L4985

量産中
MySTに保存する

高電圧スタートアップ内蔵の連続モードPFCコントローラ

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概要

製品概要

概要

概要

L4985は、ブースト･コンバータ向けのピーク電流モードPFCコントローラです。革新的なTHDオプティマイザに加え、あらゆる動作条件下できわめて低い全高調波歪（THD）性能を保証する独自の乗算器「エミュレータ」を搭載しています。このデバイスは、SOパッケージで提供され、連続モード駆動ブーストPFCプレ･レギュレータ向けの高性能 / 低部品点数ソリューションを実現します。このプレ･レギュレータは、数百W～数kWの電力範囲のEN61000-3-2およびJEIDA-MITIに準拠したアプリケーションに対応しています。

このデバイスは、独自のオフタイム･モジュレータを活用し、あらゆる動作条件において、疑似固定周波数で機能します。65kHz（A）および130kHz（B）の2つのオプションが利用できます。

800V高電圧スタートアップ･ブロックには、EMIフィルタのXコンデンサを安全なレベルにまで放電するための回路も組み込まれています。これにより、従来の放電抵抗をXコンデンサと並列で使用しなくても、安全規格（IEC 61010-1やIEC 62368-1など）に準拠できるようになります。

このデバイスは、低消費電力とスイッチング動作停止機能を特徴とし、米国エネルギー省（DoE）のエネルギー･スター、欧州行動規範、EUのエコデザイン指令、およびその他のガイドラインが定める最新の省エネルギー要件に適合するアプリケーションでも使用できます。

過渡状況中に出力電圧の制御を維持できる過電圧保護機能に加え、ICには、フィードバック･ループ障害や誤設定、ブースト･インダクタ飽和に対する保護機能も組み込まれています。ブラウンアウト保護機能は、IEC 60601-1-2の最新の規格に従った医療機器の設計を実現します。この規格では、メイン電源の低下が最大500ミリ/秒継続した場合に、出力レギュレーションが要求されます。ソフトスタートがピーク電流を制限します。

0.7Aのソース電流と1.5Aのシンク電流に対応したトーテム･ポール出力段は、大型MOSFETやIGBTドライブに適しています。

  • 特徴

    • ピーク電流モード（連続モード駆動）
    • 入力電圧検知機能を内蔵した800V高電圧スタートアップ
    • アクティブ入力フィルタ･コンデンサ放電
    • あらゆる動作条件（CCMおよびDCM）下でライン電流の最小THDを実現する独自の乗算器「エミュレータ」
    • 非常に少ない外付け部品点数
    • 保護：フィードバックループ障害、OVP、OCP、インダクタ飽和、ブラウンイン、ブラウンアウト（医療用電源規格に準拠）
    • インダクタ電流センス
    • スイッチング動作停止機能および低消費電力機能
    • 突入電流モニタリング
    • ソフトスタートによるスムーズな起動
    • 1.2%（@ Tj = 25℃）内部リファレンス電圧
    • 65kHz（Aバージョン）および130kHz（Bバージョン）スイッチング周波数
    • SO-8パッケージ

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Signal Conditioning Design Tool

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Signal Conditioning Design Tool

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NFC/RFID Calculators

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太陽光発電システム

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
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Target: Product is in design feasibility stage.No commitment taken to produce
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NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
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(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMarketing description of the package type.Storage method used to contain product.Main country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.