UCC2818D Maximum Switching Frequency, Texas Instruments UCC2818D, Power Factor Pre-Regulator Circuit, 115 kHz, 17 V 16-Pin, SOIC

Power Factor Correction (PFC), Texas Instruments
Texas Instruments integrated controllers for Power Factor Correction (PFC) in pre-regulators and PFC converters can achieve near unity power factor and give stable, low distortion sinusoidal line currents. They utilise advanced features and innovative processes such as quantized voltage feed-forward, current synthesis, frequency dithering and slew rate enhancement to provide significant performance enhancements.
The Texas Instruments UCC2818 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.
Controls Boost Preregulators to Near-Unity Power FactorLimits Line DistortionWorld Wide Line OperationOver-Voltage ProtectionAccurate Power LimitingAverage Current Mode ControlImproved Noise ImmunityImproved Feed-Forward Line RegulationLeading Edge Modulation150-μA Typical Start-Up CurrentLow-Power BiCMOS OperationUp to 18-V OperationFrequency Range 6 kHz to 220 kHz
Power Factor Correction (PFC), Texas Instruments
Texas Instruments Power Factor Correction (PFC) controllers meet IEC61000-3-2 harmonic current limit standards. PFC controllers are designed for AC-DC applications and provide high Power Factor (PF), low current distortion (iTHD), high efficiency and high power density.