A METHOD AND CIRCUIT FOR INCREASING PWM RESOLUTION IN DIGITAL CONTROLLED DC TO DC CONVERTERS

摘要

A method for increasing PWM duty cycle resolution in a Digital controlled to DC to DC (DC2DC) converter, the method comprising: Defining a calculated PWM duty cycle D wherein D ≥ D_f ,and generating a sequence of n (integer) PWM cycles with varying duty cycles, wherein k (kn) PWM cycles have a duty cycle of D_f and (n-k) PWM cycles have a duty cycle of D_f +1, and wherein D_f + (n-k)/n is closest to D.