Overview

The iW337 is a secondary-side PWM signal generator that works with three types of dimming inputs: PWM dimming, 0V to 10V linear dimming, or simple dimming using a single resistor to ground from the DIM pin. The iW337 converts any of these three signals into a 1% to 100% PWM duty cycle that provides a dimming signal to a primary-side LED driver such as the iW3631, eliminating the need for transformers or other driver circuitry.

iW337 Functional Block Diagram
iW337 Typical Applications Diagram
iW337 Functional Block Diagram
iW337 Typical Applications Diagram
  • Operating range:15V to 60V
  • 3-in-1 dimmer interface
    • 0V to 10V analog
    • PWM (10V)
    • Resistor
  • Highly integrated for low BOM cost
    • Integrated current source for driving 0V to 10V dimmers
    • Integrated optocoupler driver for isolated applications
  • 1% to 100% PWM output
    • 1% PWM duty cycle tolerance
    • Selectable frequency range via external capacitor
  • Shutdown pin to minimize standby power

Applications

  • 0V to 10V analog or PWM LED dimming
  • Resistor LED dimming

Documentation

= Featured Documentation
Type Title Date
Datasheet
iW337 Datasheet
Log in to Download PDF 648 KB
Product Brief
iW337 Product Summary
PDF 427 KB
Application Note
Application Note 2101 - 0-10V Analog Dimming
Log in to Download PDF 590 KB
Other
Reference Design EBC20052: iW3637-01 and iW337-30, 300V-400VDC Input, 120V/500mA Output, 0-10V Dimmable High Voltage Buck SSL Design
Log in to Download ZIP 4.11 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
    IW337-00
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    		SOIC-8 Tape & Reel 1
    IW337-30
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    		SOIC-8 Tape & Reel 1
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