REES52 Buck Boost Converter Display, Buck-Boost Board DC 5.5-30V 12v to DC 0.5-30V 5v 24v Adjustable Constant Current Voltage Step UP Down Voltage Regulator 4A 35W Power Supply Module : Amazon.in: Computers
Buck Boost Regulator Average Output Voltage Expression Derivation and Duty Cycle - ElectricalWorkbook