SLUSBL5A February 2015 – June 2019 UCC28730
A typical application for the UCC28730 includes the compatible UCC24650 Wake-Up Monitor device to regulate an isolated low-voltage DC output with low output capacitance. When the UCC28730 is operating in the low-frequency Wait state, the UCC24650 alerts the UCC28730 to a sudden load increase, avoiding the need for extremely high output capacitance to hold up between power cycles. As shown in Figure 23, the output rectification uses a ground-referenced diode to facilitate application of the UCC24650. A ground-referenced synchronous rectifier may also be used.
Figure 23 is simplified to illustrate the basic application of the UCC28730 and does not show all of the components and networks needed for an actual converter design, nor all of the possible circuit variations.