A powered device includes a power supply input, a diode bridge, and a power loss detector. The power supply input is responsive to an external power source. The diode bridge has an input to receive at least one power supply input. The power loss detector includes an input responsive to the power supply input. The power loss detector is adapted to detect a power loss event and to initiate a power shutdown. In one embodiment, the powered device includes a load circuit to receive a power supply voltage from the diode bridge. The load circuit is responsive to the power loss detector to perform a power shutdown operation.