Power converter overvoltage system
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United States of America Patent
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Jul 18, 2017
Issued Date -
N/A
app pub date -
Aug 30, 2016
filing date -
Aug 30, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Power converters their methods of operation are described. An example method includes regulating an output using a switching circuit that responds to a control signal. The method includes comparing a feedback voltage from the output to a reference voltage using an error amplifier to create an error voltage, and comparing the error voltage to a ramp voltage from a periodic ramp signal using a comparator to create a PWM signal. The PWM signal is used in combination with the switching circuit to regulate the output. The method includes: clamping the error voltage, using a clamping circuit, if the error voltage drops below a lowest value for the periodic ramp signal while the power converter is regulating a load; and unclamping the error voltage, using the clamping circuit, if the error voltage rises above the lowest value for the periodic ramp signal while the power converter is regulating the load.
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