POWER SUPPLY WITH DUAL ASYMMETRICAL INPUTS

摘要

A dual asymmetric input power supply architecture for use in power systems employing input power source redundancy. The dual asymmetric input power supply operates from a main input of the power supply when acceptable voltage is present on the main input. If the main input fails or is out of tolerance, power can be supplied from an auxiliary input through a transformer isolated switching converter. The dual asymmetric input power supply architecture maintains the high efficiency of a single-input power supply while providing an auxiliary connection for input power source redundancy.

主权项

1. A method of enabling an auxiliary power input to a power converter, the power converter including a primary power input and a converter stage coupled to the primary power input that converts an unregulated input voltage at a converter input to a regulated output voltage at a power converter output, the method comprising:
monitoring the primary power input; detecting a failure condition of the primary power input; and activating an auxiliary switching mode input circuit, in response to detecting the fail condition, to provide a rectified voltage at the converter input from the auxiliary power input.