The iW330 is a secondary-side PWM signal generator that works with three types of dimming inputs: 0V to 5V and 0V to 10V PWM dimming, 0V to 5V and 0V to 10V linear dimming, or simple dimming using a single resistor to ground from the DIM pin. The iW330 converts any of these three signals into a 5% to 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
    • 0-5V/0-10V analog
    • 0-5V/0-10V PWM
    • Single resistor
  • Highly integrated for low BOM cost
    • Integrated current source for driving 0V to 5V or 0V to 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




  • 0V to 5V analog and PWM LED dimming
  • 0V to 10V analog and PWM dimming
  • Resistor LED dimming


Type Title Date
Product Brief PDF 463 KB
Datasheet Log in to Download PDF 861 KB
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Design & Development