System and method providing over current and over power protection for power converter
First Claim
1. A system for protecting a power converter, the system comprising:
- a threshold generator configured to generate a threshold signal;
a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal, the first signal being associated with an input current for a power converter;
a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal; and
a switch configured to receive the modulation signal and adjust the input current for the power converter;
wherein;
the threshold signal is associated with a threshold magnitude as a function of time;
the threshold magnitude increases with time at a first slope during a first substantial period of time;
the threshold magnitude increases with time at a second slope during a second substantial period of time; and
the first slope and the second slope are different.
1 Assignment
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Accused Products
Abstract
System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.
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Citations
32 Claims
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1. A system for protecting a power converter, the system comprising:
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a threshold generator configured to generate a threshold signal; a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal, the first signal being associated with an input current for a power converter; a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal; and a switch configured to receive the modulation signal and adjust the input current for the power converter; wherein; the threshold signal is associated with a threshold magnitude as a function of time; the threshold magnitude increases with time at a first slope during a first substantial period of time; the threshold magnitude increases with time at a second slope during a second substantial period of time; and the first slope and the second slope are different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for protecting a power converter, the system comprising:
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a threshold generator configured to generate a first threshold signal; a first comparator configured to receive the first threshold signal and a first input signal and to generate a first comparison signal, the first input signal being associated with an input current for a power converter, the first threshold signal being associated with a first threshold magnitude as a function of time; a second comparator configured to receive a second threshold signal and the first input signal and to generate a second comparison signal, the second threshold signal being associated with a second threshold magnitude; a logic component configured to receive the first comparison signal and the second comparison signal and generate an output signal; a pulse-width-modulation generator configured to receive the output signal and to generate a modulation signal in response to the output signal; and a switch configured to receive the modulation signal and adjust the input current for the power converter; wherein; the first threshold magnitude increases with time at a first slope during a first substantial period of time; the first threshold magnitude increases with time at a second slope during at least a second substantial period of time; and the first slope and the second slope are different. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A system for protecting a power converter, the system comprising:
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a current generator configured to generate a first current flowing into the current generator; a comparator configured to receive a threshold signal and a first signal and to generate a comparison signal, the first signal being a sum of a second signal and a third signal, the second signal being associated with the first current, the third signal being associated with an input current for a power converter; a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal; and a switch configured to receive the modulation signal and adjust the input current for the power converter; wherein; the first current is associated with a current magnitude as a function of time; the current magnitude increases with time at a first slope during a first substantial period of time; the current magnitude increases with time at a second slope during a second substantial period of time; and the first slope and the second slope are different. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for protecting a power converter, the method comprising:
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generating a threshold signal; receiving the threshold signal and a first signal, the first signal being associated with an input current for a power converter; processing information associated with the threshold signal and the first signal; generating a comparison signal based on at least information associated with the threshold signal and the first signal; processing information associated with the comparison signal; generating a modulation signal based on at least information associate with the comparison signal; and adjusting the input current for the power converter in response to the modulation signal; wherein; the threshold signal is associated with a threshold magnitude as a function of time; the threshold magnitude increases with time at a first slope during a first substantial period of time; the threshold magnitude increases with time at a second slope during a second substantial period of time; and the first slope and the second slope are different.
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31. A method for protecting a power converter, the method comprising:
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generating a first threshold signal, the first threshold signal being associated with a first threshold magnitude as a function of time; receiving the first threshold signal and a first input signal, the first input signal being associated with an input current for a power converter; processing information associated with the first threshold signal and the first input signal; generating a first comparison signal based on at least information associated with the first threshold signal and the first input signal; receiving a second threshold signal and the first input signal, the second threshold signal being associated with a second threshold magnitude; processing information associated with the second threshold signal and the first input signal; generating a second comparison signal based on at least information associated with the second threshold signal and the first input signal; receiving the first comparison signal and the second comparison signal; generating an output signal based on at least information associated with the first comparison signal and the second comparison signal; processing information associated with the output signal; generating a modulation signal based on at least information associated with the output signal; and adjust the input current for the power converter in response to the modulation signal; wherein; the first threshold magnitude increases with time at a first slope during a first substantial period of time; the first threshold magnitude increases with time at a second slope during at least a second substantial period of time; and the first slope and the second slope are different.
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32. A method for protecting a power converter, the method comprising:
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generating a first current flowing into a current generator; receiving a threshold signal and a first signal, the first signal being a sum of a second signal and a third signal, the second signal being associated with the first current, the third signal being associated with an input current for a power converter; processing information associated with the threshold signal and the first signal; generating a comparison signal based on at least information associated with the threshold signal and the first signal; processing information associated with the comparison signal; generating a modulation signal based on at least information associated with the comparison signal; and adjusting the input current for the power converter in response to the modulation signal; wherein; the first current is associated with a current magnitude as a function of time; the current magnitude increases with time at a first slope during a first substantial period of time; the current magnitude increases with time at a second slope during a second substantial period of time; and the first slope and the second slope are different.
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Specification