Control circuit for a depletion mode switch and method of operating the same
AssigneeColdWatt, Inc.
InventorAllen F. Rozman
Life of this patent
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Abstract
A control circuit for a power converter employing a depletion mode switch and a method of operating the same. In one embodiment, the control circuit includes a controller configured to control the depletion mode switch by providing a drive signal to a control terminal thereof as a function of a characteristic of the power converter. The control circuit also includes a protection circuit configured to induce an application of a drive signal having a non-zero value to the control terminal to substantially disable the depletion mode switch in response to a transient condition of the power converter.
Claims20
A control circuit for a power converter employing a switch enabled to conduct when substantially zero volts is applied to a control terminal thereof, comprising:
- a controller configured to control said switch by providing a drive signal to said control terminal thereof as a function of a characteristic of said power converter;
- and
- a protection circuit configured to induce an application of a drive signal having a negative value derived from a bias voltage to said control terminal to substantially disable said switch when an input voltage is applied to said power converter.
A method of operating a power converter employing a switch enabled to conduct when substantially zero volts is applied to a control terminal thereof, comprising:
- controlling said switch by providing a drive signal to said control terminal thereof as a function of a characteristic of said power converter;
- and
- inducing an application of a drive signal having a negative value derived from a bias voltage to said control terminal to substantially disable said switch when an input voltage is applied to said power converter.
Dependencies are inferred from the claim text.