Offline Controllers | MC44604

フライバック PWM 電圧モード・コントローラ

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MC44604 は機能強化された高性能コントローラで、オフライン/DC-DC コンバータなどのアプリケーション専用として設計されています。その高電流トーテムポール出力はパワー MOSFET の駆動に最適です。MC44604 は MC44603A の進化型です。MC44603A のように、MC44604 は 80 V から 280 V の広範な AC メイン電圧で動作するように最適化されています。保護機能 (フォールドバック、過電圧検出、ソフトスタート、高精度減磁検出) のおかげで、安全面が強化され、電力管理の面も信頼できます。さらに、MC44604 は新しい効率的な方法を提供しています。コンバータのいわゆるパルス・モード・スタンバイ動作により、スタンバイ動作電力を削減し、スタンバイ・モードでのコンバータの消費量を大幅に抑えています。

  • Operation Up to 250 kHz Output Switching Frequency
  • Inherent Feed Forward Compensation
  • Latching PWM for Cycle-by-Cycle Current Limiting
  • Oscillator with Precise Frequency Control High Flexibility
  • Externally Programmable Reference Current
  • Secondary or Primary Sensing
  • High Current Totem Pole Output
  • Undervoltage Lockout with Hysteresis Safety/Protection Features
  • Overvoltage Protection Facility Against Open Loop
  • Protection Against Short Circuit on Oscillator Pin
  • Fully Programmable Foldback
  • Soft-Start Feature
  • Accurate Maximum Duty Cycle Setting
  • Demagnetization (Zero Current Detection) Protection
  • Internally Trimmed Reference
  • Low Startup and Operating Current
  • Pulsed Mode Standby for Low Standby Losses
  • Low dV/dT for Low EMI
  • Pb-Free Package is Available

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