Bidirectional switch circuit configured to conduct current in reverse direction without applying an on-drive signal and power converter including the same
First Claim
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1. A bidirectional switch circuit comprising:
- two switching elements connected to conduct a current in both directions, whereinthe two switching elements are connected in series to each other at drains,of the two switching elements, the switching element to which a reverse voltage is applied, a voltage of a source of one of the switching elements being higher than a voltage of a drain of the one of the switching elements, is configured to conduct a current from the source to the drain even when an on-drive signal is not being input to a gate terminal of the one of the switching elements,the bidirectional switch circuit further comprisesa gate drive circuit provided for each of the two switching elements, and configured to control, if a gate-to-source potential of one of the switching elements is controlled to be a first potential such that the one of the switching elements is turned on, a gate-to-source potential of the other of the switching elements such that the gate-to-source potential of the other of the switching elements is different from the first potential,the gate drive circuit comprisesa resistance material connected between the source and the gate terminal of the switching element and in parallel to the switching element,the resistance material has a resistance value which is smaller than that of the two switching elements, andthe two switching elements do not include a parasitic diode and an external diode each of which is located between the source and the drain and is capable of conducting a current from the source to the drain.
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Abstract
A bidirectional switch circuit includes two switching elements connected to conduct a current in both directions. The two switching elements are connected in series to each other. Of the two switching elements, the switching element to which a reverse voltage is applied, a voltage of a source of one of the switching elements being higher than a voltage of a drain of the one, is configured to conduct a current from the source to the drain even when an on-drive signal is not being input to a gate terminal of the one.
17 Citations
13 Claims
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1. A bidirectional switch circuit comprising:
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two switching elements connected to conduct a current in both directions, wherein the two switching elements are connected in series to each other at drains, of the two switching elements, the switching element to which a reverse voltage is applied, a voltage of a source of one of the switching elements being higher than a voltage of a drain of the one of the switching elements, is configured to conduct a current from the source to the drain even when an on-drive signal is not being input to a gate terminal of the one of the switching elements, the bidirectional switch circuit further comprises a gate drive circuit provided for each of the two switching elements, and configured to control, if a gate-to-source potential of one of the switching elements is controlled to be a first potential such that the one of the switching elements is turned on, a gate-to-source potential of the other of the switching elements such that the gate-to-source potential of the other of the switching elements is different from the first potential, the gate drive circuit comprises a resistance material connected between the source and the gate terminal of the switching element and in parallel to the switching element, the resistance material has a resistance value which is smaller than that of the two switching elements, and the two switching elements do not include a parasitic diode and an external diode each of which is located between the source and the drain and is capable of conducting a current from the source to the drain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification