LOW POWER STANDBY FOR POWERED DEVICE IN POWER DISTRIBUTION SYSTEM Russian patent published in 2019 - IPC H02J7/00 

FIELD: computing; counting.

SUBSTANCE: use: in a power distribution system, such as a Power over Ethernet power distribution system. Powered device provides a pulse, such as a maintain power signature, when in standby such that a power providing device remains providing power to it. To increase energy efficiency, the MPS can be cycled (60 ms pulse every 300 ms to 400 ms) according to the IEEE802.3at/af standards. By introducing a controllable switch, for electrically decoupling at least part of the powered device from the power providing device, and a pulse generator, the MPS can be generated in a more energy efficient way and/or can be shortened (for example, to 5 ms).

EFFECT: as an example, the controllable switch can decouple the bulk capacitor of the powered device during MPS generation to prevent the bulk capacitor from filtering out the MPS.

12 cl, 2 tbl, 14 dwg