US 11,740,672 B2
Multiport USB power adaptor and control methodology
Chuan-yu Lin, Taipei (TW); Jen-Hui Cheng, Taipei (TW); Hua-ping Cao, Shenzhen (CN); Yong-shuang Zhu, Shenzhen (CN); and Hsiang-Nien Kuo, Taipei (TW)
Assigned to Cypress Semiconductor Corporation, San Jose, CA (US)
Filed by Cypress Semiconductor Corporation, San Jose, CA (US)
Filed on Jul. 28, 2021, as Appl. No. 17/387,833.
Claims priority of provisional application 63/182,112, filed on Apr. 30, 2021.
Prior Publication US 2022/0350388 A1, Nov. 3, 2022
Int. Cl. G06F 1/26 (2006.01); G06F 13/42 (2006.01)
CPC G06F 1/266 (2013.01) [G06F 13/4282 (2013.01); G06F 2213/0042 (2013.01)] 19 Claims
OG exemplary drawing
 
12. A universal serial bus power delivery (USB-PD) power adaptor comprising:
a flyback-converter;
a plurality of buck-circuits coupled between the flyback-converter and a plurality USB ports, each of the plurality of buck-circuits operable to receive a single input voltage (VIN) from the flyback-converter and to output a requested voltage to one of the plurality of USB ports;
a plurality of bypass circuits, each operable to bypass one of the plurality of buck-circuits and couple VIN from the flyback-converter directly to one of the plurality of USB ports; and
a USB controller coupled to the flyback-converter, the plurality of bypass circuits and the plurality of buck-circuits, the USB controller operable to operate the USB PD power adaptor in a variable-buck-input-mode,
wherein when a first USB port of the plurality of USB ports is connected to a first device, the USB controller is operable to:
operate the flyback-converter to generate and regulate a VIN equal to a first output voltage (VOUT_C1) requested by the first device; and
enable a first bypass circuit of the plurality of bypass circuits to bypass a first buck-circuit of the plurality of buck-circuits to couple VIN to the first USB port.