GATE DRIVING CIRCUIT
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Accused Products
Abstract
To obtain a gate driving circuit in which rising of a constant current of a constant current circuit is fast and power saving is achieved, the gate driving circuit includes: a constant current driving circuit (28) for supplying a constant current; a gate terminal of a power semiconductor element (1), which is connected to an output terminal of the constant current driving circuit; a comparator (22) for comparing a voltage at the gate terminal with a predetermined voltage value and outputting a signal indicating that the voltage is higher than the predetermined voltage value; and a driving control section (20) for increasing a current from the constant current driving circuit in response to a signal for turning on the power semiconductor element, and reducing the current from the constant current driving circuit in response to the signal from the comparator.
31 Citations
17 Claims
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1-7. -7. (canceled)
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8. A gate driving circuit for performing switching control on a power semiconductor element,
said gate driving circuit comprising: -
a constant current driving circuit for supplying a constant current; a gate terminal connected to a gate of said power semiconductor element, which is connected to an output terminal of said constant current driving circuit; an auxiliary current supply circuit which is connected to the output terminal of said constant current driving circuit in parallel with said gate terminal or connected to said gate terminal; a first switch which is provided in said constant current driving circuit or between said output terminal and said gate terminal; a second switch for turning on and off said auxiliary current supply circuit; and a driving control section for turning on and off said first switch and said second switch. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification