The TL431LI is used in the feedback network on the secondary side in an isolated flyback with optocoupler design. Figure 25 shows the simplified flyback converter with the TL431LI. For this design example, use the parameters in Table 4 as the input parameters. In this example, a simplified design procedure will be discussed. The compensation network for the feedback network is beyond the scope of this section. Details on compensation network can be found on SLUA671.
|DESIGN PARAMETER||EXAMPLE VALUE|
|Voltage Output||15 V|
|Secondary Side Feedback Loop Accuracy||< 3%|