POWER SOURING EQUIPMENT CHIP POWER OVER ETHERNET EQUIPMENT AND METHOD

摘要

A power souring equipment (PSE) chip power over Ethernet (PoE) equipment and method the method being capable of determining the access situation of a powered device (PD) of a corresponding terminal when powering with four cable pairs. PSE chip comprises a channel controller a first channel detector and a second channel detector; the channel controller transmits a first detection voltage along a first group of cable pair in Ethernet twisted pair cables via the first channel detector and transmits a second detection voltage along a second group of cable pair in Ethernet twisted pair cables via the second channel detector; and determining a first impedance according to the current detected by the first detection voltage and the first channel detector and determining a second impedance according to the current detected by the second detection voltage and the second channel detector; and determining the first group of cable pair connected to an effective PD when the first impedance is within a preset range and determining the second group of cable pair connected to the effective PD when the second impedance is within a preset range.