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Home » NEWEST Products » New by Manufacturer » Texas Instruments » LM3463 Dynamic Headroom Controller - TI
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Texas Instruments LM3463 Dynamic Headroom Controller

TI LM3463 Dynamic Headroom Controller

Texas Instruments LM3463 Dynamic Headroom Controller is a six-channel linear LED driver with Dynamic Headroom Control (DHC) interface that is specialized for high power LED lighting applications. TI LM3463 delivers accurately regulated current to LEDs while maximizing the system efficiency. The variation of the output current of every output channel in the temperature range of -40°C to 125°C is well controlled to less than ±1%. The output current of every channel is accurately matched to each other with less than ±1% difference. By interfacing TI LM3463 Dynamic Headroom Controller to the output voltage feedback node of a switching power supply via the DHC interface, the system efficiency is optimized automatically. The dynamic headroom control circuit in the LM3463 minimizes power dissipation on the external MOSFETs by adjusting the output voltage of the primary switching power supply according to the changing forward voltage of the LEDs. The dimming control interface of the LM3463 accepts both analog and PWM dimming control signals.

Features
  • Dynamic Headroom Control output to maximize efficiency
  • 6-channel current regulated LED driver
  • High precision analog dimming control interface
  • 4 individual PWM dimming control input
  • Dimming control via digital data bus
  • Built-in maximum MOSFET power limiting mechanism
  • Allows cascade operation to extend the output channels
  • Fault indicator output
  • Thermal shutdown
  • UVLO with hysteresis
Key Specifications
  • Wide supply voltage range (12V-95V)
  • Thermal fold-back dimming control
  • DHC regulates the lowest MOSFET drain voltage to 1V

Applications
  • Streetlights
  • Solid State Lighting Solutions
 

Functional Diagram

Functional Diagram
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  • Texas Instruments