Silicon Labs Si3406x PoE+ powered device ICs

The Si3406x Power over Ethernet Plus (PoE+) powered device (PD) family, from Silicon Labs, integrate all necessary high-voltage discrete components on a single PD chip.

The ICs are said to reduce time to market and system cost for a variety of high-efficiency, high-power PoE+ PD applications. They deliver 30 W of power to support feature-rich Internet of Things (IoT) products like voice over IP (VoIP) devices, motor-positioned IP and security cameras, and other industrial devices.

As the demand for high-wattage IoT applications increases, developers must rely on powered devices that support the PoE+ standard. The ICs convert the high voltage supplied over Ethernet copper cabling into a regulated, low-voltage DC supply. They offer a broad array of feature options, including reduced EMI; flexible power conversion options; a robust sleep mode augmented with mode control, wake pin and LED driver; and full IEEE 802.3at compliance.

The family includes the flagship Si3406 IC; the Si34061 variant, which adds support for external FETs and to improve power conversion efficiency; and the Si34062 variant, which includes support for sleep modes with wake function, as well as LED drive capability. The 20-pin Si3406 IC and 24-pin Si34061 and Si34062 are housed in a compact, 5 x 5 mm QFN package and support an operating temperature range of -40 to +85°C.