SLUSBL5A February 2015 – June 2019 UCC28730
The UCC28730 device is a PSR controller optimized for isolated-flyback AC-to-DC single-output supply applications in the 5-W to 25-W range, providing constant-voltage (CV) mode control and constant current (CC) mode control for precise output regulation. Higher-power, multiple-output applications and other variations may also be supported. It is capable of switching at a very low frequency to facilitate achieving stand-by input power consumption of less than 5 mW.
To maintain fast transient response at such low-switching frequencies, the device recognizes a wake-up signal at the VS input generated by a companion device, the secondary-side voltage monitor UCC24650.