Charging system and charging method thereof

摘要

A charging system includes a transmission line, a power adaptor, and an electronic device. The transmission line includes a first terminal and a second terminal. The power adaptor is coupled to the first terminal and generates a charging voltage and a first voltage signal. The charging voltage is at a first voltage level. The electronic device is coupled to the second terminal and receives the first voltage signal. When the first voltage signal is larger than a first preset voltage signal, the electronic device outputs a second voltage signal to the power adaptor. When the second voltage signal is larger than a second preset voltage signal, the power adaptor adjusts the charging voltage into a second voltage level.

主权项

1. A charging system comprising:
a transmission line including a first terminal and a second terminal; a power adaptor coupled to the first terminal and generating a charging voltage and a first voltage signal, wherein the charging voltage is at a first voltage level; and an electronic device includes: a comparing unit coupled to the second terminal and receiving the first voltage signal; a switching unit coupled to the comparing unit; a stabilizing unit coupled to the comparing unit and the switching unit; and a power supplying unit coupled to the switching unit and the comparing unit, and outputting the second voltage signal, wherein when the first voltage signal is larger than the first preset voltage signal, the second voltage signal is transmitted to the second terminal via the switching unit, and the second voltage signal is outputted to the power adaptor.