Distributed control pole clamp circuit for gate driver
First Claim
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1. A switching circuit for controlling supply of electrical power from a power pole input to a power pole output, comprising:
- a plurality of transistors connected in parallel between the power pole input and the power pole output to control supply of electrical power from the power pole input to the power pole output, each transistor having a control pole, a positive power pole connected to the power pole input, and a negative power pole connected to the power pole output;
a gate drive circuit connected to the control poles of the transistors for supplying one or more gate commands to the transistors for causing turn-on and turn-off of the transistors; and
a plurality of switching devices each connected to the control pole of a respective one of the transistors for clamping a control pole voltage of the respective transistor, wherein the switching devices are configured to clamp the control pole voltage of the respective transistor when a feedback signal is less than a threshold signal and the switching devices are configured to forgo clamping when the feedback signal is greater than the threshold signal.
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Abstract
A switching circuit for controlling supply of electrical power from a power pole input to a power pole output.
16 Citations
20 Claims
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1. A switching circuit for controlling supply of electrical power from a power pole input to a power pole output, comprising:
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a plurality of transistors connected in parallel between the power pole input and the power pole output to control supply of electrical power from the power pole input to the power pole output, each transistor having a control pole, a positive power pole connected to the power pole input, and a negative power pole connected to the power pole output; a gate drive circuit connected to the control poles of the transistors for supplying one or more gate commands to the transistors for causing turn-on and turn-off of the transistors; and a plurality of switching devices each connected to the control pole of a respective one of the transistors for clamping a control pole voltage of the respective transistor, wherein the switching devices are configured to clamp the control pole voltage of the respective transistor when a feedback signal is less than a threshold signal and the switching devices are configured to forgo clamping when the feedback signal is greater than the threshold signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A switching circuit for controlling supply of electrical power from a power pole input to a power pole output, comprising:
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a plurality of transistors connected in parallel between the power pole input and the power pole output to control supply of electrical power from the power pole input to the power pole output, each transistor having a control pole, a positive power pole connected to the power pole input, and a negative power pole connected to the power pole output; a gate drive circuit connected to the control poles of the transistors for supplying one or more gate commands to the transistors for causing turn-on and turn-off of the transistors; a plurality of switching devices each connected to the control pole of a respective one of the transistors for clamping a control pole voltage of the respective transistor, wherein the switching devices are configured to clamp the control pole voltage of the respective transistor when a feedback signal is less than a threshold signal and the switching devices are configured to forgo clamping when the feedback signal is greater than the threshold signal; split gate resistors each connected to the control pole of a respective one of the transistors to damp a resonant path between the control poles of the transistors, wherein the split gate resistors are arranged in parallel with each other; and one or more shared gate resistors connected in series with the split gate resistors.
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20. A switching circuit for controlling supply of electrical power from a power pole input to a power pole output, comprising:
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a first transistor and a second transistor connected in parallel between the power pole input and the power pole output to control supply of electrical power from the power pole input to the power pole output; a gate drive circuit connected to the first transistor and the second transistor for causing turn-on and turn-off of the first transistor and the second transistor; a first switching device connected to the first transistor and a second switching device connected to the second transistor to apply clamping to the first transistor and the second transistor when a feedback signal is greater than a threshold; and a feedback circuit that sets the feedback signal to the highest of a first control voltage of the first transistor or a second control voltage of the second transistor from the control poles of the transistors.
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Specification