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Si34071 Datasheet 90w Powered Device

Manufacturer: Skyworks Solutions

Overview: Si34071 Data Sheet The Si34071 integrates the signaling, control, and power conversion functions required in a Power over Ethernet 802.3btpowered device (PD) application. The optimized architecture minimizes the solution footprint and external BOM while using standard, low cost ponents. The integrated PoE PD interface fully plies with the IEEE 802.3bt standard and uses external resistors to program the requested classification and detection signatures. Connection to the PSE switch is maintained during no-load condition by an optional maintain-power-signature (MPS) signal. An internal, current-mode controlled switching regulator converts the high voltage supplied over the 10/100/1000BASE-T Ethernet connection to a regulated, low-voltage output supply. The switching regulator supports isolated flyback and forward converter topologies. An external resistor tunes the switching frequency.

Key Features

  • include a main transformer bias winding input and a synchronous gate driver for secondary side FET control, or active clamp, depending on the topology. The Si34071 is available in a low-profile, 32-pin, 5 x 5 mm QFN package. KEY.

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