Semiconductor device
First Claim
1. A semiconductor device comprising:
- at least two switching circuits connected in parallel, each of the at least two switching circuits comprising at least two switching elements connected in series and a clamping diode connected to a node between adjacent switching elements of the least two switching elements;
a base potential line, connecting auxiliary terminals of different switching circuits of the at least two switching circuits at a base potential to apply an equivalent control signal on the switching elements, that operates to deliver an equal level of potential in the parallel-connected switching circuits; and
a wiring line connecting the respective nodes of the different switching circuits, having a current carrying capacity approximately equal to a rated current of at least one of the switching elements connected to the wiring line, and having a lower resistance value than that of the base potential line.
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Accused Products
Abstract
A semiconductor device, according to one possible configuration, includes switching circuits, each switching circuit comprising IGBT chips connected in series and clamping diodes. The semiconductor device also includes a first and a second wiring line and auxiliary emitter lines. The first wiring line and a first auxiliary emitter line connect the emitter terminals of IGBT chips of the first and second switching circuits. The second wiring line and another auxiliary emitter line connect the emitter terminals of the third IGBT chips of the first and second switching circuits. The wiring lines have a large current carrying capacity and a lower resistance value than their respectively connected auxiliary emitter line.
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Citations
17 Claims
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1. A semiconductor device comprising:
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at least two switching circuits connected in parallel, each of the at least two switching circuits comprising at least two switching elements connected in series and a clamping diode connected to a node between adjacent switching elements of the least two switching elements; a base potential line, connecting auxiliary terminals of different switching circuits of the at least two switching circuits at a base potential to apply an equivalent control signal on the switching elements, that operates to deliver an equal level of potential in the parallel-connected switching circuits; and a wiring line connecting the respective nodes of the different switching circuits, having a current carrying capacity approximately equal to a rated current of at least one of the switching elements connected to the wiring line, and having a lower resistance value than that of the base potential line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor device comprising:
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at least two switching circuits connected in parallel, each of the at least two switching circuit comprising at least two IGBT chips connected in series and a clamping diode connected to a node between adjacent IGBT chips of the at least two IGBT chips; and an auxiliary emitter line that connects auxiliary emitter terminals of the IGBT chips of different switching circuits of the at least two switching circuits at a high potential side of the series-connected IGBT chips in the parallel-connected switching circuits, and that has a current carrying capacity approximately equal to a rated current of at least one of the IGBT chips connected to the auxiliary emitter line. - View Dependent Claims (9, 10, 11)
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12. A semiconductor device comprising:
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at least two switching circuits connected in parallel, each of the at least two switching circuit comprising at least two IGBT chips connected in series and a clamping diode connected to a node between adjacent IGBT chips of the at least two IGBT chips; a base potential line, connecting auxiliary emitter terminals of the IGBT chips of different switching circuits of the at least two switching circuits, that operates to deliver an equal level of potential in the parallel-connected switching circuits; and a wiring line connecting the respective nodes of the different switching circuits, having a current carrying capacity approximately equal to a rated current of the at least one of the IGBT chips connected to the wiring line, and having a lower resistance value than that of the base potential line. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification