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US 12,627,216 B2Granted
Driving circuit for switching elements with controllable driving current
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorShusuke Kawai
Life of this patent
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Abstract
In one embodiment, electronic circuitry includes a driving circuit that is configured to: supply a driving current to a control terminal of a first switching element; and increase the driving current in accordance with a first time at which a current flowing through a second switching element connected to a first terminal or a second terminal of the first switching element becomes 0.
Claims18
An electronic circuitry comprising:
- a driving circuit configured to:
- supply a driving current to a control terminal of a first switching element;
- and
- increase the driving current in accordance with a first time, the first time being when a current flowing through a second switching element becomes 0, the second switching element being connected to a first terminal or a second terminal of the first switching element, wherein
- the driving circuit increases the driving current of the first switching element in a first period according to the first time, the first period being before or after the first time, and
- the first period is determined based on a parasitic capacitance of the first switching element, a parasitic capacitance of the second switching element and a parasitic inductance of wiring that connects the first switching element and the second switching element.
3 more elements
An electronic circuitry, comprising:
- a driving circuit configured to:
- supply a driving current to a control terminal of a first switching element;
- and
- reduce the driving current of the first switching element in a second period between a first time and a second time, the first time being when a current flowing through a second switching element becomes 0, the second switching element being connected to a first terminal or a second terminal of the first switching element, the second time being when a current flowing through the first switching element starts increasing, wherein
- the driving circuit reduces the driving current of the first switching element in a step-like manner in the second period, and
- a target value of the driving current is a value that causes a voltage across a parasitic inductance of wiring at the first time to be reduced by a predetermined percentage in comparison with a case where the driving current is not reduced, the wiring connecting the first switching element and the second switching element.
3 more elements
Dependencies are inferred from the claim text.