US 11,784,485 B2
USB Type-C port short protection
Yao Ding, San Jose, CA (US); and Hui Li, Mountain View, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Dec. 16, 2021, as Appl. No. 17/552,926.
Application 17/552,926 is a continuation of application No. 16/287,422, filed on Feb. 27, 2019, granted, now 11,233,386.
Prior Publication US 2022/0109294 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 3/08 (2006.01); H02H 9/02 (2006.01); H02H 1/00 (2006.01)
CPC H02H 3/08 (2013.01) [H02H 1/0007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A short circuit protection circuit, the short circuit protection circuit comprising:
a first configuration channel line extending from a first pin of an upstream facing universal serial bus (USB) type-C port;
a voltage divider connected to a first junction point on the first configuration channel line, the voltage divider comprising a resistor and a thermistor, wherein the thermistor is connected to a ground line;
a transistor directly connected to a second junction point between the resistor and the thermistor of the voltage divider, with no intermediary connection between the transistor and the second junction point, the transistor configured to turn on respondent to an output voltage at the second junction point being above a threshold value; and
a controller directly connected to the second junction point, with no intermediary connection between the controller and the second junction point, the controller configured to read the output voltage at the second junction point when there is voltage in the first configuration channel line and the second junction point.