UCC3819AN Datasheet PDF - TI

●DESCRIPTION

●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)