TIDT282 May 2022
This reference design provides 5.2-V, 4-W, isolated voltage from a 5-V DC input supply. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation. The high level of integration results in a simple, reliable, and high-density design with only one component crossing the isolation barrier.
The reference design was built by modifying the LM25184EVM-S12.