A flexible, reliable and economical DC to DC power converter system
includes a plurality of DC to DC converter units, a pulse width modulation
current share bus interconnecting the DC to DC converter units and a
synchronization signal connected to each of the DC to DC converter units
to synchronize each of the DC to DC converter units to the same frequency.
Each DC to DC converter unit includes a power section, a controller and a
standard universal interface connecting the power section to the
controller such that the power section can be changed to accommodate
different input voltages, output voltages and current loads without making
significant hardware changes in the controller. The controller includes a
digital signal processor having a calibration table matching control
parameters to the specific circuit characteristics of the power section.
The digital signal processor has a clock signal synchronized to the
synchronization signal, resolves master/slave contention for controlling
the output voltage in response to signals sent and received over the
current share bus and generates pulse width modulation power switch
control signals controlling the power section to operate in either dual or
single converter mode at different frequencies in response to varying
system output current demands.
