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


< 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.

A DiaSIM™ simulation model (32-bit NL5 version only) 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

DiaSIM logo

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.

Important note: Dialog's DiaSIM models are only compatible with the 32-bit version of NL5.


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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Important note: Dialog's DiaSIM models are only compatible with the 32-bit version of NL5.

Product Briefs and Summaries
Name Date Version
iW1602 Product Summary (482.37 KB) 26/06/2021 1.9
Name Date Version
iW1602 Datasheet (1.39 MB) (Registered users only) 26/06/2021 1.9
Application notes
Name Date Version
AN1203 - iW1602_iW1702 Design Guide (1.1 MB) (Registered users only) 27/04/2018 0.12
DiaSIM Simulation Tools
Name Date Version
iW1602 DiaSIM™ Model (207.32 KB) (Registered users only) 19/02/2018 1.0
iW1602 Simulation Circuit 90-264VAC 5V/2A 75mW Travel Adapter Design (529.37 KB) (Registered users only) 19/02/2018 3.0
NL5 Quick Start Guide (4.13 MB)
Reference designs
Name Date Version
Reference Design EBC10106: iW1602-00 and iW600-00 and iW673-00 5V/2A High Performance Charger Design (2.76 MB) (Registered users only) 17/06/2016 1.0
Reference Design EBC10107: iW1602-00 and iW600-00 and iW673-00 5V/3A Small Size Charger Design (2.9 MB) (Registered users only) 17/06/2016 1.0
Reference Design EBC10108: iW1602-00 5V/2A Low-Cost Charger Design (2.82 MB) (Registered users only) 17/06/2016 1.0