A method and system is provided for programming the digital filter
compensation coefficients of a digitally controlled switched mode power
supply within a distributed power system. The distributed power system
comprises a plurality of point-of-load (POL) regulators each comprising
at least one power switch adapted to convey power to a load and a digital
controller adapted to control operation of the power switch responsive to
a feedback measurement. The digital controller further comprises a
digital filter having a transfer function defined by plural filter
coefficients. A serial data bus operatively connects each of the
plurality of POL regulators. A system controller is connected to the
serial data bus and is adapted to communicate digital data to the
plurality of POL regulators via the serial data bus. The digital data
includes programming data for programming the plural filter coefficients.
The system controller further comprises a user interface adapted to
receive the programming data therefrom.