概要

The iW1697 is a high-performance AC/DC controller designed to drive an external power bipolar junction transistor (BJT) for peak current mode PWM flyback power supplies. Ideal for wall adapters in portable electronics and power supplies for consumer electronics, the iW1697 easily meets the Energy Star® specification for AC/DC single-output power supplies (Rev. 2.0) with no-load power consumption less than 20mW.

As a PrimAccurate™ controller, which uses primary-side control algorithms, the iW1697 does not need any direct secondary-side feedback components, eliminating the need for opto-isolators, reducing component count and solution cost. Additional features include Renesas' proprietary EZ-EMI™ technology, quasi-resonant control for optimal efficiency at heavy loads, cable and connector voltage drop compensation options, full protection from fault conditions, and tiny packaging. The iW1697 comes in three options, the iW1697-01 with a 300mV voltage drop compensation offset, the iW1697-03 with a 450mV voltage drop compensation offset, and the iW1697-05 with 150mV of offset compensation.

iW1697 Functional Block Diagram
iW1697 Typical Applications Diagram
iW1697 Functional Block Diagram
iW1697 Typical Applications Diagram
  • Intrinsically low noise solution - No audible noise over entire operating range
  • Easily meets Energy Star® AC/DC power supply efficiency specs (Rev. 2.0)
    • Less than 20mW no-load power consumption
  • Low 1.5µA start-up current
  • Active start-up circuit to reduce turn-on time
  • 40kHz PWM switching frequency
  • Voltage offset compensation for voltage loss in cables and connectors (3 options)
  • PrimAccurate™ - Primary-side control, no optocoupler needed
  • Quasi-resonant control for optimal efficiency
  • EZ-EMI™ design to easily meet global EMI specifications
  • Fast dynamic load regulation
  • Fully protected from fault conditions
    • Over-temperature protection
    • Output overvoltage and overcurrent
    • Input undervoltage protection
    • Sense-resistor short circuit protection

アプリケーション

  • Power adapters for portable electronics
  • Consumer electronics power supplies
  • Linear AC/DC power supply replacement

ドキュメント

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分類 タイトル 日時
データシート
iW1697 Datasheet
PDF 943 KB
ホワイトペーパー
What is Digital Power White Paper
PDF 597 KB
2件

設計・開発

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Diagram of ECAD Models

製品選択

    Processing table
    Pkg. Type
    Carrier Type
    ご購入 / サンプル
    型名
    iW1697-01
    circleアクティブ
    memory
    view_in_ar
    		SOT23-6L
    iW1697-05
    circleアクティブ
    memory
    view_in_ar
    		SOT23-6L
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