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reference designLM3444

Texas Instruments LM3444

AC-DC Offline LED Driver

Overview

TopologyFlyback Converter
Input voltage90-135 V
Output 130 V / 0.35 A
IC revisionC

Description

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC under-voltagelockout. The LM3444 is available in a low profile 10- pin VSSOP package or an 8-lead SOIC package.

Features

  • Application Voltage Range 80VAC – 277VAC
  • Capable of Controlling LED Currents Greater than 1A
  • Adjustable Switching Frequency
  • Low Quiescent Current
  • Adaptive Programmable Off-time Allows for Constant Ripple Current
  • Thermal Shutdown
  • No 120Hz Flicker
  • Low Profile 10-Pin VSSOP Package or 8-Lead SOIC Package
  • Patent Pending Drive Architecture

Remarks:

L1=L2=3.9mh is used as input signal

Typical applications

  • Solid State Lighting
  • Industrial and Commercial Lighting
  • Residential Lighting

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750311553
SPECTransformer
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Transformer
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