Update: 30 September, 2023
This document introduces UCC28521/28 combination PFC/PWM controllers, which provide complete control functionality for any off-line power system requiring compliance with the IEC1000−3−2 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. Based on the UCC28511, the new devices employ an average current mode control architecture with input voltage feedforward. The major difference of the UCC28521/28 is that it uses trailing-edge PFC and trailing-edge PWM modulation, which provides higher switching speed.
File format: PDF
Size: -
MD5 Checksum: 43D86581C9DCEB97775DDAF8A695C808
Publication date: 07 May, 2012
Downloads: -
PDF Link: TEXAS INSTRUMENTS UCC28521 handbook PDF