Rochester Electronics PMIC - PFC (Power Factor Correction) UCC28500DW

The UCC28500DW is a Power Factor Correction (PFC) controller designed to provide efficient power management in electronic applications. It combines PFC and downstream converter controls, achieving near-unity power factor by shaping the AC input line current to match the AC input voltage. The device features accurate power limiting, improved feedforward line regulation, and peak current-mode control for the downstream DC-DC conversion. This controller operates with a wide input voltage range 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 supports synchronized start-up with programmable soft-start and shutdown capabilities. The UCC28500DW is available in a 20-pin DW package and is suitable for applications requiring low start-up supply current and robust performance under varying load conditions. Engineers considering this product should note its integrated protection features, including over-voltage protection and zero-power detection, which enhance reliability in power management systems.