UCC2819A UCC3819A
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SLUS579 − OCTOBER, 2003
PROGRAMMABLE OUTPUT POWER FACTOR PREREGULATOR
FEATURES D Controls Boost Preregulator to Near-Unity
Power Factor
D World Wide Line Operation D Over-
Voltage Protection D Accurate Power Limiting D Average Current Mode Control D Improved Noise Immunity D Improved Feed-Forward Line Regulation D Leading Edge Modulation D 150-µA Typical Start-Up Current D Low-Power Bi
CMOS Operation D 10.
8-V to 17-V Operation D Programmable Output
Voltage (Tracking
Boost Topology)
BLOCK DIAGRAM
OVP/EN 10
DESCRIPTION
The UCC2819A/UCC3819A provides all the functions necessary for active power factor corrected preregulators.
The controller achieves near unity power factor b...