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 voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first voltage magnitude;
a processing component including one or more comparators, the processing component configured to receive the first voltage signal and an input signal and to generate an output signal, the input signal being associated with an input current for the power converter; and
a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least information associated with the output signal, and output the modulation signal to a switch to adjust the input current for the power converter;
wherein;
the processing component is further configured to generate the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude;
the first logic state and the second logic state are different;
the effective threshold magnitude remains constant during a first substantial period of time;
the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero;
the effective threshold magnitude remains constant during a third substantial period of time;
the processing component is further configured to receive a second voltage signal, the second voltage signal being associated with a second voltage magnitude; and
the effective threshold magnitude is equal to the second voltage magnitude during the third substantial period of time.
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.
118 Citations
24 Claims
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1. A system for protecting a power converter, the system comprising:
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a voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first voltage magnitude; a processing component including one or more comparators, the processing component configured to receive the first voltage signal and an input signal and to generate an output signal, the input signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least information associated with the output signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the processing component is further configured to generate the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude; the first logic state and the second logic state are different; the effective threshold magnitude remains constant during a first substantial period of time; the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the effective threshold magnitude remains constant during a third substantial period of time; the processing component is further configured to receive a second voltage signal, the second voltage signal being associated with a second voltage magnitude; and the effective threshold magnitude is equal to the second voltage magnitude during the third substantial period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for protecting a power converter, the system comprising:
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a voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first voltage magnitude; a processing component including one or more comparators, the processing component configured to receive the first voltage signal and an input signal and to generate an output signal, the input signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least information associated with the output signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the processing component is further configured to generate the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude; the first logic state and the second logic state are different; the effective threshold magnitude remains constant during a first substantial period of time; the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the effective threshold magnitude remains constant during a third substantial period of time; the processing component includes a resistor configured to receive a first current and generate a second voltage based on at least information associated with the first current; and the effective threshold magnitude is equal in magnitude to a sum of a predetermined threshold magnitude and the second voltage.
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10. A system for protecting a power converter, the system comprising:
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a voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first voltage magnitude; a processing component including one or more comparators, the processing component configured to receive the first voltage signal and an input signal and to generate an output signal, the input signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least information associated with the output signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the processing component is further configured to generate the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude; the first logic state and the second logic state are different; the effective threshold magnitude remains constant during a first substantial period of time; the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the effective threshold magnitude remains constant during a third substantial period of time; and the pulse-width-modulation generator is further configured to receive the input signal, generate the modulation signal based on at least information associated with the input signal and the output signal, and output the modulation signal to the switch to adjust the input current for the power converter.
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11. A system for protecting a power converter, the system comprising:
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a voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first voltage magnitude; a processing component including one or more comparators, the processing component configured to receive the first voltage signal and an input signal and to generate an output signal, the input signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least information associated with the output signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the processing component is further configured to generate the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude; the first logic state and the second logic state are different; the effective threshold magnitude remains constant during a first substantial period of time; the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the effective threshold magnitude remains constant during a third substantial period of time; and the pulse-width-modulation generator includes; a pulse-width-modulation comparator configured to receive the input signal and generate a comparison signal based on at least information associated with the input signal; a logic controller configured to receive the comparison signal and the output signal and generate a control signal based on at least information associated with the comparison signal and the output signal; and a drive component configured to receive the control signal and generate the modulation signal based on at least information associated with the control signal.
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12. A system for protecting a power converter, the system comprising:
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a threshold generator configured to generate a threshold signal, the threshold signal being associated with a threshold magnitude; a first comparator configured to receive the threshold signal and a sensing signal and to generate a first comparison signal, the sensing signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the first comparison signal, generate a modulation signal based on at least information associated with the first comparison signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the threshold magnitude remains constant during a first substantial period of time; the threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the threshold magnitude remains constant during a third substantial period of time; and the pulse-width-modulation generator is further configured to receive the sensing signal, generate the modulation signal based on at least information associated with the sensing signal and the first comparison signal, and output the modulation signal to the switch to adjust the input current for the power converter. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A system for protecting a power converter, the system comprising:
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a threshold generator configured to generate a threshold signal, the threshold signal being associated with a threshold magnitude; a first comparator configured to receive the threshold signal and a sensing signal and to generate a first comparison signal, the sensing signal being associated with an input current for the power converter; and a pulse-width-modulation generator configured to receive the first comparison signal, generate a modulation signal based on at least information associated with the first comparison signal, and output the modulation signal to a switch to adjust the input current for the power converter; wherein; the threshold magnitude remains constant during a first substantial period of time; the threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the threshold magnitude remains constant during a third substantial period of time; and the pulse-width-modulation generator includes; a second comparator configured to receive the sensing signal and generate a second comparison signal based on at least information associated with the sensing signal; a logic controller configured to receive the second comparison signal and the first comparison signal and generate a control signal based on at least information associated with the first comparison signal and the second comparison signal; and a drive component configured to receive the control signal and generate the modulation signal based on at least information associated with the control signal.
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19. A method for protecting a power converter, the method comprising:
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generating a first voltage signal, the first voltage signal being associated with a first voltage magnitude; receiving the first voltage signal and an input signal, the input signal being associated with an input current for a power converter; processing information associated with the first voltage signal and the input signal; generating an output signal based on at least information associated with the first voltage signal and the input signal; processing information associated with the output signal; generating a modulation signal based on at least information associated with the output signal; and outputting the modulation signal to adjust the input current for the power converter; wherein the generating an output signal includes; generating the output signal in a first logic state in response to an input magnitude for the input signal being larger than an effective threshold magnitude; and generating the output signal in a second logic state in response to the input magnitude being smaller than the effective threshold magnitude; wherein; the first logic state and the second logic state are different; the effective threshold magnitude remains constant during a first substantial period of time; the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; the effective threshold magnitude remains constant during a third substantial period of time; the receiving the first voltage signal and an input signal includes receiving a second voltage signal, the second voltage signal being associated with a second voltage magnitude; and the effective threshold magnitude is equal to the second voltage magnitude during the third substantial period of time. - View Dependent Claims (20, 21, 22)
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23. A method for protecting a power converter, the method comprising:
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generating a threshold signal, the threshold signal being associated with a threshold magnitude; receiving the threshold signal and a sensing signal, the sensing signal being associated with an input current for a power converter; processing information associated with the threshold signal and the sensing signal; generating a comparison signal based on at least information associated with the threshold signal and the sensing signal; processing information associated with the comparison signal; generating a modulation signal based on at least information associate with the comparison signal; and outputting the modulation signal to adjust the input current for the power converter; wherein; the threshold magnitude remains constant during a first substantial period of time; the threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope being not equal to zero; and the threshold magnitude remains constant during a third substantial period of time; wherein the generating a modulation signal based on at least information associate with the comparison signal includes; receiving the sensing signal; and generating the modulation signal based on at least information associated with the sensing signal and the comparison signal. - View Dependent Claims (24)
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Specification