Patent ID: 9148026
Filing Date: 2015-09-29
Classification: H02J

Abstract:
1. A charger detection method configured to classify a potential charger coupled to a port of an electronic device, the charger detection method comprising: detecting connection of the potential charger to a USB-compatible port of the electronic device; upon connection of the potential charger and before applying a pull-down current, comparing a connection voltage of a first data line of the USB-compatible port to a logic threshold; if the connection voltage of the first data line is greater than the logic threshold, applying the pull-down current to first and second data lines of the USB-compatible port to provide a first test voltage on each of the first and second data lines; if the connection voltage of the first data line is less than the logic threshold, executing a primary detection process of a USB Battery Charging 1.2 Compliance Plan; and after applying a pull-down current to first and second data lines, if the first test voltage on each of the first and second data lines is not between a first threshold and a second threshold, executing the primary detection process of the USB Battery Charging 1.2 Compliance Plan.