02
Inventor： Takuya ISHII , Atsushi KITAGAWA , Tadata HATANAKA
IPC: H02M3/158
CPC classification number: H02M3/158 , H01L24/48 , H01L24/49 , H01L25/00 , H01L25/04 , H01L25/18 , H01L2224/48091 , H01L2224/48137 , H01L2224/48227 , H01L2224/48247 , H01L2224/49113 , H01L2224/49431 , H01L2924/00014 , H01L2924/13091 , H01L2924/19041 , H01L2924/19042 , H01L2924/19104 , H01L2924/19105 , H02M3/155 , H02M7/003 , H01L2924/00 , H01L2224/45099 , H01L2224/45015 , H01L2924/207
Abstract: A DC-DC converter module includes a module substrate on which switching transistors and a controller IC chip are mounted, stud terminals mounted on a surface of the module substrate, and an inductor attached to the stud terminals such that the inductor faces the module substrate. In a plan view, the switching transistors are arranged within an area where the inductor overlaps the module substrate, whereas at least a portion of the controller IC chip is arranged outside the area.
Abstract translation: DC-DC转换器模块包括其上安装有开关晶体管和控制器IC芯片的模块基板，安装在模块基板的表面上的螺柱端子和附接到螺柱端子的电感器，使得电感器面向模块基板。 在平面图中，开关晶体管布置在电感器与模块衬底重叠的区域内，而控制器IC芯片的至少一部分布置在区域外。
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