Texas Instruments High-Performance Analog PFC (Power Factor Correction) UCC28500DWTRG4

The UCC28500DWTRG4 is a power factor correction (PFC) integrated circuit designed to control a boost preregulator and a downstream DC-DC converter. It achieves near-unity power factor by shaping the AC input line current to match the AC input voltage using average current-mode control. The device features accurate power limiting, improved feedforward line regulation, and peak current-mode control for the DC-DC conversion stage. Key functionalities include leading-edge modulation for the PFC stage and trailing-edge modulation for the second stage, which minimizes output ripple. The UCC28500DWTRG4 supports a wide input voltage range and incorporates a low start-up supply current, synchronized second stage start-up, and programmable soft-start and shutdown features. It also includes over-voltage protection and zero-power detection to enhance reliability. The device is available in a 20-pin small outline package, making it suitable for various applications requiring efficient power management and high performance in power factor correction.