Adaptive overvoltage protection circuit and method, and power system including the same
First Claim
1. An adaptive over-voltage protection circuit comprising:
- an over-voltage protection reference voltage provider for determining an over-voltage protection reference voltage as a predetermined reference voltage of an over-voltage protection level by comparing a feedback signal corresponding to an output voltage supplied to a load with a feedback reference signal; and
an over-voltage signal output unit for outputting an over-voltage signal indicating an over-voltage by comparing an over-voltage protection voltage corresponding to the output voltage with the over-voltage protection reference voltage.
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Accused Products
Abstract
An adaptive over-voltage protection circuit includes an over-voltage protection reference voltage provider and an over-voltage signal output unit. The over-voltage protection reference voltage provider provides a voltage of an over-voltage protection level higher than that of an over-voltage protection voltage corresponding to an output voltage supplied to a load from among a plurality of different over-voltage protection levels as an over-voltage protection reference voltage when the output voltage reaches a range of a rated voltage of the load. The over-voltage signal output unit outputs an over-voltage signal indicating an over-voltage by comparing the over-voltage protection voltage with the over-voltage protection reference voltage.
48 Citations
20 Claims
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1. An adaptive over-voltage protection circuit comprising:
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an over-voltage protection reference voltage provider for determining an over-voltage protection reference voltage as a predetermined reference voltage of an over-voltage protection level by comparing a feedback signal corresponding to an output voltage supplied to a load with a feedback reference signal; and an over-voltage signal output unit for outputting an over-voltage signal indicating an over-voltage by comparing an over-voltage protection voltage corresponding to the output voltage with the over-voltage protection reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power system comprising:
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a power supply unit for generating an output voltage supplied to a load; an over-voltage protection voltage generator, which is connected between the output voltage and a ground voltage and generates an over-voltage protection voltage corresponding to the output voltage; a feedback signal generator, which is connected between the load and the ground voltage and generates a feedback signal corresponding to the output voltage; and an adaptive over-voltage protection circuit comprising an over-voltage protection reference voltage provider for receiving the over-voltage protection voltage and the feedback signal and determining an over-voltage protection reference voltage as a predetermined voltage of an over-voltage protection level by comparing the feedback signal and a feedback reference signal and an over-voltage signal output unit for outputting an over-voltage signal indicating an over-voltage by comparing the over-voltage protection voltage with the over-voltage protection reference voltage. - View Dependent Claims (14, 15, 16, 17)
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18. An adaptive over-voltage protection method comprising:
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a reference voltage providing operation of determining an over-voltage protection reference voltage as a predetermined voltage of an over-voltage protection level by comparing a feedback signal corresponding to an output voltage supplied with a load with a feedback reference signal; and an over-voltage signal outputting operation of outputting an over-voltage signal indicating an over-voltage by comparing an over-voltage protection voltage corresponding to the output voltage with the over-voltage protection reference voltage. - View Dependent Claims (19, 20)
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Specification