iW3638

iW3638

Second-Stage Buck LED Driver with Exceptional Deep Dimming Performance for Commercial Lighting Applications

A team of engineers is ready to answer your questions

Deep Dimming with Virtually No Flicker Even Down to 1%

The iW3638 second-stage buck LED driver provides constant current to LEDs directly from DC power supplies. It supports a non-isolated buck converter topology to post-regulate from an off-line AC/DC converter, minimizing low frequency output ripple current and eliminating virtually all flicker in the system, even down to 1%.

A wide range of DC input voltages simplifies design by enabling the use of just one second-stage driver across any commercial lighting product portfolio.

Features

  • Single-Stage DC/DC Buck
  • Supports Wide DC Input Voltage with Tight Output Current Regulation (±3%)
  • Output Power up to 90W
  • PrimAccurate™ Primary-Side Control for Excellent Output Current Regulation with No Direct Voltage and Current Feedback Components Needed
  • Independent Maximum Load Current Setting Interface
  • PWM Dimming
  • Supports 0-10V Dimming with iW339 Dimming Interface
  • Wide Dimming Range: 1% - 100%, with 1% Resolution
  • Configurable Minimum Dimming Setting
    • Dim-to-Off, 1%, 5%, or 10%

Features

  • Fully Protected
    • Output Over-Voltage, Output Open, Output Short, Over-Current, Peak Current Limit, Sense-Resistor Short Protections
    • Input Voltage Under-Voltage Protection
    • Built-In Over-Temperature Protection or External NTC
    • Brown-In and Brown-Out Protection
  • Small SOIC 8-Lead Package

Applications

  • Commercial Lighting:
    • T8
    • 0-10V Dimming
    • External Fixture Drivers
    • Wireless and Intelligent LED Lighting Systems

Block Diagrams

Functional Block Diagram
,
Typical Applications Diagram

Resources

Product Briefs and Summaries

For technical support or information on how to buy, contact us directly.

Request Samples Contact Us Register for newsletter

Need technical help?

Visit our support web site to:

  • Get help from Dialog experts online.
  • Search the forums.
  • Access software, drivers, tools & utilities.