Offline Controllers | MC44604

反激 PWM 电压模式控制器

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MC44604 是一款增强型高性能控制器，适用于离线和 DC-DC 转换器应用。其高电流图腾柱输出适用于驱动功率 MOSFET。MC44604 是 MC44603A 的发展版本。与 MC44603A 类似，MC44604 适合基于 80 V 至 280 V 的通用交流主电源电压运行。它还具有多种保护特性（折回、过电压检测、软启动、准确去磁检测），提供增强型安全和可靠的功率管理。另外，MC44604 提供了一种新型高效方式，通过所谓的转换器脉冲模式待机运行来降低待机运行功耗，从而明显降低待机模式下的转换器功耗。

  • 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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