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350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs

Availability: 4,794


Package | PIN: HVSSOP (DGN) | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $0.92
10-24 $0.82
25-99 $0.76
100-249 $0.66
250-499 $0.61
500-749 $0.51
750-999 $0.42
1000+ $0.39


  • 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
  • No External Control Loop Compensation Required
  • Supports Ceramic and Low ESR Output Capacitors
  • Input Undervoltage Lockout (UVLO)
  • Thermal Shutdown Protection
  • MSOP-8 PowerPAD Package

Texas Instruments  LM3407MY/NOPB

The LM3407 device 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-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter 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. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.