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公开(公告)号：EP3832864A1
公开(公告)日：2021-06-09
申请号：EP19877039.8
申请日：2019-03-13
申请人： OMRON Corporation
IPC分类号： H02M1/08 , H03K17/16 , H03K17/687
摘要： A switching element 1 has a gate terminal connected to an output end Vout of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to the driving circuit 12 via a capacitor 14 and a Zener diode 15 connected in parallel. The Zener diode 15 has an anode terminal connected to the source terminal of the switching element 1 and a cathode terminal connected to the driving circuit 12.
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公开(公告)号：EP3832863A1
公开(公告)日：2021-06-09
申请号：EP19875624.9
申请日：2019-03-13
申请人： OMRON Corporation
IPC分类号： H02M1/08 , H03K17/16 , H03K17/687
摘要： A switching element 1 has a gate terminal connected to a Vout end 123 of a driving circuit 12 via a capacitor 11 and a resistor 13 connected in parallel. The switching element 1 has a source terminal connected to a Vee end 124 of the driving circuit 12 via a capacitor 14 and a resistor 14 connected in parallel.
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公开(公告)号：EP3829062A1
公开(公告)日：2021-06-02
申请号：EP19840146.5
申请日：2019-03-11
申请人： OMRON Corporation
发明人： OKADA, Wataru , IWAI, Satoshi , NOSAKA, Noriyuki , NISHIKAWA, Takeo , KOBAYASHI, Kenji , SHIRAISHI, Keiji
摘要： A driver circuit controls a first switch element. A first resistor is connected between the driver circuit and the first switch element. A second switch element is connected to the first switch element. An overcurrent detector circuit controls the second switch element based on an overcurrent current flowing through the first switch element. A second resistor is connected between the overcurrent detector circuit and the second switch element. The first and second resistors is set such that a turn-off time of the first switch element when the second switch element is turned on by the overcurrent detector circuit is longer than a turn-off time of the first switch element when the first switch element is turned off by the driver circuit.
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公开(公告)号：EP4366147A1
公开(公告)日：2024-05-08
申请号：EP22855714.6
申请日：2022-03-23
申请人： OMRON Corporation
摘要： A gate drive circuit connected to a gate terminal and a source terminal of a first switching element and turns on and off the first switching element, the gate drive circuit includes: a controller that has a first terminal connected to the gate terminal and a second terminal connected to the source terminal, has a first switch provided between the first terminal and a voltage source, and a second switch provided between the first terminal and the second terminal; a first resistor and a first capacitor, each having one end connected to the gate terminal and the other end connected to the first terminal; a second capacitor that has one end connected to the source terminal and the other end connected to the second terminal; and a first Zener diode that has a cathode terminal connected to the source terminal and an anode terminal connected to the second terminal.
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公开(公告)号：EP3826162A1
公开(公告)日：2021-05-26
申请号：EP19838148.5
申请日：2019-03-11
申请人： OMRON Corporation
发明人： NOSAKA, Noriyuki , NISHIKAWA, Takeo , OKADA, Wataru , IWAI, Satoshi , ISHII, Takanori , ETO, Gun
IPC分类号： H02M3/155
摘要： A power converter apparatus is provided to include at least one switching circuit, and a filter circuit. The at least one switching circuit generates an AC voltage by switching a DC voltage at a predetermined switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage, and outputs the DC voltage to a load. The filter circuit includes first and second bypass capacitors, and at least one inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit. The second frequency component is lower than the first frequency component of the AC voltage from the switching circuit. The at least one inductor is inserted between the first and second bypass capacitors. The inductance of the inductor is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
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公开(公告)号：EP4210225A1
公开(公告)日：2023-07-12
申请号：EP21864098.5
申请日：2021-08-17
申请人： OMRON Corporation
发明人： IWAI, Satoshi , SUEKI, Mamoru
IPC分类号： H03K17/08 , H03K17/082 , H02M1/00 , H02M1/08
摘要： The overcurrent protection circuit includes: a first transistor having an emitter connected to a control voltage; and a second transistor having a base connected to a collector of the first transistor, a collector connected to a base of the first transistor and pulled up to a voltage, and a grounded emitter. When the control voltage exceeds a first threshold voltage, the first and second transistors are turned on, the control voltage decreases as a result of decrease in the pull-up voltage, and a protection operation to turn a switching element off is started, and the overcurrent protection circuit includes a first diode connected between the control voltage and the emitter of the first transistor, and an element circuit connected between the emitter and the base thereof. The element circuit includes any of a second diode, a first resistor, and a parallel circuit including the second diode and the first resistor.
