System and method for increasing effective pulse-width modulated drive signal resolution and converter controller incorporating the same
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United States of America Patent
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Nov 15, 2005
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N/A
app pub date -
Mar 30, 2004
filing date -
Mar 30, 2004
priority date (Note) -
Expired
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Abstract
A system for, and method of, increasing effective pulse-width modulated (PWM) drive signal resolution and a power converter incorporating the system or the method. In one embodiment, the system includes: (1) a duty cycle calculator configured to calculate a theoretical duty cycle for a PWM drive signal to be provided to an associated power converter based on at least one operating condition thereof, the theoretical duty cycle not a member of a pre-established set of allowable duty cycles and (2) a duty cycle approximator coupled to the duty cycle calculator and configured to generate a sequence of members of the set of allowable duty cycles, wherein the sequence at least approximately averages to the theoretical duty cycle.
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