iW1676

iW1676

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

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< 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.

Features

  • 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

Features

  • 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

Applications

  • Power Adapters for Portable Electronics
  • Consumer Electronics Power Supplies
  • Linear AC/DC Power Supply Replacement

Block Diagrams

Typical Applications Diagram
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Functional Block Diagram

Resources

Datasheets

White Papers & Technical Articles

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