Delete comment from: Ken Shirriff's blog
Ken Shirriff said...
Blu: yes, the brick has intelligence. The microcontroller in the brick monitors the output voltage and current to detect when the charger has been plugged into the laptop. At that point it enables the full output voltage. This microcontroller also shuts down the charger if it detects a short circuit or overload.
Nov 14, 2016, 2:02:17 PM
Posted to Teardown and exploration of Apple's Magsafe connector

