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iW1821 1200V 12W

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产品概述

iW1821

1200V AccuSwitch™ AC/DC Digital Primary-Side Converter for Three-Phase Industrial Applications up to 12W

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    Excellent Cross Regulation and No Optocoupler Needed Optimizes System Cost

    The iW1821 AccuSwitch™ digital PWM controller integrates a highly accurate control circuit with a 1200V BJT power switch to provide a complete solution for off-line power conversion at up to 12W of output power.

    Dialog’s PrimAccurate™ primary-side digital control algorithms eliminate the need for failure-prone optocouplers and ensures excellent cross-regulation accuracy, to enable the longer operating lifetime, high performance and reduced cost required for industrial applications and appliances.

    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.

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    Features

    • 12W Output

    • AccuSwitch™ Integrated 1200V 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 (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 Over-Voltage and Over-Current Protection

      • Sense-Resistor Short Circuit Protection

      • Thermally Efficient SO-10 Batwing Package

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    Applications

    • Three-Phase Smart Electricity Meters

    • Industrial Applications

    Block Diagrams

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    Typical Applications Diagram

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    Functional Block Diagram

    Product Briefs and Summaries

    Date Version
    iW1821 Product Summary 17/06/2020 Rev. 0.3