UCC3819ANG4

可编程输出功率因数预调节器 PROGRAMMABLE OUTPUT POWER FACTOR PREREGULATOR

DESCRIPON

The UCC2819A/UCC3819A provides all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac-input line current waveform to correspond to that of the ac-input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current.

FEATURES

  Controls Boost Preregulator to Near-Unity Power Factor

  World Wide Line Operation

  Over-Voltage Protection

  Accurate Power Limiting

  Average Current Mode Control

  Improved Noise Immunity

  Improved Feed-Forward Line Regulation

  Leading Edge Modulation

  150-µA Typical Start-Up Current

  Low-Power BiCMOS Operation

  10.8-V to 17-V Operation

  Programmable Output Voltage Tracking Boost Topology