Method and apparatus providing protection for power converter
First Claim
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1. A control circuit for a power converter, comprising:
- an input circuit generating a threshold signal;
a first comparator coupled to receive a signal representative of the current through a power switch, the first comparator generates a control signal when the signal is larger than the threshold signal;
a timer circuit coupled to generate a time-out signal in response to the control signal;
wherein the time-out signal is used to turn off the power switch.
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Abstract
The invention presents a surge output protection for a control circuit of power converter. It comprises an input circuit for generating a threshold signal. A first comparator is coupled to receive a signal representative the current through a power switch. The first comparator further generates a control signal in response to the signal and the threshold signal. A timer circuit is utilized to generate a time-out signal in response to the control signal. The time-out signal is coupled to turn off the power switch.
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5 Claims
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1. A control circuit for a power converter, comprising:
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an input circuit generating a threshold signal; a first comparator coupled to receive a signal representative of the current through a power switch, the first comparator generates a control signal when the signal is larger than the threshold signal; a timer circuit coupled to generate a time-out signal in response to the control signal; wherein the time-out signal is used to turn off the power switch. - View Dependent Claims (2, 3, 4, 5)
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Specification