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3-in-1 Secondary-Side Signal Interface Controller with Optimized Output Drive


Supports 0-10V Analog, PWM, Resistor Dimming

The iW339 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 iW339 converts any of these three signals into a 1%–100% PWM duty cycle output that provides a dimming signal to a primary-side LED driver such as the iW3636, eliminating the need for transformers or other driver circuitry.


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

1% PWM Duty Cycle Tolerance

Selectable Frequency Range via External Capacitor

Shutdown Pin to Minimize Standby Power


0-10V Analog Dimming

PWM LED Dimming

Resistor LED Dimming

Block Diagrams


Typical Applications Diagram


Functional Block Diagram

To order a sample of any of our products, please complete the following form. We will provide up to five parts free of charge. Our sales department will provide pricing for samples orders exceeding five parts.

Sample Request Form

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