Class 4 30 W PoE + Powered Device with PD Interface and Switching Regulator

Si3406x PoE+ Powered Devices are the most highly integrated, IEEE 802.3 at Type 2-compliant, PoE PD interface and pulse-width-modulated (PWM) switching regulator ICs in the industry. Easily add PoE + functionality to Ethernet products with the Si3406x device's lowest overall BOM cost, efficiency and reliability. When included in the design of a PoE-enabled system, such as an IP camera, wireless access point or VoIP phone, an Si3406x IC converts the high voltage (typically >48 V) supplied over Ethernet copper UTP cabling into a regulated, low-voltage dc supply. Si3406x products combine all the required IEEE 802.3at Type 2 detection, classification and hot swap interfaces with a complete, high-efficiency PWM switching regulator. Si3406x devices provide the industry’s greatest integration of high voltage discrete devices onto the PD chip, PoE+ power capability, flexible power conversion topology options with up to 90% efficiency, robust sleep/wake/LED support modes and superior EMI performance, enabling cost-effective, high power, highly efficient PoE PD-powered solutions.

Si3406 devices feature the flagship PoE+ PD offering. Si34061 adds support for very high power applications and maximum efficiency, and Si34062 adds support for very low standby power applications, including sleep and wake features.

FETs
Internal or external
Interface
Integrated dc dc converter

Class 4 30 W Powered Device Common Specs

  • Supports non-isolated and isolated switching topologies
  • Fully integrated high-voltage devices
  • Two complete diode bridges
  • Transient voltage suppressor
  • Switching regulator driver FET
  • Current-limited hot swap switch
  • Comprehensive protection circuitry
  • Transient over-voltage protection
  • Under voltage lockout
  • Thermal shutdown protection
  • Fold back current limiting
  • Low-EMI slew rate control
  • Secondary sync FET driver
  • Type 2 present indicator
  • Automatic maintain power signature (MPS) support
  • PWM switching frequency control
  • Sleep mode control
  • External hotswap and switching FET modes (Si34061)
  • Auxiliary adapter power sense (Si34061)
  • Advanced Sleep/Wake modes with LED (Si34062)
  • Transformer winding efficiency enhancer (Si34061/62)

Jump Start Your PoE Powered Device Development

PoE Powered Device (PD) design involves achieving IEEE compatibility and creating an efficient, stable, and EMI compliant power supply. Our complete portfolio of evaluation boards (EVBs) offer complete PD designs ready to be incorporated into an end system. All of our PoE PD EVBs are EMI compliant and include an IEEE compatibility report, detailed power supply performance analysis, and schematics in the user's guide.

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Part Number Description IEEE Specification Maximum Output Power (W) Package Type Package Size (mm) Auto MPS Support Aux Adapter Support Transformer Bias Winding Input DC DC Efficiency (%) Sleep Mode Switching Frequency Range (kHz) Synchronous FET Driver Temperature Range (ºC)
IEEE 802.3at Type 2 PD interface with high-efficiency dc-dc converter 802.3 at Type 2 30 QFN24 5x5 90 Basic -40 85 -40 85

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