Patent ID: 9584018
Date: 2017-02-28
CPC Classifications: H02M

Claim:
1. A control system for maintaining an output voltage of a DC-DC converter constant the control system comprising: a first controller operating to provide a control signal to the DC-DC converter to maintain the output voltage constant; a transient controller for providing a second control signal, the transient controller comprising a transient detector for detecting a transient condition on the output voltage of the DC-DC converter and providing a transient control signal to the DC-DC converter to counter the transient upon detecting the transient condition; wherein the transient detector comprises: a signature calculator for calculating a time varying signature of the output voltage of the DC-DC converter, wherein the signature calculator comprises a multi-tap delay providing multiple delayed copies of the output voltage, and a plurality of subtractors for subtracting the multiple delayed copies of the output voltage from the output voltage to provide a series of individual difference values, wherein the series of individual difference values defines the time varying signature of the output voltage of the DC-DC converter; and a comparator to determine when the time varying signature extends a predefined margin from a previously stored signature.