US 12,470,418 B2
Power status telemetry for powered devices in a system with power over ethernet
Gaoling Zou, San Jose, CA (US); Alberto Viviani, Mountain View, CA (US); Yangyang Wen, Austin, TX (US); and Qicheng Huang, San Jose, CA (US)
Assigned to MAXIM INTEGRATED PRODUCTS, INC., San Jose, CA (US)
Filed by MAXIM INTEGRATED PRODUCTS, INC., San Jose, CA (US)
Filed on Feb. 19, 2024, as Appl. No. 18/444,983.
Application 18/444,983 is a continuation of application No. 17/468,026, filed on Sep. 7, 2021, granted, now 11,936,485.
Claims priority of provisional application 63/085,993, filed on Sep. 30, 2020.
Prior Publication US 2024/0275622 A1, Aug. 15, 2024
Int. Cl. G06F 1/00 (2006.01); H04B 10/80 (2013.01); H04L 12/10 (2006.01); G06F 1/3203 (2019.01)
CPC H04L 12/10 (2013.01) [H04B 10/802 (2013.01); G06F 1/3203 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A powered device in a system employing power over ethernet, the powered device comprising:
a powered device interface including a telemetry circuit configured to generate encoded telemetry information for output via the powered device interface;
a microcontroller coupled with the powered device interface; and
one or more opto-couplers coupled with the powered device interface, the one or more opto-couplers configured to electrically isolate the powered device interface from the microcontroller,
wherein the microcontroller is configured to generate at least one of power limit information or current limit information for transmission to the powered device interface via the one or more opto-couplers,
wherein the encoded telemetry information includes a start pulse width, a first data pulse width, and a second data pulse width, wherein each of the start pulse width, the first data pulse width, and the second data pulse width differs from each other of the start pulse width, the first data pulse width, and the second data pulse width.