UCC2817A - Texas Instruments

UCC2817A BiCMOS Power Factor Preregulator

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. Desi.

Features

•1 Controls Boost Preregulator to Near-Unity Power Factor
• Limits Line Distortion
• World Wide Line Operation
• Overvoltage 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
• Frequency Range of 6 kHz to 220 kHz 2 Applications
• PC Power
• Consumer Electronics
• Lighting
• Industrial Power Supplies
• IEC6100-3-2 Compliant Supplies Less Than 300 W 3 Description The UCC3817A and the UCC3818A family .