Texas Instruments High-Performance Analog PFC (Power Factor Correction) UCC28500DWTR

The UCC28500DWTR 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. This PFC controller operates with a wide range of input line voltages and includes features such as leading-edge modulation for the PFC stage and trailing-edge modulation for the second stage, which minimizes output ripple. It also incorporates a low start-up supply current, synchronized second stage start-up with programmable soft-start, and programmable shutdown capabilities. The UCC28500DWTR is available in a 20-pin SOIC package and is suitable for applications requiring efficient power factor correction and reliable performance across varying input conditions. It operates within a temperature range of -40¬8C to 85¬8C and includes built-in protections such as over-voltage protection and zero-power detection.