The iW1819 AccuSwitch™ digital PWM controller integrates a highly accurate control circuit with an 800V bipolar junction transistor (BJT) power switch to provide a complete solution for off-line power conversion at up to 18W of output power.

Renesas' PrimAccurate™ primary-side digital control algorithms eliminate the need for failure-prone optocouplers and ensure excellent cross-regulation accuracy, to enable the longer operating lifetime, high performance and reduced cost required for white goods applications.

The output is designed to smoothly start-up into large capacitors while maintaining a quick turn-on time. It operates in quasi-resonant mode to optimize efficiency and incorporates a low power mode that achieves <30mW of no-load power consumption to meet global energy efficiency regulations.


  • 18W Output
  • 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 (up to 6,000µF)
  • EZ-EMI™ Design
    • Reduces Filtering Requirements
    • Easily Meets Global EMI Specifications
  • Fully Protected from Fault Conditions
    • Built-In Over-Temperature Protection
    • Output Overvoltage and Overcurrent Protection
    • Sense-Resistor Short Circuit Protection
  • Thermally Efficient SO-10 Batwing Package



  • Networking Equipment
  • Set-Top Boxes
  • Home Appliances
  • Smart Meters


PDF 1.48 MB Datasheet
PDF 5.51 MB 日本語 Brochure
ZIP 2.24 MB Other
ZIP 1.85 MB Other
ZIP 2.27 MB Other
ZIP 3.52 MB Other
ZIP 3.43 MB Other
ZIP 2.21 MB Other
8 items

Design & Development