Microsemi PD69101混合信号高压以太网供电方案

Microsemi公司的PD69101是单端混合信号高压以太网供电(PoE)驱动器,它采用以太网开关和使能网络器件在同一电缆上共享电源和数据,能检测EEE802.3af-2003兼容的受电设备(PD)和IEEE802.3at大功率设备.DC输入电压44 - 57 VDC,内置了3.3V DC稳压器,工作温度从-40°到+85℃,具有超温保护和电压监视与保护等.本文介绍PD69101主要特性,方框图以及2对和4对(数据和供电)典型应用电路图.

Microsemi’s PD69101 is a single port, mixed-signal, high-voltage Power over Ethernet driver. The device is utilized in Ethernet switches and enables network devices to share power and data over the same cable. It enables detection of IEEE802.3af-2003 compliant PDs (Powered Devices) and IEEE802.3at High Power Devices, thus, ensuring safe power feeding and disconnection of ports with full digital control and a minimum of external components. Integrating power, analog and state of the art logic, the PD69101 device fits into a single 24-pin, plastic QFN package.

A “plug and play” device, the PD69101 executes all real time functions as specified in the IEEE802.3af-2003 (“AF”) and IEEE802.3at High Power (“AT”) standards, including load detection, “AF” and “AT” classification, and using Multiple Classification Attempts (MCA).

The PD69101 :
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