Overview

The iW388 high-resolution integrated buck LED driver with Dialog’s True DC dimming technology enables high performance dimmable commercial lighting systems. The device works from a 65V input voltage as a second-stage converter in an AC/DC lighting system or as a stand-alone DC/DC converter. With an integrated 65V power MOSFET, the device offers a simple-to-use IC for applications up to 40W of output power. The iW388 accepts both analog (DC) or PWM dimming inputs to provide an exceptional dimming range from 0.0625% to 100% in 0.0625% steps with an integrated light-off mode. The device also works with a resistor set dimming input to offer a true 3-in-1 dimmer compatibility.

The iW388 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%.

iW388 Functional Block Diagram
iW388 Typical Applications Diagram
iW388 Functional Block Diagram
iW388 Typical Applications Diagram
  • Single-Stage DC/DC Non-Isolated Buck Regulator with Integrated Power MOSFET
  • Supports Wide DC Input Voltage with Tight Output Current Regulation (±3%)
  • Output Power up to 40W
  • Wide Output Voltage Range Support – 5V to 98% of the Input Voltage
  • High Performance Dimming
    • 0.0625% Dimming Resolution
    • 0.0625% to 100% Dimming Range
    • True DC Dimming with No Ripple Across Entire Dimming Range
    • Light-Off Mode - Completely Turn-Off LED Light at Minimum Dimming Input
  • Two DIM Pins – Supports PWM/Analog Inputs and RSET Input
    • RSET + 0-10V
    • MCU (DALI or Wireless) + 0-10V
  • Supports Constant Current (CC), Constant Voltage (CV), Constant Power (CP) Operating Modes
  • Fully Protected
    • Output Over-Voltage, Output Short, Over-Current, Peak Current Limit, Sense-Resistor Short Protection
    • Input Voltage Under-Voltage and Over-Voltage Protection
    • Built-In Over-Temperature Protection
  • Thermally Efficient SO-10 Batwing Package

Applications

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

Documentation

= Featured Documentation
Type Title Date
Product Brief
iW388 Product Summary
PDF 394 KB
Datasheet
iW388 Datasheet
Log in to Download PDF 1.13 MB
Brochure
Power Products Brochure
PDF 8.73 MB
Other
Reference Design EBC20078: iW388-00, 40V/1A, External SSL Driver Design
Log in to Download ZIP 1.63 MB
4 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Buy / Sample
    Part Number
    iW388-00
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    IW388-00B
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    iW388-01
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    IW388-01B
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    IW388-20B
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    iW388-31B
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    iW388-30B
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