Overview

Description

The iW1818 AccuSwitch™ digital PWM converter 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 12W 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 <50mW of no-load power consumption to meet global energy efficiency regulations. Additional features include full protection from over-temperature, overvoltage and overcurrent conditions as well as EZ-EMI® technology to easily meet global EMI specifications.

A DiaSIM™ simulation model is available for the iW1818. For more information and where to download, please visit the DiaSIM page.

Features

  • 10W – 12W 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
    • <50mW No-Load Power Consumption
    • Quasi-resonant Control for Optimal Efficiency
  • Adaptively Controlled Soft Start-up
    • Fast, Smooth Start-up Into Large Capacitive Loads
  • EZ-EMI™ Design to Easily Meet Global EMI Specifications
  • Fully Protected from Fault Conditions:
    • Over-Temperature Protection
    • Output Overvoltage and Overcurrent
    • Sense-Resistor Short Circuit Protection Application
  • Thermally Efficient PDIP-7 Package to Support High Power

Applications

Applications

Documentation

Design & Development

Software & Tools

Software & Tools

Title Type Company
DiaSIM™ Simulation ModelsDiaSIM simulation models let the user test and validate AC/DC power supply designs prior to prototying.Downloads: Simulator Renesas

Models

Models

Title Type Date
Model - Other