DI-70, DPA424PN, PoE Detection and Classification (Class 0) Interface Circuit
Referans tasarım tarafından: Power Integrations
DI-70, Reference Design for DPA424PN, PoE Detection and Classification (Class 0) Interface Circuit. The PoE specification requires the PD to provide three functions: detection, classification, pass-switch connection. When an input voltage is first applied to the PD, it must present the correct detection impedance in the voltage range of 2.5 to 10VDC.This impedance is provided by R51
