US 11,750,000 B2
Electronic device having USB power delivery function
Ya-Hsuan Sung, Hsinchu (TW); Leaf Chen, Hsinchu (TW); and Li-Cheng Chu, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed on Nov. 15, 2021, as Appl. No. 17/526,303.
Claims priority of application No. 109141021 (TW), filed on Nov. 23, 2020.
Prior Publication US 2022/0166241 A1, May 26, 2022
Int. Cl. H02J 7/00 (2006.01); H01R 13/703 (2006.01); H01R 13/66 (2006.01)
CPC H02J 7/00308 (2020.01) [H01R 13/6666 (2013.01); H01R 13/7031 (2013.01); H02J 7/0031 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electronic device having a universal serial bus (USB) power delivery function, comprising:
a connector, coupled to a USB host, and comprising a configuration channel pin;
an electrostatic discharge (ESD) protection circuit, coupled to the configuration channel pin of the connector;
a power reception notification circuit, coupled to the ESD protection circuit, and configured to turn on, in response to an enable signal, a pull-down path of a pull-down circuit of the ESD protection circuit, wherein the configuration channel pin generates a pull-down voltage through the pull-down path of the pull-down circuit when the pull-down path is turned on; and
a control circuit, coupled to the power reception notification circuit and the connector, and configured to send the enable signal to the power reception notification circuit when a trigger signal that meets a power reception condition is detected, wherein the control circuit controls the connector to draw power from the USB host when the pull-down voltage of the connector is greater than a pull-down threshold.