Dynamic voltage transition control in switched mode power converters

摘要

A switched mode power converter includes a power stage, a main compensator, and a voltage ramp circuit. The power stage is operable to output a voltage to a load. The main compensator is operable to control switching of the power stage so that the voltage output by the power stage corresponds to a target voltage indicated to the switched mode power converter. The voltage ramp circuit includes a voltage ramp generator and a dynamic voltage transition compensation circuit. The voltage ramp generator is operable to generate a voltage ramp that starts at a first voltage corresponding to the target voltage and ends at a second voltage corresponding to a new target voltage. The dynamic voltage transition compensation circuit is responsive to the voltage ramp generator and operable to modify the output voltage response of the switched mode power converter based on one or more compensation parameters.

主权项

1. A voltage regulator controller, comprising:
a main compensator operable to control a voltage regulator so that a voltage output by the voltage regulator corresponds to a target voltage indicated to the voltage regulator controller; and a voltage ramp circuit, comprising:
a voltage ramp generator operable to output a voltage ramp that starts at a first voltage and ends at a second voltage, and to determine a slew rate for a dynamic voltage transition in the voltage ramp; anda dynamic voltage transition compensation circuit responsive to the voltage ramp generator and operable to modify the output voltage response of the voltage regulator based on one or more compensation parameter, the dynamic voltage transition compensation circuit comprising a ramp slew rate optimizer operable to modify the slew rate of the voltage ramp.