Patent ID: 9612640
Date: 2017-04-04
CPC Classifications: G06F

Claim:
1. A host device that supplies electric power to a terminal device, comprising: a host-side connector; a power supply unit configured to output a first voltage; a host-side power supply line connecting the power supply unit to the host-side connector; a first current measurement unit configured to measure a first current flowing through the host-side power supply line; and a host-side control unit configured to: wherein, when the second voltage is outside of a predetermined first reference range associated with the reference point on the terminal-device-side power supply line, the power supply unit is further configured to adjust the first voltage according to the first resistance value supplied from the host-side control unit and the first current value measured by the first current measurement unit such that the second voltage changes to a value within the predetermined first reference range, wherein when the second voltage is greater than the predetermined first reference range, the power supply unit is configured to reduce the first voltage such that the second voltage decreases to a value within the predetermined first reference range, and when the second voltage is less than the predetermined first reference range, the power supply unit is configured to increase the first voltage such that the second voltage increases to a value within the predetermined first reference range.