DN05059/D, NCP1077, 12 Vout, 6 Watt, Off-line Buck Regulator Using a Tapped Inductor Design Note

DN05059/D, Design Note describes a simple, low power, constant voltage output variation of the buck power converter intended for powering electronics for white goods, electrical meters, and industrial equipment where isolation from the AC mains is not required and maximum efficiency is essential. This buck circuit design has been modified by tapping the freewheel diode connection to the inductor to provide several advantages over the conventional buck circuit. Application note AND8318 provides a detailed discussion of the tapped inductor buck circuit theory which will not be covered in detail in this design note