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LM3445 Description

The LM3445 is an adaptive constant off-time AC/DC buck (step-down) constant current controller designed to be patible with TRIAC dimmers. The LM3445 provides a constant current for illuminating high power LEDs and includes a TRIAC dim decoder. The dim decoder allows wide range LED dimming using standard TRIAC dimmers.

LM3445 Key Features

  • 1 TRIAC Dim Decoder Circuit for LED Dimming
  • Application Voltage Range 80 VAC to 277 VAC
  • Capable of Controlling LED Currents Greater
  • Adjustable Switching Frequency
  • Low Quiescent Current
  • Thermal Shutdown
  • No 120-Hz Flicker
  • Low Profile 10-Pin VSSOP Package or 14-Pin
  • Patented Drive Architecture