SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS BASED ON AT LEAST FEEDBACK SIGNALS
First Claim
1. A system controller for protecting a power conversion system, the system controller comprising:
- a protection component configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal; and
a driving component configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system;
wherein;
the detected voltage is related to an output voltage of the power conversion system; and
the demagnetization signal is related to a demagnetization period of the power conversion system;
wherein the protection component and the driving component are further configured to, if the detected voltage and the demagnetization signal satisfy one or more conditions, output the driving signal to cause the switch to open and remain open in order to protect the power conversion system.
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Abstract
System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal. The driving component is configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system. The detected voltage is related to an output voltage of the power conversion system. The demagnetization signal is related to a demagnetization period of the power conversion system.
136 Citations
44 Claims
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1. A system controller for protecting a power conversion system, the system controller comprising:
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a protection component configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal; and a driving component configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system; wherein; the detected voltage is related to an output voltage of the power conversion system; and the demagnetization signal is related to a demagnetization period of the power conversion system; wherein the protection component and the driving component are further configured to, if the detected voltage and the demagnetization signal satisfy one or more conditions, output the driving signal to cause the switch to open and remain open in order to protect the power conversion system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system controller for protecting a power conversion system, the system controller comprising:
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a protection component configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, receive a current-sensing signal associated with a primary current flowing through a primary winding of the power conversion system, process information associated with the demagnetization signal, the current-sensing signal, and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage, the demagnetization signal, and the current-sensing signal; and a driving component configured to receive the protection signal and output a driving signal to a switch configured to affect the primary current flowing through the primary winding; wherein; the detected voltage is related to an output voltage of the power conversion system; and the demagnetization signal is related to a demagnetization period of the power conversion system; wherein the protection component and the driving component are further configured to, if the detected voltage, the demagnetization signal and the current-sensing signal satisfy one or more conditions, output the driving signal to cause the switch to open and remain open in order to protect the power conversion system. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method for protecting a power conversion system, the method comprising:
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receiving a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system; processing information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal; generating a protection signal based on at least information associated with the detected voltage and the demagnetization signal; receiving the protection signal; generating a driving signal based on at least information associated with the protection signal; and outputting the driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system; wherein; the detected voltage is related to an output voltage of the power conversion system; and the demagnetization signal is related to a demagnetization period of the power conversion system; wherein the process for outputting a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system includes, if the detected voltage and the demagnetization signal satisfy one or more conditions, outputting the driving signal to cause the switch to open and remain open in order to protect the power conversion system.
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44. A method for protecting a power conversion system, the method comprising:
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receiving a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system; receiving a current-sensing signal associated with a primary current flowing through a primary winding of the power conversion system; processing information associated with the demagnetization signal, the current-sensing signal, and a detected voltage generated based on at least information associated with the feedback signal; generating a protection signal based on at least information associated with the detected voltage, the demagnetization signal, and the current-sensing signal; receiving the protection signal; generating a driving signal based on at least information associated with the protection signal; and outputting the driving signal to a switch configured to affect the primary current flowing through the primary winding; wherein; the detected voltage is related to an output voltage of the power conversion system; and the demagnetization signal is related to a demagnetization period of the power conversion system; wherein the process for outputting a driving signal to a switch configured to affect the primary current flowing through the primary winding includes, if the detected voltage, the demagnetization signal and the current-sensing signal satisfy one or more conditions, outputting the driving signal to cause the switch to open and remain open in order to protect the power conversion system.
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Specification