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STMicroelectronics STEVAL-POE001V1 PoE PD Evaluation Board

STMicroelectronics STEVAL-POE001V1 PoE (Power over Ethernet) PD (Powered Device) Evaluation Board is a demonstration platform and reference design for the PM8805 IEEE802.3bt PoE-PD SoC (System on Chip). The PM8805 SoC combines two active bridges and their driving circuitry, a charge pump to drive high-side MOSFETs, a hot-swap MOSFET, and the standard single-signature IEEE 802.3bt-compliant interface. The PM8805 IEEE 802.3 interface includes detection, classification, UVLO, and inrush current limitation. The active bridges sustain up to 1.0A current and the hot-swap MOSFET is designed to safely work up to 2.0A. The device performs the IEEE 802.3bt physical layer classification scheme, providing the system with an indication of successful PSE-type. The device identifies a 4-pair PSE, monitoring the pairs of the Ethernet cable and providing the system with a dedicated matrix of Tx signals. The device works with power either from the Ethernet cable or from an external power source such as a wall adapter, with the likelihood of the auxiliary source being prevalent over PoE. The PM8805 SoC is suitable to build the interface section of PoE switch mode power supplies targeting the highest conversion efficiency, and provides a PGD signal that can be used to enable a PWM controller, a DC-DC converter, or a LED driver.

Features

  • System in package including a dual active bridge, a hot swap MOSFET and a PoE-PD interface
  • Robust 100V N-ch MOSFETs with 0.2Ω total path resistance for each active bridge
  • Robust 100V, 0.1Ω high side N-ch hot swap MOSFET
  • PoE-PD single-signature interface compliant with IEEE 802.3bt Draft 3.7
  • Detection and support of high power, 4-pair applications
  • Identifies which kind of PSE (standard or legacy) it is connected with, and provides successful IEEE802.3 af/at/bt classification indication through combination of the T0, T1, and T2 signals (open drain)
  • Programmable classification current with 3.3ms delay
  • Advanced energy-saving MPS timings
  • Two step hot swap current protection
    • DC with 1ms delay
    • Overload with 10µs delay
  • Startup phase (pre-charge of the output capacitor), performed using an internally limited current source
  • PGD signal (open drain) to enable an external PWM controller
  • Thermal shutdown protection
  • RoHS compliant
  • WEEE compliant

Associated Product

STMicroelectronics PM8805 IEEE 802.3bt PoE-PD Interface

A system-in-package for smart power supplies that is applicable for power levels up to 99.9W.

Learn Moreà propos de STMicroelectronics PM8805 IEEE 802.3bt PoE-PD Interface View Productslié à STMicroelectronics PM8805 IEEE 802.3bt PoE-PD Interface

Layout

Chart - STMicroelectronics STEVAL-POE001V1 PoE PD Evaluation Board

Dimensions

Chart - STMicroelectronics STEVAL-POE001V1 PoE PD Evaluation Board
Publié le: 2019-02-11 | Mis à jour le: 2023-02-20