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    SD4928 is an IEEE 802.3af/at/bt-compliant powered device controller. It provides the powered devices (PD) in Power over Ethernet (PoE) with detection, classification, mark, and inrush current control. This IC also integrates on-chip detection resistors, has built-in undervoltage protection and overtemperature protection, and provides power good signal.

    At the same time, the magnitude of auxiliary supply voltage can be detected through AUX pin, when it reaches to rated voltage, it gives priority to PD; The T2P output indicates the number of classification events received during IEEE 802.3-compliant mutual identification and negotiation with PSE.


Main feature
  • Complete power interface for IEEE 802.3af/at/bt-compliant powered device

  • Supports up to 71.3W PDs

  • Integrated on-chip detection resistor

  • External Hot Swap N-Channel MOSFET for lowest power dissipation and highest system efficiency

  • Inrush current limit, with limit current settable externally

  • Supports external power access

  • Undervoltage protection

  • Overtemperature protection


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SD4928 MSOP-10-185-0.5 SD4928 Halogen free Tube
SD4928TR MSOP-10-185-0.5 SD4928 Halogen free Tape & Reel
Documents
title Types of Size (KB) date Download the latest English version
SD4928 0 1970-01-01 SD4928 Brief Datasheet