Cross-channel interference can be a problem in multi-channel switched
power systems. A multi-channel switched power converter is provided a reference
count generator that generates a reference count signal that is commonly distributed
to multiple, pulse width modulating (PWM) channels of the converter. The common
reference count signal counts through a sequence of successive timing values. Events
in each channel are scheduled relative to the common reference count. Examples
of such events include the amplification or de-application of a driving voltage
pulse to an inductive means of the channel and the taking of voltage and current
measurement samples. Cross channel interference is avoided or minimized by scheduling
or re-scheduling events in each active channel so that they do not occur simultaneously
in potentially-interfering channels, for example the taking of a current measurement
sample in one channel and the turning on of an inductance-driving voltage pulse
is a second channel.
