Texas Instruments UCC3817 BiCMOS Power Factor Preregulator UCC3817DWTRG4

The UCC3817 BiCMOS Power Factor Preregulator from Texas Instruments is designed to control boost preregulators to achieve near-unity power factor, effectively limiting line distortion. It operates with a wide input voltage range of up to 18 V and supports a frequency range from 6 kHz to 220 kHz. The device features over-voltage protection, accurate power limiting, and average current mode control, which enhances noise immunity and feed-forward line regulation. With a typical start-up current of 150 OºA, it is suitable for applications in PC power supplies, consumer electronics, lighting, and industrial power supplies, particularly for systems compliant with IEC6100-3-2 for less than 300 W. The UCC3817 is packaged in a 16-pin SOIC format, making it a compact solution for power factor correction needs.