US 12,261,525 B2
Power supply device, power supply system and method for controlling the same
Young Seung Noh, Suwon-Si (KR); Kwang Soo Choi, Suwon-Si (KR); Bo Mi Lee, Suwon-Si (KR); and Chan Sung Jang, Suwon-Si (KR)
Assigned to CSIP Consulting Ltd., Seoul (KR)
Filed by CSIP CONSULTING LTD., Seoul (KR)
Filed on Apr. 25, 2024, as Appl. No. 18/645,752.
Application 18/645,752 is a division of application No. 18/181,977, filed on Mar. 10, 2023, granted, now 12,003,172.
Application 18/181,977 is a division of application No. 17/961,174, filed on Oct. 6, 2022, granted, now 11,658,566, issued on May 23, 2023.
Application 17/961,174 is a division of application No. 14/273,444, filed on May 8, 2014, granted, now 11,515,783, issued on Nov. 29, 2022.
Claims priority of application No. 10-2013-0131602 (KR), filed on Oct. 31, 2013.
Prior Publication US 2024/0297579 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 3/335 (2006.01); H02M 3/04 (2006.01); G06F 1/26 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/04 (2013.01) [H02M 3/33507 (2013.01); G06F 1/26 (2013.01); H02M 1/0025 (2021.05)] 11 Claims
OG exemplary drawing
 
1. A power supply device to be connected to a power receiving device, the power supply device comprising:
a power supply unit for changing an input power into an output voltage;
an output-voltage changing unit providing a reference signal to the power supply unit for changing the output voltage based on the reference signal;
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 for sending a device information signal to the power receiving device, the control port being provided separately from the voltage port;
a control unit providing a control signal to the output-voltage changing unit based on the request signal so as to determine the output voltage specification; and
a device information output unit for providing the device information signal indicating a type of the power supply device to the power receiving device via the control port, wherein the type of the power supply device indicates that the power supply device is capable of output-voltage variable;
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.