ON Semiconductor delivers new PoE controllers for IoT endpoints

By Gina Roos, editor-in-chief

ON Semiconductor recently launched two PoE-PD solutions, the NCP1095 and NCP1096 interface controllers, that integrate all of the features needed to implement a PoE interface, including detection, auto-classification, and current limiting. These IEEE 802.3bt-compliant controllers use either an external (NCP1095) or integrated (NCP1096) hot-swap FET that claim the lowest on-resistance available in a Type 3 or Type 4 PoE controller.

Supporting the controllers are the NCP1566 DC/DC controller, the FDMC8622 single MOSFET, and the FDMQ8203 and FDMQ8205 GreenBridge quad MOSFETs. These MOSFETs are said to be a more efficient alternative to a diode bridge in PoE applications. Together, these devices offer highly efficient PoE interfaces, delivering the standard limit of 90 W of power or a proprietary 100-W solution if more power is needed, said ON Semiconductor.

The new IEEE 802.3bt PoE standard supports high-speed connectivity up to 90 W of power over local area network (LAN) connections; however, ON Semiconductor’s solutions can extend it further to 100 W for systems such as telecommunications and digital signage. This is up from 30 W provided by the IEEE 802.at standard (PoE+).

ON Semiconductor said the new IEEE 802.3bt standard for PoE can enable more sophisticated IoT endpoints. This is in part due to the energy management “Autoclass” feature that allows powered devices (PD) to communicate their specific power requirements to the power sourcing equipment (PSE). This allows the PSE to allocate the right amount of power to each PD. Applications include smart sensors, building automation, and connected lighting.