# US 12,003,172 B2 · Power supply device, power supply system and method for controlling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,172 B2 - Document ID: US12003172B2 - Status: Granted - Kind: B2 - Application number: 18/181,977 - Filed: 2023-03-10 - Published: 2023-06-29 - Granted: 2024-06-04 - Earliest claimed: 2013-10-31 - Assignees: Csip Consulting Ltd. - Applicants: Csip Consulting Ltd. - Inventors: Young Seung Noh; Kwang Soo Choi; Bo Mi Lee; Chan Sung Jang - Web page: https://patentgrep.com/patent/US12003172B2 ## CPC - H02M 3/04: by static converters - H02M 3/33507: {with automatic control of the output voltage or current, e.g. flyback converters (H02M3/33561, H02M3/33569 take precedence)} - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter} - 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) ## Abstract A power supply system may include a target device and an adapter. The target device may include an adapter connection switch that receives adapter recognition information to form a connection with the adapter, a voltage detection unit that receives an output voltage from an adapter, and a voltage-change-requesting unit that outputs a voltage to request a voltage change based on information on the output voltage from the adapter. The adapter may include a device information recognition unit that receives the voltage to request a voltage change, and an output-voltage-changing unit that changes the output voltage based on the voltage to request a voltage change. ## Claims ### Claim 1 A power supply device to be connected to a power receiving device, the power supply device comprising: a power supply means for changing an input power into an output voltage; a voltage port for supplying the output voltage to the power receiving device; a ground port for matching a ground potential of the power receiving device with the power supply device; a control port for receiving a request signal, from the power receiving device, for determining an output voltage specification and sending a device information signal to the power receiving device, the control port being provided separately from the voltage port; a control means for controlling the power supply means based on the request signal so as to determine the output voltage specification and provide the output voltage to the voltage port; and device information output means for providing the device information signal indicating a type of the power supply device to the power receiving device through the control port, wherein the type of the power supply device indicates that the power supply device is an output-voltage variable device, and wherein, the voltage port, the ground port, and the control port are universal serial bus (USB) ports configured to be connected to a USB connector. ### Claim 2 (depends on 1) The power supply device of claim 1, wherein the device information output means includes a register and a switch connected to each other in series, and wherein the switch selectively connects the register to the control port. ### Claim 3 (depends on 1) The power supply device of claim 1, the control means comprising: a control unit configured to generate a control signal based on the request signal input through the control port; and an output unit configured to provide a feed-back to the power supply unit for determining the output voltage specification based on the control signal. ### Claim 4 (depends on 1) The power supply device of claim 1, wherein the power supply device further includes a device information recognition means for detecting the request signal based on a voltage level of the control port. ### Claim 5 A power receiving device to be connected to a power supply device, the power receiving device comprising: a voltage port for receiving an output voltage from the power supply device; a ground port for matching a ground potential of the power receiving device with the power supply device; a control port for receiving a device information signal from the power supply device and transmitting a request signal to the power supply device; a control means for generating the request signal for requesting an output power specification of the power supply device; and a connection switch configured to operably connect the control port to the control means so as to receive the device information signal from the power supply device through the control port and form a connection with the power supply device to send the request signal through the control port; wherein the voltage port, the ground port, and the control port are universal serial bus (USB) ports to be connected to a USB connector, and wherein the control port is provided separately from the voltage port. ### Claim 6 (depends on 5) The power receiving device of claim 5, wherein the device information signal represents capability of the power supply device. ### Claim 7 (depends on 6) The power receiving device of claim 6, wherein the control means generates the request signal reflecting the device information signal. ### Claim 8 (depends on 6) The power receiving device of claim 6, further comprising a voltage detection means for detecting the output voltage supplied through the voltage port. ### Claim 9 (depends on 8) The power receiving device of claim 8, further comprising: a battery; and a pass switch configured to selectively transmit the output voltage to the battery, wherein the control means is configured to turn on the pass switch in such a manner that the input voltage is transmitted to the battery when the output voltage, detected by the voltage detection unit, is the same as the rated voltage of the receiving device. ### Claim 10 (depends on 8) The power receiving device of claim 8, wherein the voltage detection means comprises voltage-dividing resistors having a first register and a second register, wherein the first register is coupled to the voltage port, and the second register is coupled to the ground port. ### Claim 11 (depends on 5) The power receiving device of claim 5, wherein the device information signal indicates that the power supply device is an output-voltage variable device. ### Claim 12 (depends on 5) The power receiving device of claim 5, wherein the control means comprises: a control unit configured to generate a control signal for determining the output voltage specification; and a voltage-change-requesting unit configured to output the request signal to the power supply device through the control port, based on the control signal.