Universal and fault-tolerant multiphase digital pwm controller for high-frequency dc-dc converters
AssigneeExar Corporation
InventorsAleksandar Prodic, Zdravko Lukic
Life of this patent
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Abstract
A multiphase hybrid digital pulse width modulator can comprise a counter that is selectable between at least two different numbers of states to indicate a first portion of a switching period. Unclocked logic can indicate a second portion of the switching period. The unclocked logic can include a delay line.
Claims10
A delay cell using dual bias to control the delay of a signal through the delay cell, the delay cell having a coarse current bias control and a fine current bias control.
A multi-phase digital pulse width modulator (DPWM) whose power consumption does not linearly increase with switching frequency, allowing significant power savings and improving efficiency of low-power switch-mode power supplies operating at high frequencies, wherein the DPWM has dual biased delay cells
Dependencies are inferred from the claim text.