Overview

The iW1676 is a high-performance AC/DC controller designed to drive a low-cost bipolar junction transistor (BJT) power switch in peak current mode PWM flyback power supplies up to 5W. Ideal for power adapters for smartphones, the iW1676 integrates Renesas' PrimAccurate™ digital primary-side control, eliminating the need for the secondary-side optocoupler, and 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 a no-load power consumption of less than 30mW. Additional features include Renesas' 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.

iW1676 Functional Block Diagram
iW1676 Typical Applications Diagram
iW1676 Functional Block Diagram
iW1676 Typical Applications Diagram
  • Easily meets DoE external power supply and EU Code of Conduct, Version 5, Tier 2 standards
    • Less than 30mW no-load power consumption
  • Low 1.7µA 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 the 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 overvoltage and overcurrent
    • Input undervoltage protection
    • Sense-resistor short circuit protection

Applications

  • Power adapters for portable electronics
  • Consumer electronics power supplies
  • Linear AC/DC power supply replacement

Documentation

= Featured Documentation
Type Title Date
Datasheet
iW1676 Datasheet
PDF 974 KB
White Paper
What is Digital Power White Paper
PDF 597 KB
2 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
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    Part Number
    iW1676-01
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    Samples Available
    		 SOT23-5L Tape & Reel 1 Get Samples,
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