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


Document title Document type Type Date Date
PDF 460 KB Product Brief
PDF 3.11 MB Datasheet
ZIP 2.11 MB Other
ZIP 3.04 MB Other
4 items

Design & Development