Texas Instruments

LM3414/LM3414HV Buck LED Driver

Texas Instruments" 1A 60 W common anode capable constant current buck LED driver requires no external current sensing resistor

image of Texas Instruments' LM3414 LM3414HV Buck LED DriverTexas Instruments' LM3414 and LM3414HV are 1 A 60 W* common anode capable constant current buck LED drivers. They are exceptionally suitable to drive single string of 3 W HBLED with up to 96% efficiency. They accept input voltages from 4.5 VDC to 65 VDC and deliver up to 1 A average LED current with ±3% accuracy. The integrated low-side N-channel power MOSFET and current sensing element realizes simple and low component count circuitry, as no bootstrapping capacitors and external current sensing resistors are required. An external small-signal resistor to ground provides very fine LED current adjustment--analog dimming as well as thermal fold-back functions. Constant switching frequency operation eases EMI. No external loop compensation network is needed.

Features
  • Support LED power up to 60 W: 18 x 3 W HBLEDs
  • Requires no external current sensing resistor
  • ±3% LED current accuracy
  • Up to 96% efficiency
  • High contrast ratio
    (minimum dimming current pulse width <10 µS)
  • Integrated low-side N-channel MOSFET
  • Adjustable constant LED current from 350 mA to 1000 mA
  • Support analog dimming and thermal fold-back
  • Wide input voltage range:
    • 4.5 V to 42 V (LM3414)
    • 4.5 V to 65 V (LM3414HV)
  • Constant switching frequency adjustable from 250 kHz to 1000 kHz
  • Thermal shutdown protection
  • Power enhanced ePSOP-8 or 3 mm x 3 mm LLP-8 package
Applications
  • High power LED driver
    Architectural lighting, office troffer
  • Automotive lighting
  • MR-16 LED lamp

Buck LED Driver

ImageManufacturer Part NumberDescriptionInternal Switch(s)Number of OutputsAvailable QuantityPrice
IC LED DRV RGLTR PWM 8SOPWRPADLM3414MR/NOPBIC LED DRV RGLTR PWM 8SOPWRPADYes11269 - Immediate$3.18View Details
IC LED DRV RGLTR PWM 8SOPWRPADLM3414HVMR/NOPBIC LED DRV RGLTR PWM 8SOPWRPADYes11722 - Immediate$3.51View Details
IC LED DRIVER RGLTR PWM 1A 8WSONLM3414SD/NOPBIC LED DRIVER RGLTR PWM 1A 8WSONYes13865 - Immediate$3.18View Details
IC LED DRIVER RGLTR PWM 1A 8WSONLM3414HVSD/NOPBIC LED DRIVER RGLTR PWM 1A 8WSONYes11000 - Immediate$3.51View Details
Published: 2011-01-24

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