TIDT245 October 2021
This reference design is a 65-W, high-power density USB charger using the UCC28782 active-clamp flyback controller achieving 30-W/in power density. The maximum power rating is 65 W at 20 V VOUT across a universal AC input range. VOUT is also adjustable to 20-, 15-, 9-, and 5-V output voltage and 3 A. The design reaches a peak efficiency of 94%. The average efficiency and standby power levels are designed to meet DoE Level VI and CoC Tier 2 limits.