Foreign matter detection method and power supply system with foreign matter detection function

Abstract

A power system capable of detecting a foreign object, includes a power supplier side, a power receiver side, and a cable. The power supplier side includes a power converter, a foreign object detectionand control circuit, and a pull-up circuit. The power converter supplies a supply voltage to the power receiver side according to a power supply control signal. The foreign object detection and control circuit generates the power supply control signal for controlling the power converter, and generates a foreign object detection and control signal according to a voltage at a supplier transmissionnode of the power supplier side, for determining whether a foreign object exists in the power receiver side. The pull-up circuit adjusts a level of a supply current which is supplied from the suppliertransmission node to the power receiver side.

Description

technical field [0001] The present invention relates to a foreign matter detection method and a power supply system with foreign matter detection function, in particular to a power supply system capable of adaptively adjusting the power supply transmission node from the power supply end to the power receiving end by detecting whether there is a foreign matter at the power receiving end. The level of the supply current at the end, thereby preventing the foreign object detection method of the receiving end from being corroded or damaged, and the power supply system with the foreign object detection function. Background technique [0002] Please refer to Figure 1A , which shows a schematic diagram of a prior art power supply system. Please refer to Figure 1B , which shows a schematic diagram of an abnormal state of a power supply system in the prior art. Please refer to Figure 1C , which shows a schematic diagram of another abnormal state of the power supply system in the...

AI Technical Summary

Problems solved by technology

In this case, the equivalent resistance at this end of the CCR terminal of the powered transmission node may cause the voltage value range to be higher or lower than the transmission interface specification

[0011] In the power supply systems 100a, 100b, and 100c of the prior art, if such abnormal conditions are not dealt with, the CCR may burn or continue to rust, which may cause danger or damage the electronic device 20 when the situation becomes more severe.

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