iW337

iW337

3-in-1 Secondary-Side Signal Interface Controller

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Supports 0-10V Analog, PWM, Resistor Dimming

The iW337 is a secondary-side PWM signal generator that works with three types of dimming inputs: PWM dimming, 0-10V 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%–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.

Features

  • Operating Range:15V to 60V
  • 3-in-1 Dimmer Interface
    • 0-10V Analog
    • PWM (10V)
    • Resistor
  • Highly Integrated for Low BOM Cost
    • Integrated Current Source for Driving 0-10V Dimmers
    • Integrated Optocoupler Driver for Isolated Applications

Features

  • 1% to 100% PWM Output
    • 1% PWM Duty Cycle Tolerance
    • Selectable Frequency Range via External Capacitor
  • Shutdown Pin to Minimize Standby Power

Applications

  • 0-10V Analog or PWM LED Dimming
  • Resistor LED Dimming

Block Diagrams

iW337 Typical Applications Diagram
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iW337 Functional Block Diagram

Resources

Product Briefs and Summaries
Date Version
iW337 Product Summary 20/03/2018 Rev. 1.0

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