Figure below shows the Circuit Diagram and Waveform of step up chopper.
â€¢ Step-up chopper is used to obtain a load voltage higher than the input voltage V.
â€¢ The values of L and C are chosen depending upon the requirement of output voltage and current.
â€¢ When the chopper is ON, the inductor L is connected across the supply. The inductor current â€˜Iâ€™ rises and the inductor stores energy during the ON time of the chopper, tON.
â€¢ When the chopper is off, the inductor current I is forced to flow through the diode D and load for a period, tOFF.
â€¢ The current tends to decrease resulting in reversing the polarity of induced EMF in L. Therefore voltage across load is given by,
Hence, V0 > V.