# US 11,114,936 B2 · Adjusting output voltage of powered device ports > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,936 B2 - Document ID: US11114936B2 - Status: Granted - Kind: B2 - Application number: 15/699,457 - Filed: 2017-09-08 - Published: 2019-03-14 - Granted: 2021-09-07 - Earliest claimed: 2017-09-08 - Assignees: Hewlett Packard Enterprise Development LP - Applicants: Hewlett Packard Enterprise Development LP - Inventors: Deven Patel; Yu Liu; Sanh Huynh - Web page: https://patentgrep.com/patent/US11114936B2 ## CPC - H02M 3/04: by static converters - G06F 1/266: {Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips} - H02M 7/06: using discharge tubes without control electrode or semiconductor devices without control electrode - H04L 12/10: Current supply arrangements - H04L 12/40045: {Details regarding the feeding of energy to the node from the bus} - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An example system can determine a power consumption of each of a first and a second powered device ports, determine an output voltage demand of each of the first and the second powered device ports based on the determined power consumptions, and based on the output voltage demand, adjust an output voltage to each of the first and the second powered device ports via the power controller. ## Claims ### Claim 1 A system, comprising: a first powered device port communicatively coupled to a power controller; a second powered device port communicatively coupled to the power controller, wherein a first power sourcing equipment (PSE) device associated with the first powered device port has a different power classification than a second PSE device associated with the second powered device port; and a non-transitory machine readable medium communicatively coupled to the first and the second powered device ports and comprising instructions to share output voltages between the first powered device port and the second powered device port, wherein the instructions are executable by a processing resource to: determine a power consumption of each of the first and the second powered device ports; determine an output voltage demand of each of the first and the second powered device ports based on the determined power consumptions; and based on the output voltage demand, prioritize which of the first or the second powered device ports supplies more power and adjust an output voltage to each of the first and the second powered device ports via the power controller to a nonzero value. ### Claim 2 (depends on 1) The system of claim 1, wherein the power controller comprises a direct current (DC)-to-DC converter. ### Claim 3 (depends on 1) The system of claim 1, wherein the instructions executable to adjust the output voltage comprise instructions executable to prioritize the first powered device port over the second powered device port for a predetermined amount of time. ### Claim 4 (depends on 1) The system of claim 1, wherein a first power sourcing equipment (PSE) device associated with the first powered device port has a different power capacity than a second PSE device associated with the second powered device port. ### Claim 5 (depends on 1) The system of claim 1, wherein: a power classification of the first PSE device comprises a designation based on a power capacity of the first PSE device; and a power classification associated with the second PSE device comprises a designation based on a power capacity of the second PSE device. ### Claim 6 (depends on 1) The system of claim 1, further comprising: a first sensor communicatively coupled to the first powered device port to: sense a current of the first powered device port; and modulate a first feedback voltage to the first powered device port; and a second sensor communicatively coupled to the second powered device port to: sense a current of the second powered device port; and modulate a second feedback voltage to the second powered device port. ### Claim 7 (depends on 1) The system of claim 1, wherein the system comprises an access point. ### Claim 8 (depends on 1) The system of claim 1, wherein the first and the second powered device ports comprise power over Ethernet (PoE) ports. ### Claim 9 A system, comprising: a first powered device port with a first output voltage communicatively coupled to first powered device port controller to determine and monitor a power load on the first powered device port; a second powered device port with a second output voltage lower than the first output voltage and communicatively coupled to a second powered device port controller to determine a power load on the second powered device port, wherein a first power sourcing equipment (PSE) device associated with the first powered device port has a different power classification than a second PSE device associated with the second powered device port; a droop circuit communicatively coupled to the first powered device port to droop an output voltage of the first powered device port to approximately a same output voltage of the second powered device port; and a controller communicatively coupled to the first and the second powered device ports to: combine the drooped output voltage of the first powered device port and the output voltage of the second powered device port; prioritize which of the first or the second powered device ports supplies more power; and subsequently adjust the output voltages of the first powered device port and the second powered device port to a nonzero value in response to a change to a load of the system. ### Claim 10 (depends on 9) The system of claim 9, wherein the controller adjusts the output voltages of the first powered device port and the second powered device port based on feedback voltage associated with each of the first powered device port and the second powered device port. ### Claim 11 (depends on 9) The system of claim 9, wherein the controller adjusts the output voltages of the first powered device port and the second powered device port based on communication between the droop circuit and a different droop circuit communicatively coupled to the second powered device port. ### Claim 12 (depends on 9) The system of claim 9, wherein the first droop circuit is communicatively coupled to a different droop circuit to determine feedback modulation for output voltages associated with the first powered device port and the second powered device port. ### Claim 13 A method, comprising: receiving a first power load at a first power over Ethernet (PoE) port and a second power load at a second PoE port within an access point; prioritizing which of the first or the second PoE ports supplies more power; in response to the first power load increasing, automatically drooping an output voltage associated with the first PoE port to approximately match an output voltage associated with the second PoE port using a droop circuit communicatively coupled to the first PoE port; and combining the drooped output voltage associated with the first PoE port with the output voltage associated with the second PoE port, wherein a first power sourcing equipment (PSE) device associated with the first POE port has a different power classification than a second PSE device associated with the second PoE port, the dropped output voltage associated with the first PoE port and the output voltage associated with the second PoE port being nonzero. ### Claim 14 (depends on 13) The method of claim 13, further comprising drawing current from both the first PoE port and the second PoE port during a subsequent load increase. ### Claim 15 (depends on 13) The method of claim 13, further comprising adjusting a rate of the automatic drooping by adjusting at least one of a resistor and a capacitor within the droop circuit. ### Claim 16 (depends on 13) The method of claim 13, wherein the drooping of the output voltage associated with the first PoE port is in response to the first PoE port reaching a threshold output voltage level. ### Claim 17 (depends on 13) The method of claim 13, wherein the prioritizing comprises prioritizing the first PoE port over the second PoE port for a predetermined amount of time. ### Claim 18 (depends on 13) The method of claim 13, wherein automatically drooping the output voltage associated with the first PoE port comprises drooping the output voltage associated with the first PoE port without user input and without user prompting. ### Claim 19 (depends on 9) The system of claim 9, wherein the droop circuit adjusts a rate of the automatic drooping based on a resistance of a resistor and a capacitance of a capacitance within the droop circuit.