SNVSAE4C July 2015 – October 2018 LM5160-Q1
The secondary rectifier diode must block the maximum input voltage multiplied by the transformer turns ratio. Determine the minimum diode reverse voltage VR(diode) rating from Equation 23.
Select a diode with 60 V or higher reverse voltage rating for this application. If the input voltage (VIN) has transients above the normal operating maximum input voltage of 32 V, then the worst-case transient input voltage must be used in the diode voltage calculation given by Equation 23.