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The iW1699B is recommended for new designs.


Selectable cable drop compensation

The iW1699 is a high performance AC/DC controller designed to drive an external power N-channel MOSFET for peak current mode PWM flyback power supplies. It uses Dialog’s PrimAccurate™ primary-side control technology, eliminating the need for a secondary-side regulator and optocoupler, reducing component count and solution cost while easily meeting the US DoE’s external power supply efficiency standard and the EU’s Code of Conduct, version 5, tier 2 external power supply standard, with no-load power consumption less than 30mW.

It integrates a constant current mode on some options so it can be used in adapter applications, with a constant current accuracy > 3%. Additional features include Dialog's proprietary EZ-EMI™ technology, adaptive multi-mode PWM/PFM control for optimal efficiency across all loads, 5 selectable cable and connector voltage drop compensation voltages, and robust operation with full protection from over-voltage and over-temperature.

For Lower Output Ripple See iW1699B

Lifecycle status



Meets DoE External Power Supply Regulation and EU CoC Version 5, Tier 2

  • Less than 30mW No-Load Power Consumption

Active Start-Up - Reduces Turn-on Time without Impacting No-load Power Consumption

Low 6µA Start-Up Current

Selectable Voltage Offset Compensation for Voltage Loss in Cables and Connectors (5 Options)

  • Selectable Via single resistor to ground

PrimAccurate™ - Primary-Side Control, No Opto-Coupler Needed

Intrinsically Low Noise Solution - No Audible Noise Over Entire Operating Range

Adaptive Multi-Mode PWM/PFM Control for Optimal Efficiency Across Load Range

EZ-EMI™ Design to Easily Meet Global EMI Specifications

Fast Dynamic Load Regulation

Fully Protected from Fault Conditions

  • Over-Voltage/Over-Temperature Protection (latch option)
  • Output Over-Voltage and Over-Current
  • Input Undervoltage Protection
  • Sense-Resistor Short Circuit Protection


Power Adapters for Portable Electronics

Consumer Electronics Power Supplies

Linear AC/DC Power Supply Replacement

Block Diagrams


Typical applications diagram


Functional block diagram

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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Product Briefs and Summaries
Name Date Version
iW1699 Product Summary (353.39 KB) 12/03/2018 Rev. 1.1
Name Date Version
iW1699 Datasheet (1.13 MB) (Registered users only) 12/03/2018 1.1
Reference designs
Name Date Version
Reference Design EBC10022: iW1699-03 5V/2A, 90-264VAC, 30mW No-Load Mini Travel Adapter Design (2.44 MB) (Registered users only) 11/01/2016 1.0
Reference Design EBC10024: iW1699-03 5V/2.4A, 90-264VAC, 30mW No-Load, High Efficiency Travel Adapter Design (3.19 MB) (Registered users only) 12/01/2016 1.0
Reference Design EBC10046: iW1699-03 5V/2.5A, 90-264VAC, 30mW No-Load, Low Cost Travel Adapter Design (2.59 MB) (Registered users only) 12/01/2016 1.0
Reference Design EBC10065: iW1699-05 and iW671-00, 5.2V/2.4A, 90-264VAC, 75mW No-Load, Low Output Ripple Travel Adapter Design (1.81 MB) (Registered users only) 12/02/2016 1.0
White Papers & Technical Articles
Name Date Version
What is Digital Power White Paper (597.24 KB)