The iW1825 AccuSwitch™ digital PWM controller integrates a highly accurate control circuit with a 700V power MOSFET switch to provide a complete solution for off-line power conversion at up to 25W of output power.

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

The iW1825 has a configurable light load mode operation to enable optimization between no-load standby power and fast DLR. It can achieve <75mW at no load, with the fastest DLR setting and <30mW in the lowest setting. The iW676 synchronous rectifier controller with active voltage positioning can be used with the iW1825 to enable the lowest no-load standby power, fastest DLR and highest efficiency for 25W applications.


  • 25W Output
  • AccuSwitch™ Integrated 700V Power MOSFET
  • PrimAccurate™ Primary-Side Control
    • No Optocoupler Needed
  • Intelligent Digital Control Loop for Accurate Voltage Cross-Regulation
  • Meets Global Energy Efficiency Standards
  • Configurable Light Load Mode to Optimize No-Load Power Consumption and DLR
    • <30mW to <75mW No-Load Power Consumption
  • Works with the iW676 SR Controller with Active Voltage Positioning (AVP)
    • AVP – Enables <30mW No-Load Power Consumption and Fast DLR
  • 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




  • Home Appliances
  • Power Adapters
  • Networking Power Supplies


Type Title Date
Product Brief PDF 460 KB
Brochure PDF 8.73 MB
Brochure PDF 5.49 MB 日本語
Other Log in to Download ZIP 2.11 MB
Datasheet Log in to Download PDF 3.11 MB
Other Log in to Download ZIP 3.04 MB
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