LM3407 LED Driver



National Semiconductor's 350 mA, constant current output floating buck switching converter for high power LEDs

National Semiconductor LM3407 LED Driver National Semiconductor's LM3407 is a constant current output floating buck switching converter designed to provide constant current to high power LEDs. The device is ideal for automotive, industrial and general lighting applications. The LM3407 has an integrated power N-MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converters output voltage to adjust as needed to deliver constant current within 10% accuracy, to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low power shutdown.  LM3407 Datasheet

  Features   Applications
  • Input operating range 4.5 V to 30 V
  • Output voltage range: 0.1 VIN to 0.9 VIN
  • Accurate constant current output
  • Independent device enable (CMOS compatible) and PWM dimming control
  • Converter switching frequency adjustable from 300 kHz to 1 MHz
  • LED driver
  • Constant current source
  • Automotive lighting
  • General illumination
  • Industrial lighting

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Texas Instruments
Part Number
Digi-Key
Part Number
Packaging Voltage - Supply Package  
LM3407MY/NOPB LM3407MY/NOPBTR-ND Tape & Reel 4.5 V ~ 30 V 8-TSSOP, 8-MSOP
(0.118", 3.00 mm width)
Exposed Pad
LM3407 Datasheet
LM3407MY/NOPBCT-ND Cut Tape
LM3407MY/NOPBDKR-ND Digi-Reel®

Evaluation Board
National Semiconductor
Part Number
Digi-Key
Part Number
Description  
LM3407EVAL LM3407EVAL-ND Evaluation board for LM3407 LM3407EVAL User's Guide