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US 2010/0073067 A1Published application
Inductive Load Power Switching Circuits
AssigneeTransphorm Inc.
InventorJames Honea
Life of this patent
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Abstract
Power switching circuits including an inductive load and a switching device are described. The switches devices can be either low-side or high-side switches. Some of the switches are transistors that are able to block voltages or prevent substantial current from flowing through the transistor when voltage is applied across the transistor.
Claims38
A switch, comprising:
- a first switching device in series with an assembly comprising a load and a second switching device, the first switching device including a gate and a first channel, the second switching device including a second channel, wherein in a first mode of operation the second switching device is capable of blocking a voltage applied across the second switching device in a first direction, in a second mode of operation a substantial current flows through the second channel when a voltage is applied across the second switching device in a second direction and a gate of the second switching device is biased below a threshold voltage of the second switching device, and in a third mode of operation a substantial current flows through the second channel when a voltage is applied across the second switching device in the second direction and the gate of the second switching device is biased above the threshold voltage of the second switching device.
A boost-mode power-factor correction circuit, comprising:
- a first switching device comprising a first channel;
- an inductive load;
- a capacitor;
- and
- a second switching device comprising a second channel, wherein the first switching device is connected to a node between the inductive load and a floating gate drive circuit, the second switching device is configured to be connected to the floating gate drive circuit, and the second switching device is between the inductive load and the capacitor.
2 more elements
Dependencies are inferred from the claim text.