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

A team of engineers is ready to answer your questions

Supports 0-10V Analog, PWM, Resistor Dimming

The iW350 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. With its extensive configurability, the iW350 offers programmable maximum dimming voltage, minimum duty cycle, turn-off function and PWM output frequency range, making the device highly flexible for dimmable commercial SSL lighting applications.

The iW350 converts any of the compatible dimming 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
  • Programmable Maximum Dimming Voltage
  • Programmable Minimum Duty Cycle and Turn-off
  • Programmable PWM Frequency Output
  • 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
  • Output Drive Optimized for Optocoupler Non-Linear Delay Time
  • 1% PWM Duty Cycle Tolerance
  • Shutdown Pin to Minimize Standby Power


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

Block Diagrams

Typical applications diagram
Functional block diagram


Product Briefs and Summaries
Date Version
iW350 Product Summary 02/03/2020 Rev. 0.4

For technical support or information on how to buy, contact us directly.

Request Samples Contact Us Register for newsletter

Need technical help?

Visit our support web site to:

  • Get help from Dialog experts online.
  • Search the forums.
  • Access software, drivers, tools & utilities.