Reference Designs
Universal AC DLP Power Supply (40V @ 10A)
Texas Instruments
This reference design provides 400W of power from a universal AC input with power factor correction. The UCC28019A controls a PFC boost front end, while the UCC25600 LLC resonant-half bridge converts the PFC output to isolated 40V, 33V, and 27V outputs. The total system efficiency is over 89% with a 230VAC input and over 85% with an 115VAC input.