Offline Controllers | MC44605

反激 PWM 电流模式控制器

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概览

MC44605 是一款用于离线转换器的高性能电流模式控制器。MC44605 具有若干很突出的特性，使其尤其适用于多个同步显示器应用。MC44605 同步安排可实现从 16 kHz 直至 130 kHz 的运行。此产品适合在 80 V 到 280 V 的通用交流主电源电压下运行，其高电流图腾柱输出使其适用于驱动功率 MOSFET。MC44605 保护提供控制良好的安全功率管理。安全增强功能会检测四种不同的故障情况，通过禁用锁存来提供保护。电流或电压模式控制器

  • Current Mode 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
  • Externally Programmable Reference Current
  • Secondary or Primary Sensing (Availability of Error Amplifier Output)
  • Synchronization Facility
  • High Current Totem Pole Output
  • VCCUndervoltage Lockout with Hysteresis
  • Low Output dV/dT for Low EMI
  • Low Startup and Operating Current Safety/Protection Features
  • Soft-Start Feature
  • Demagnetization (Zero Current Detection) Protection
  • Overvoltage Protection Facility Against Open Loop
  • EHT Overvoltage Protection (E.H.T.OVP): Protection Against Excessive Amplitude Synchronization Pulses
  • Winding Short Circuit Detection (W.S.C.D.)
  • Limitation of the Maximum Input Power (M.P.L.): Calculation of Input Power for Overload Protection
  • Over Heating Detection (O.H.D.): to Prevent the Power Switch from Excessive Heating Latched Disabling Mode
  • When one of the following faults is detected: EHT overvoltage, Winding Short Circuit (WSCD), excessive input power (M.P.L.), power switch over heating (O.H.D.), a counter is activated
  • If the counter is activated for a time that is long enough, the circuit gets definitively disabled. The latch can only be reset by removing and then re-applying power GreenLine is a trademark of Motorola, Inc. This document contains information on a prod
  • Pb-Free Package is Available

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