Impact of output-voltage remote sensing on converter dynamics

Desired features of the output-voltage remote sensing are the improving of the static accuracy and transient response of the load voltage by reducing the effects of connection impedances. The application of remote sensing may, however, easily deteriorate the stability and performance of the converter by changing its internal dynamics significantly due to adding additional impedances into the converter. A typical effect of the pure cabling connection is an increase in the capacitive-load sensitivity especially at high frequencies. Resonant-type connection impedance may change the internal dynamics more profoundly making the converter also more prone to the source and load interactions. The paper provides consistent methods to analyze the impact of the remote sensing on the converter dynamics based on a general two-port model of an electrical voltage-output system. Buck converters are used to provide practical evidence. Copyright (c) 2007 Praise Worthy Prize S.r.l. - All rights reserved.