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onsemi NCL31010 PoE Interface LED Driver

onsemi NCL31010 PoE Interface LED Driver integrates an IEEE 802.3bt PoE-PD (Power over Ethernet Powered Device) interface controller, a dual step-down converter, and a buck converter LED driver. The NCL31010 incorporates all the required functions for operation within a PoE system, such as detection, classification, and current limiting during the inrush phase. The NCL31010 contains synchronous step-down DC-DC converters for the main 3.3V system supply as well as an auxiliary supply. In addition, the NCL31010 also integrates a current-mode buck DC-DC controller designed to operate as a LED driver. The LED driver supports both PWM dimming and high−bandwidth analog dimming. The NCL31010 supports high-power applications up to 90W.

The onsemi NCL31010 PoE Interface LED Driver is housed in a 7.9mm x 7.0mm QFN-48 package with a -40°C to +85°C ambient operating temperature range. 

Features

  • Fully supports IEEE 3af/at and 802.3bt specifications
  • Assigned power level up to 90W
  • Proprietary 100W+ applications
  • Supports autoclass
  • HV maintains power PWM output (MPS)
  • Integrated 3.3V buck convertor
  • Integrated adjustable 2.5V to 24.0V buck convertor
  • Integrated high-efficiency buck LED driver
  • Adjustable 44.4kHz to 1.0MHz switching frequency
  • Deep dimming to zero with an accuracy of 1% using internal precision 2.4V reference
  • High linearity
  • High ~50kHz modulation bandwidth
    • Visual light communication capable
    • Yellow-Dot™ compliant
  • Internal DIM DAC for independent LED control during microcontroller re-flashing (Warm Boot)
  • Low EMI reference design
  • I2C/SPI interface
  • High accuracy diagnostic functions to measure voltages and currents
  • Protection against LED shorts and opens
  • LED over/under voltage and over current protection
  • Chip over current protection
  • Chip and LED over-temperature protection
  • -40°C to +125°C junction temperature range
  • -40°C to +85°C ambient operating temperature range
  • 7.0mm x 7.0mm QFN-48 package; 05mm pitch
  • Pb-free and RoHS compliant

Applications

  • Connected LED lighting
  • Visible light communication
  • Indoor positioning
  • Multi-channel LED lighting

Resources

  • Datasheet
  • Product Overview
  • Package Outline

Block Diagram

Block Diagram - onsemi NCL31010 PoE Interface LED Driver

Typical Application Diagram

Application Circuit Diagram - onsemi NCL31010 PoE Interface LED Driver

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onsemi NCL31010 PoE Interface LED Driver