SNVA994A February 2022 – March 2023 LM5157 , LM5157-Q1 , LM51571-Q1 , LM5158 , LM5158-Q1 , LM51581 , LM51581-Q1
This section covers the equations for the selections of the external components against the application specification given in Table 2-1. Depending on the operating voltage range and power level, designing with the LM51571, LM5158 and LM51581, which maybe more suitable, can use the same equations with given application specifications.
Figure 4-1 shows the PSR flyback converter topology implemented with the LM5157 to produce a regulated voltage rail and three isolated voltage rails as specified in Table 2-1.