DIGITAL-TO-ANALOG CONVERTER TO PRODUCE PAIRED CONTROL SIGNALS IN A POWER SUPPLY CONTROLLER
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United States of America Patent
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app pub date -
Oct 30, 2013
filing date -
Dec 18, 2009
priority date (Note) -
Abandoned
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Abstract
An controller for use in a power supply includes a variable oscillator and a digital-to-analog converter (DAC). The variable oscillator generates a switching signal to control a first switch of the power supply to regulate an output current of the power supply. The variable oscillator sets a duration of an on-time of the switching signal to be inversely proportional to a magnitude of a first analog signal. The variable oscillator also sets a switching period of the switching signal to be inversely proportional to a magnitude of a second analog signal. The digital-to-analog converter (DAC) converts binary digits into the first and second analog signals, such that a sum of the magnitude of the first analog signal and the magnitude of the second analog signal is a fixed value.
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