AccuSwitch™ Off-Line Digital PWM Converter with 800V Bipolar Power Transistor in Thermally Efficient P-DIP7

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64kHz integrated BJT optimized for 12Vout, 7W output

The iW1815 is an AccuSwitch™ digital PWM controller that simplifies design and lowers cost in power supplies.  The iW1815 integrates a highly accurate control circuit with an 800V-rated BJT power switch.  The output is optimized for a 12V output voltage at loads up to 7W and is designed to start up into large output capacitors (6,000µF).  It operates in a quasi-resonant mode to optimize efficiency and also incorporates a low-power mode that achieves <30mW no-load power consumption, easily meeting global energy efficiency standards, ideal for applications such as energy-standard compliant home appliances.

Dialog's PrimAccurate™ primary-side digital control algorithms enable a fully isolated solution without the need for an optocoupler, reducing cost and solution size while improving reliability. Additional functionality includes full protection from over-temperature, over-voltage and over-current conditions as well as EZ-EMI® technology to easily meet global EMI specifications.


  • 1W – 7W Output Power
  • AccuSwitch™ - Integrated 800V Power BJT
  • PrimAccurate™ Primary-Side Control
    • No Optocoupler Needed
  • Intelligent Digital Control Loop for Accurate Voltage Cross-Regulation
  • Meets Global Energy Efficiency Standards
    • < 30mW No-Load Power Consumption
    • Quasi-resonant Control for Optimal Efficiency


  • Adaptively Controlled Soft Start-up
    • Fast, Smooth Start-up Into Large Capacitive Loads
  • Optimized for 12VOUT and large COUT
  • EZ-EMI™ Design to Easily Meet Global EMI Specifications
  • Fully Protected from Fault Conditions:
    • Over-Temperature Protection
    • Output Over-Voltage and Over-Current
    • Sense-Resistor Short Circuit Protection
  • Thermally Efficient PDIP-7 Package to Support High Power


  • Smart Meters
  • Motor Control
  • Networking Devices
  • Home Automation and Appliances
  • Networking Devices
  • Industrial Appliances

Block Diagrams

Typical applications diagram
Functional block diagram


Product Briefs and Summaries
Date Version
iW1815 Product Summary 21/04/2015 Rev. 0.1

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