National Semiconductor Supplier Page

LM3407 LED Driver


LM3407 - PowerWise® 350mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs at Digi-Key


The LM3407 from National Semiconductor is a constant current output buck switching converter with integrated power N-MOSFET that is designed to provide constant current to high power LEDs. An innovative Pulse Level Modulation (PLM) technique allows the LM3407 to deliver a constant current with 10% accuracy to a serially-connected LED string of varying number and type. The LM3407 also features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). An exposed pad eMSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution. LM3407 LED Driver

Features and Benefits Applications
  •  Wide input operating range 4.5V to 30V
  •  Output voltage range: 0.1Vin to 0.9Vin
  •  Accurate constant current output ±10% over temperature
  •  Independent device enable (CMOS compatible) and PWM      dimming control
  •  Converter switching frequency adjustable from 300kHz to      1MHz(switching frequency is resistor programmable)
  •  No external control loop compensation required
  •  Supports ceramic and low ESR output capacitors
  •  Cycle-by-cycle current limiting
  •  Input Under-Voltage Lock Out (UVLO)
  •  Thermal shutdown protection
  •  eMSOP-8 Package
  •  LED driver
  •  Constant current source
  •  Automotive lighting
  •  General illumination
  •  Industrial lighting

National Semiconductor Part Number Digi-Key Part Number Packaging  
LM3407MY/NOPB LM3407MYTR-ND Tape/Reel Datasheet
LM3407MYCT-ND Cut Tape
LM3407MYDKR-ND Digi-Reel®

National Semiconductor Part Number Digi-Key Part Number Description
LM3407EVAL LM3407EVAL-ND Evaluation Kit

Please visit Digi-Key's Lighting Solutions Technology Zone to learn more about National Semiconductor lighting products.