Back to results
US 7,099,128 B2Granted
Fault condition protection
AssigneePower Integrations, Inc.
InventorsBalu Balakrishnan, Alex Djenguerian, Leif Lund
Life of this patent
Estimating the term…
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.
Claims14
A circuit, comprising:
- switching means for controlling power delivered to an output of a power supply in response to a switching signal;
- feedback input means for receiving a feedback signal representative of the output of the power supply, the feedback signal cycling periodically between a first state and a second state when the power supply operates normally and not cycling between the first and second states when the power supply is in a fault condition, the switching signal cycling separately from the cycling of the feedback signal;
- and
- timing means coupled to the feedback input means to reduce power delivery to the output of the power supply after detection of the fault condition to protect the power supply from fault conditions.
1 more element
Dependencies are inferred from the claim text.