SEMICONDUCTOR DEVICE
First Claim
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1. A semiconductor device comprising:
- a semiconductor circuit; and
an electric-power supply, whereinthe semiconductor circuit comprisesa main element including a voltage-drive-type switching element, and an antiparallel diode connected in anti-parallel with the switching element,a reverse voltage application circuit including a high-speed free wheeling diode having a reverse recovery time of which is shorter than the antiparallel diode, and a reverse recovery charge of which is smaller than the antiparallel diode, a capacitor, and an auxiliary element connected between the capacitor and the high-speed free wheeling diode, configured to be turned on at the time of reverse recovery of the antiparallel diode, and having a withstand voltage of which is lower than the main element, and configured to apply a reverse voltage lower than the withstand voltage of the main element to the antiparallel diode,a main element drive circuit configured to supply a control signal to the main element, andan auxiliary element drive circuit configured to supply a control signal to the auxiliary element, andthe electric-power supply is connected in parallel with the capacitor, is further connected to the main element drive circuit, and the auxiliary element drive circuit, is configured to supply electric-power to the capacitor, the main element drive circuit and the auxiliary element drive circuit, and has a voltage lower than the withstand voltage of the main element.
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Abstract
According to one embodiment, a semiconductor device includes a semiconductor circuit and an electric-power supply. The semiconductor circuit includes a main element including a switching element and an antiparallel diode, a reverse voltage application circuit including a high-speed free wheeling diode, a capacitor and an auxiliary element, a main element drive circuit, and an auxiliary element drive circuit. The electric-power supply is configured to supply electric-power to the capacitor, the main element drive circuit and the auxiliary element drive circuit, and has a voltage lower than the withstand voltage of the main element.
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Citations
7 Claims
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1. A semiconductor device comprising:
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a semiconductor circuit; and an electric-power supply, wherein the semiconductor circuit comprises a main element including a voltage-drive-type switching element, and an antiparallel diode connected in anti-parallel with the switching element, a reverse voltage application circuit including a high-speed free wheeling diode having a reverse recovery time of which is shorter than the antiparallel diode, and a reverse recovery charge of which is smaller than the antiparallel diode, a capacitor, and an auxiliary element connected between the capacitor and the high-speed free wheeling diode, configured to be turned on at the time of reverse recovery of the antiparallel diode, and having a withstand voltage of which is lower than the main element, and configured to apply a reverse voltage lower than the withstand voltage of the main element to the antiparallel diode, a main element drive circuit configured to supply a control signal to the main element, and an auxiliary element drive circuit configured to supply a control signal to the auxiliary element, and the electric-power supply is connected in parallel with the capacitor, is further connected to the main element drive circuit, and the auxiliary element drive circuit, is configured to supply electric-power to the capacitor, the main element drive circuit and the auxiliary element drive circuit, and has a voltage lower than the withstand voltage of the main element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification