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PrimAccurate™ Off-Line Digital PWM Controller in a SOT-23 Package


< 30mW standby power

The iW1676 is a high performance AC/DC controller designed to drive a low-cost BJT power switch in peak current mode PWM flyback power supplies up to 5W. Ideal for power adapters for smartphones, the iW1676 integrates Dialog’s PrimAccurate™ digital primary-side control, eliminating the need for the secondary-side optocoupler, reducing component count and solution cost.

The iW1676 easily meets the US DoE’s external power supply standard and the EU’s Code of Conduct, version 5, tier 2 standard, with no-load power consumption less than 30mW.  Additional features include Dialog's proprietary EZ-EMI™ technology, quasi-resonant control for optimal efficiency at heavy loads, cable and connector voltage drop compensation options, full protection from fault conditions and tiny packaging.


Easily Meets DoE External Power Supply and EU Code of Conduct, Version 5, Tier 2 Standards

  • Less than 30mW No-Load Power Consumption

Low 1.7uA Start-Up Current

64kHz PWM Switching Frequency

Voltage Offset Compensation for Voltage Loss in Cables and Connectors (4 Options)

PrimAccurate™ - Primary-Side Control, No Optocoupler Needed

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

Quasi-resonant Control for Optimal Efficiency

EZ-EMI™ Design to Easily Meet Global EMI Specifications

Fast Dynamic Load Regulation

Tiny SOT-23-5 Package

Fully Protected from Fault Conditions

  • Over-Temperature Protection
  • 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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Name Date Version
iW1676 Datasheet (904.72 KB) 12/02/2020 1.7
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What is Digital Power White Paper (597.24 KB)