UCC3818APWR

BiCMOS功率因数前置稳压器 BiCMOS POWER FACTOR PREREGULATOR

DESCRIPON

The UCC3817A and the UCC3818A family 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

Limits Line Distortion

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

12-V to 17-V Operation