[原创] Microsemi PD70211高达95W室内外PoE解决方案

Microsemi公司的PD70211是集成了开关稳压器的以太网供电的PD控制器,支持IEEE802.3af, IEEE802at, HDBaseT和通用2/4线配置.其前端包括先进的分类区块,支持2/3/4/6级分类;PWM电流模式部分支持同步反激和有源钳位前向拓扑以及降压和升压等.主要用在室内外PoE.本文介绍了PD70211主要特性,功能框图和典型应用框图,以及评估板PD70211EVB72FW-12主要特性,框图,电路图,材料清单和PCB设计图.

PD70211 is an advanced PD Interface IC with integrated switching (PWM) regulator control for Powered Devices in PoE applications. It supports IEEE802.3af, IEEE802at, HDBaseT and general 2/4-pair configurations.

The PD70211 front-end includes an advanced classification block that supports 2, 3, 4, and 6 event classification. Using the SUPP_Sx pins, it also identifies which of the four pairs of the cable actually receives power and generates appropriate flags.

The IC features an internal bleeder for discharging the input capacitor of the DC/DC converter rapidly, so as to ensure fast re-detection and port power-up in case of sudden removal and re-insertion of the Ethernet cable into the RJ-45. The advanced PWM current-mode section supports synchronous Flyback and Active clamp Forward topologies, as well as Buck, Boost etc.

PD70211主要特性:
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