Fault condition protection
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Accused Products
Abstract
A circuit protects a power conversion system with a feedback control loop from a fault condition. The circuit has an oscillator having an input for generating a signal with a frequency and a timer connected to the oscillator input and to the feedback control loop. The timer disables the oscillator after a period following the opening of the feedback control loop to protect the power conversion system.
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Citations
55 Claims
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1-41. -41. (canceled)
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42. A circuit, comprising:
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a transistor coupled to be switched in response to a switching signal to control power delivered to an output of a power supply;
a timing circuit coupled to the transistor and coupled to receive a feedback signal and the switching signal, the timing circuit coupled to disable the transistor from receiving the switching signal in response to the feedback signal to prevent power delivery to the output of the power supply after detection of a fault condition, wherein the feedback signal is representative of the output of the power supply and cycles between first and second states when the power supply operates normally and does not cycling between the first and second states when the power supply is in the fault condition, and wherein the switching signal cycles separately from the cycling of the feedback signal. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification