Configurable Light Load Operation Mode AC/DC Converter Enables Highly Efficient 30W Travel Adapters with Fast DLR

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< 30mW No-Load Power Using Adaptive Voltage Positioning Control IC (iW676)

The iW1602 is a digital offline AC/DC controller for up to 30W output travel adapters. It uses Dialog’s PrimAccurate™ primary-side control technology to eliminate the need for an optical isolation device on the secondary, reducing component count and cost. 

The iW1602 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 synchronous rectifier controller with integrated active voltage position (AVP) control can be used for faster DLR while keeping the no-load power consumption < 30mW.

The iW1602 integrates a full array of protection features, including Dialog’s SmartDefender™ advanced hiccup technology to protect against soft shorts in travel adapter cables and connectors. Learn more about SmartDefender smart hiccup technology here

A DiaSIM simulation model is available for the iW602. For more information and where to download, please visit the DiaSIM page.


  • 30W AC/DC Digital Controller
  • Configurable Light Load Mode Optimizes for Low No-Load Power Consumption and Fast DLR
    • < 30mW No-Load Power Consumption with Fast DLR (using the iW676-30 Secondary-Side Controller with Active Voltage Positioning)
    • < 75mW No-Load Power Consumption with Faster DLR without Secondary-Side AVP Controller
  • 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
    • Helps Address Soft-Shorts in Cables, Connectors without Latching Off
    • Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power During Short Circuit by at Least 50%
  • Full Protection Features
    • Output Short Circuit Protection
    • Output Over Voltage Protection
    • Output Over Current Protection
    • Over-Temperature Protection


  • Travel Adapters up to 30W

Model Available!

Block Diagrams

Typical applications diagram
Functional block diagram


Product Briefs and Summaries
Date Version
iW1602 Product Summary 12/02/2019 Rev. 1.8

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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