Methods, Systems, and Devices for Controlling Current Leakage of Data Interfaces

An interface device, comprising:

• a power supply interface configured to receive a power supply signal;
• a signal interface configured to exchange input/output signals with a computer device;
• a driver circuit coupled to the signal interface, wherein the driver circuit is powered via a driver supply port and configured to provide an output signal via the signal interface;
• and
• a power control component coupled to the power supply interface, the signal interface, and the driver supply port, wherein the power control component is configured to electrically decouple the power supply interface from the driver supply port when a voltage level of the power supply interface is lower than a voltage level of the signal interface.

A method for controlling leakage current, comprising:

• providing a power supply interface configured to receive a power supply signal;
• providing a signal interface configured to exchange input/output signals with a computer device;
• providing a driver circuit coupled to the signal interface, wherein the driver circuit is powered via a driver supply port and configured to provide an output signal via the signal interface;
• and
• providing a power control component coupled to the power supply interface, the signal interface, and the driver supply port, wherein the power control component is configured to electrically decouple the power supply interface from the driver supply port when a voltage level of the power supply interface is lower than a voltage level of the signal interface.