Power Factor Controllers | FAN7529

CrCM PFC 控制器

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概览

FAN7529 是一款有源功率因数校正 (PFC) 控制器，用于在临界导通模式 (CRM) 模式下运行的升压 PFC 应用。它使用电压模式 PWM，将内部斜坡信号与误差放大器输出进行比较，产生 MOSFET 关断信号。因为电压模式 CRM PFC 控制器不需要整流后的交流线路电压信息，所以节省了电流模式 CRM PFC 控制器所需的输入电压感应网络的功率损耗。FAN7529 提供了很多保护功能，如过电压保护、开路反馈保护、过电流保护和欠电压锁闭保护。如果 INV 引脚电压低于 0.45V，运行电流降至 65µA，FAN7529 则可以禁用。通过使用新型的可变导通时间控制方法，THD 低于传统的 CRM 升压 PFC 集成电路。

  • 低总谐波失真 (THD)
  • 精调输出过压保护
  • 反馈开路保护和禁用功能
  • 零电流检测器
  • 150 µs 内部启动定时器
  • MOSFET 过流保护
  • 带 3.5 V 滞回的欠压锁定
  • 低启动电流 (40µA) 和工作电流 (1.5mA)
  • 带有高态箝位的图腾柱输出
  • +500/-800mA 峰值门驱动电流
  • 8 引脚 DIP 或 8 引脚 SOP

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