[原创]Microchip PD70211带开关稳压器的供电(PD)控制器解决方案

Microchip公司的PD70211是具有集成的开关脉宽调制(PWM)稳压器控制的先进的PD接口集成电路,用于PoE应用的供电设备.器件支持IEEE® 802.3af, IEEE 802at, HDBaseT和一般2/4对配置. PD70211前端包括支持2,3,4和6事件分类的先进分类区块.采用SUPP_Sx引脚,它还确认四对电缆,实际上接收功率和产生合适的标识.器件具有内部增值堆,用于DC/DC转换器快速放电输入电容,在突然移除和重新插入以太网电缆到RJ-45时,保证快速重新检测和端口加电.先进的PWM电流模式部分支持同步反激,有源箝位正激拓扑,以及降压,升压等拓扑.器件集成了0.3 Ω 隔离FET,浪涌电流限制,在检测时小于10 μA失调电流,采用无铅QFN-36(6mmx6mm)封装.主要用在高达95W的HDBaseT ,IEEE 802.3af 和IEEE 802at, 电力转发和室内和户外PoE.本文介绍了PD70211主要特性, 基本PD框图,前端部分框图和PWM部分框图, 评估板EV96C70A主要特性和框图,电路图,材料清单和PCB设计图.

Microchips PD70211 is an advanced PD interface IC with integrated switching Pulse-Width Modulation (PWM) regulator control for powered devices in PoE applications. It supports IEEE® 802.3af, IEEE 802at, 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 the four pairs of cable that actually receive power and generate appropriate flags.

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