45W Digital AC/DC PWM Controller with Configurable Light Load Operation Mode Optimized for 9V+ Applications

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< 75mW No-Load Power with Fast DLR

The iW1702 is a digital offline controller for AC/DC power supplies up to 45W optimized for 9V or greater output voltages. The part uses Dialog’s PrimAccurate™ primary-side control technology, eliminating the need for an optical isolation device on the secondary, reducing component count and cost.

For highest power density power supplies, the iW1702 can be paired with Dialog’s iW676 digital synchronous rectifier controller, which drives a power MOSFET on the secondary of the power supply to replace the main rectifying diode.

The iW1702 integrates a unique light load operation mode that allows the user to configure the minimum switching frequency at light load through an external resistor.  The higher the light load mode switching frequency, the better the dynamic load response (DLR).  If the lowest switching frequency is chosen, the no-load power consumption is reduced, negatively impacting the DLR performance. In this case, the iW676 offers integrated active voltage position (AVP) control options that can be used for faster DLR while keeping the no-load power consumption < 75mW.

A full array of protection features are integrated, including SmartDefender™ advanced hiccup technology to protect against soft shorts in cables and connectors.  Learn more about SmartDefender smart hiccup technology here.

A DiaSIM™ simulation model is available for the iW1702. For more information and where to download, please visit the DiaSIM page.


  • 45W Maximum Output Power
  • iW1702-0X/3X Options:
    • External Supplemental Output Over-Voltage Protection, Optimized for 9V+ Output Voltages
  • iW1702-1X Options:
    • External Input Over-Voltage Protection, Supports 5V+ Output Voltages
  • Programmable Light Load Mode to Optimize No-Load Power Consumption and DLR
    • < 75mW No-Load Power Consumption


  • Compliant with DoE Level VI and EU’s CoC, Version 5, Tier 2 External Power Supply Standards
  • PrimAccurate Primary-Side Regulation Technology
    • Eliminates the Need for Optocoupler
  • SmartDefender Advanced Hiccup Technology
    • Protects from Soft Shorts In Cables and Connectors
  • Additional Protection Features
    • Output Short Circuit Protection
    • Output Over Current Protection
    • Over Temperature Protection


  • Universal Input Power Supplies up to 45W
  • Network Devices up to 45W

Module Available!

Block Diagrams

Typical Application Diagram
Functional Block Diagram


Product Briefs and Summaries
Date Version
iW1702 Product Summary 24/10/2017 Rev. 1.4
White Papers & Technical Articles
Date Version
International External Power Supply Regulations Whitepaper

Dialog’s DiaSIM simulation models and tools enable simulation and validation of AC/DC power supplies using highly accurate models for selected products. All models and application circuits are available for download from the support website.


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

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