Control circuit and switch device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsRyosuke Maeda, Yusuke Kinoshita, Hidetoshi Ishida
Life of this patent
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Abstract
A control circuit controls a switching element including a gate and a source corresponding to the gate. The control circuit includes an inductor, a circuit element, and a resistor. The inductor is connected between the gate and the source of the switching element. The circuit element is connected in series to the inductor between the gate and the source. The circuit element allows an electric current to flow therethrough in response to generation of electromotive force in the inductor. The resistor is connected in parallel to the inductor and the circuit element between the gate and the source.
Claims16
A control circuit configured to control a switching element, the switching element including a gate and a source corresponding to the gate, the control circuit comprising:
- an inductor connected between the gate and the source of the switching element;
- a circuit element connected in series to the inductor between the gate and the source and configured to allow an electric current to flow therethrough in response to generation of electromotive force in the inductor;
- and
- a resistor connected in parallel to the inductor and the circuit element between the gate and the source,
- wherein
- the circuit element includes a resistor.
A control circuit configured to control a switching element, the switching element including a gate and a source corresponding to the gate, the control circuit comprising:
- an inductor connected between the gate and the source of the switching element;
- a circuit element connected in series to the inductor between the gate and the source and configured to allow an electric current to flow therethrough in response to generation of electromotive force in the inductor;
- a resistor connected in parallel to the inductor and the circuit element between the gate and the source;
- and
- a protective diode, the protective diode including an anode and a cathode, having the anode connected to a point of connection between the circuit element and the resistor, and having the cathode connected to the gate of the switching element.
A control circuit configured to control a switching element, the switching element including a gate and a source corresponding to the gate, the control circuit comprising:
- an inductor connected between the gate and the source of the switching element;
- a circuit element connected in series to the inductor between the gate and the source and configured to allow an electric current to flow therethrough in response to generation of electromotive force in the inductor;
- a resistor connected in parallel to the inductor and the circuit element between the gate and the source;
- a first terminal connected to the switching element at a point, located opposite from the source, of the switching element;
- a second terminal connected to the inductor at a point, located opposite from the switching element, of the inductor;
- a second inductor connected between a first node and the circuit element, the first node being located between a first inductor serving as the inductor and the second terminal;
- a voltage clamping element connected in parallel to the switching element, the first inductor, and the second inductor;
- and
- a third inductor connected between a second node and the voltage clamping element, the second node being located between the second inductor and the circuit element, wherein
- no electric current flows through the third inductor while the switching element is in ON state.
A switch device comprising:
- a control circuit configured to control a switching element, the switching element including a gate and a source corresponding to the gate;
- and
- the switching element,
- the control circuit comprising:
- an inductor connected between the gate and the source of the switching element;
- a circuit element connected in series to the inductor between the gate and the source and configured to allow an electric current to flow therethrough in response to generation of electromotive force in the inductor;
- and
- a resistor connected in parallel to the inductor and the circuit element between the gate and the source;
- the switching element is a dual-gate bidirectional switch including two gates and two sources, each of the two gates being the gate, each of the two sources being the source,
- the switch device includes two control circuits, each of the two control circuits being the control circuit, and
- one control circuit out of the two control circuits is connected to a gate, associated with the one control circuit, out of the two gates of the bidirectional switch, and
- the other control circuit out of the two control circuits is connected to a gate, associated with the other control circuit, out of the two gates of the bidirectional switch.
Dependencies are inferred from the claim text.