Method of digital control of PWM converters achieving fast transient response and low steady-state jittering
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United States of America Patent
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Feb 12, 2013
Grant Date -
Mar 18, 2010
app pub date -
Sep 1, 2009
filing date -
Sep 12, 2008
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Expired
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Abstract
A pulse width modulator (PWM) control system for a power converter achieves a fast transient response and low steady-state jittering. The control system manages the ADC sample timing to reduce noise susceptibility, and the ADC includes a regulation bin or dead band to minimize large phase corrections and thus eliminate limit cycling. The PWM module includes a dithering circuit to accumulate fractional PWM control signals to reduce period jitter by increasing the effective resolution of the pulse width modulator.
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