[原创]On Semi NCP1096以太网供电用电设备(PoE－PD)解决方案

On Semi公司的NCP1096是以太网供电(PoE−PD)系列产品,满足IEEE 802.3af/at 和 −3bt标准.它集成了PoE系统所需要的所有功能如检测,分类和涌流相的限流等功能.功率良好引脚保证了主DC/DC转换器的禁止/使能.当短时维持功率信号出现时NCP1096还提供自动分类支持和指示.此外辅助电源检测引脚使得NCP1096能采用PoE或墙上适配器供电NCP1096通过内部通过晶体管(70毫欧姆)支持大功率(高达90W PoE)的应用.器件支持多达5事件物理层分类,典型浪涌电流限制为110mA.器件具有过流保护,超温保护,结温度范围在−40C 到 +125C,16引脚TSSOP封装.主要用在以太网供电用电设备.本文介绍了NCP1096主要特性,框图,几种应用电路图及其典型材料清单,以及评估板NCP1095GEVB主要特性,电路图,材料清单和PCB设计图.

The NCP1096 is a member of the ON Semiconductor Power over Ethernet Powered Device (PoE−PD) product family, and allows the device containing the NCP1096 based PD to become an IEEE 802.3af/at and −3bt compliant powered equipment.

It incorporates all the required functions for operation within a PoE system such as detection, classification and current limiting during the inrush phase. The NCP1096 supports high-power applications (up to 90 W PoE) through an internal pass transistor. A power good pin guarantees proper disabling/enabling of the adjacent main DC/DC converter. The classification result pins allow for operation according to the assigned power Class (up to Class 8).

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