Reverse power feed (rpf) power supply unit (psu) and associated method of use
AssigneeMicrochip Technology Incorporated
InventorsRenato Colombo, Cesare Bocchiola
Life of this patent
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Abstract
A reverse power feeding (RPF) power supply unit (PSU) for remote network distribution point unit (DPU) that is reverse powered from multiple customer premise equipments (CPEs). A plurality of power converters, each having a different primary winding and sharing a common secondary winding of a transformer at the PSU, wherein only one of the power converters is operated at a time to provide a desired output voltage.
Claims20
A reverse power feed (RPF) power supply unit (PSU), the PSU comprising:
- at least one transformer comprising a plurality of primary windings and one secondary winding;
- a plurality of power converters sharing the secondary winding of the at least one transformer, wherein each of the plurality of power converters comprises;
- a unique one of the plurality of primary windings of the at least one transformer;
- a primary controller coupled to the unique one primary winding;
- an independent power port coupled to the unique one primary winding, the independent power port to provide an input voltage to be converted to an output voltage at the secondary winding of the at least one transformer;
- and
- a secondary controller coupled to each of the plurality of power converters, the secondary controller for activating only one of the power converters having an input voltage present at its independent power port at a time when an input voltage is present at the independent power port of two or more of the plurality of power converters sharing the secondary winding.
A reverse power feed (RPF) power supply unit (PSU) in a Distribution Point Unit (DPU), the PSU comprising:
- at least one transformer comprising a plurality of primary windings and one secondary winding;
- a plurality of power converters sharing the secondary winding of the at least one transformer, wherein each of the plurality of power converters comprises;
- one primary winding of the plurality of primary windings of the at least one transformer;
- a primary controller coupled to one primary winding;
- an independent power port coupled to the one primary winding, the independent power port to provide an input voltage, the input voltage to be converted to an output voltage at the secondary winding of the at least one transformer;
- and
- a secondary controller coupled to each of the plurality of power converters, the secondary controller for activating one at a time of the power converters having an input voltage present at its power port when an input voltage is present at the power port of two or more of the plurality of power converters sharing the secondary winding.
A method of operating a reverse power feed (RPF) power supply unit (PSU) comprising at least one transformer comprising a plurality of primary windings and one secondary winding and a plurality of power converters sharing the secondary winding of the at least one transformer, the method comprising:
- activating one of the plurality of power converters having an input voltage present at its independent power port when an input voltage is present at an independent power port of two or more of the plurality of power converters, wherein only one of the plurality of power converters is activated at a time and wherein each of the plurality of power converters of the PSU comprises;
- one primary winding of the plurality of primary windings of the at least one transformer and
- a primary controller coupled to the one primary winding;
- and
- converting the input voltage at the primary winding of the activated power converter to an output voltage at the secondary winding.
Dependencies are inferred from the claim text.