Patent attributes
Power supplies, supplied with an input voltage to produce output voltages, are controlled in a desired sequence, and their output voltages are monitored, by respective state machines of two or more control units which are coupled in cascade by a bidirectional signal path on which commands and acknowledgements are coupled serially in frames. Within each control unit, each state machine communicates with all of the other state machines, so that the power supplies controlled by a single control unit can include divergent and convergent as well as linear sequence paths. The sequence is linear between adjacent control units, with logical combinations of received and locally-produced commands and acknowledgements. An input state machine in the first control unit in the cascade monitors the input voltage to initiate a power-up sequence.
