UCC28019A

The UCC28019A from Texas Instruments is an 8-pin active Power Factor Correction (PFC) controller that utilizes a boost topology and operates in Continuous Conduction Mode (CCM). This controller is well-suited for power systems in the 100 W to greater than 2 kW range, accommodating a wide-range universal AC input voltage.

Key electrical features include a fixed 65-kHz operating frequency with ±5% accuracy at 25°C, and a maximum duty cycle of 98% (typical). It offers fast 1.5-A peak gate current drive and an internal clamp limiting gate drive voltage to 12.5 V. The device also includes features like input brown-out protection, output over/undervoltage protection, cycle-by-cycle peak current limiting, and open-loop detection.

For standby operation, the UCC28019A supports a low-power user-controlled mode by pulling the VSENSE pin below 0.77 V. Start-up current during undervoltage lockout is kept below 200 μA. The controller uses average current mode control for low-distortion input current wave shaping without requiring input line sensing, reducing external component count.

Available in SOIC (8) and PDIP (8) packages, the UCC28019A is designed for applications such as digital TVs, home electronics, white goods, industrial electronics, and server/desktop power supplies.