Adaptive controller for control of a DC-DC power supply

摘要

The present application provides a tunable compensator providing a control signal to control a switch in a power supply. A measurement is taken of the level of activity of the control signal. This measurement is used to introduce a bias into a tuner tuning the compensator when the amount of activity in the control signal drops.

主权项

1. A controller for a power supply, the controller being configured to provide a control signal to maintain the output of the power supply at a set-point, the controller comprising:
a compensator having a tunable control function, a tuner implementing a tuning algorithm using measurements from the compensator to provide at least one tuning value to tune the tunable control function of the compensator, a bias mechanism configured to measure the activity of the control signal and to provide a bias signal to the tuning algorithm of the tuner in response to the measured activity of the control signal, wherein the measured activity of the control signal is a measurement of the variance of the control signal and wherein the bias mechanism includes a low pass filter for providing a time average estimate of the measured activity of the control signal and wherein the tuning algorithm does not employ limit cycle oscillations.