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公开(公告)号：EP3832866A1
公开(公告)日：2021-06-09
申请号：EP20749654.8
申请日：2020-01-30
申请人： OMRON Corporation
摘要： An overcurrent protection circuit is provided for a switching element turned on/off based on a control voltage. The overcurrent protection circuit includes a first transistor and a second transistor. The first transistor is a PNP bipolar transistor and has an emitter connected to the control voltage. The second transistor is an NPN bipolar transistor and has a base connected to a collector of the first transistor, a collector connected to a base of the first transistor and pulled up to a predetermined pull-up voltage, and a grounded emitter. When the control voltage exceeds a predetermined first threshold voltage, the first and second transistors are turned on, the control voltage is dropped by drop of the pull-up voltage, and thus the overcurrent protection circuit starts a protection operation of turning off the switching element.
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公开(公告)号：EP3826161A1
公开(公告)日：2021-05-26
申请号：EP19837418.3
申请日：2019-03-11
申请人： OMRON Corporation
发明人： NOSAKA, Noriyuki , NISHIKAWA, Takeo , OKADA, Wataru , IWAI, Satoshi , ISHII, Takanori , ETO, Gun
IPC分类号： H02M3/155
摘要： A power converter apparatus is provided to include at least one switching circuit, and a filter circuit. The at least one switching circuit generates an AC voltage by switching a DC voltage at a predetermined switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage, and outputs the DC voltage to a load. The filter circuit includes first and second bypass capacitors, and at least one inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit. The second frequency component is lower than the first frequency component of the AC voltage from the switching circuit. The at least one inductor is inserted between the first and second bypass capacitors. The inductance of the inductor is set so that a resonance frequency of the filter circuit is lower than multiple times the switching frequency by insertion of the inductor.
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公开(公告)号：EP4380024A1
公开(公告)日：2024-06-05
申请号：EP22866967.7
申请日：2022-03-29
申请人： OMRON Corporation
发明人： NOSAKA, Noriyuki , SUEKI, Mamoru , IWAI, Satoshi , MISHIMA, Junya , TAUCHI, Hironori , OKADA, Wataru
CPC分类号： Y02B70/10 , H03K17/0812 , H03K17/16 , H02M1/08
摘要： Provided is a technique capable of suppressing oscillation noise of a semiconductor device and suppressing mirror noise. Included are: a switching device configured to conduct or open a state between a drain terminal and a source terminal based on a voltage applied between a gate terminal and the source terminal; a drive circuit including a first switch element and a second switch element, the drive circuit being configured to open and close the first switch element and the second switch element in accordance with a predetermined control signal, and output a drive voltage for driving the switching device to the gate terminal via an output end; a clamp circuit including a third switch element configured to conduct between a reference potential of the drive circuit and a connection point of a path connecting the output end of the drive circuit and the gate terminal based on a comparison result between a threshold potential generated based on the reference potential of the drive circuit and a potential at the connection point; and a ferrite inductor provided immediately near the output end of the drive circuit, and having one end connected to the output end and the other end connected to the connection point.
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公开(公告)号：EP4199356A1
公开(公告)日：2023-06-21
申请号：EP21875108.9
申请日：2021-09-07
申请人： OMRON Corporation
发明人： NOSAKA, Noriyuki , TAUCHI, Hironori , HASHIMOTO, Takuro , OKADA, Wataru , SUEKI, Mamoru , IWAI, Satoshi
IPC分类号： H03K17/687 , H02M1/08
摘要： In a driving circuit for a switching element, a loss due to a negative bias voltage is reduced, breakdown of the switching element due to a surge voltage is prevented, and erroneous ignition of the switching element due to switching noise is prevented.
A driving circuit that drives a switching element, the driving circuit includes: a controller that includes a first terminal connected to a gate terminal of the switching element and a second terminal connected to a source terminal of the switching element, and outputs a control signal from the first terminal to the gate terminal; a first capacitor and a first resistor connected in parallel; and a second capacitor and a second resistor connected in parallel, in which the first capacitor and the first resistor are connected in series to a first connecting wire for connecting the gate terminal and the first terminal on the gate terminal side of the first connecting wire, and in which the second capacitor and the second resistor are connected in series to the first connecting wire on the first terminal side of the first connecting wire.
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