Single-ended primary-inductor converter
![Figure 1: Schematic of SEPIC.](/Images/godic/202502/10/SEPIC_Schematic5227.gif")
![Figure 2: With S1 closed current increases through L1 (green) and C1 discharges increasing current in L2 (red)](/Images/godic/202502/10/S1_closed5227.jpg")
![Figure 3: With S1 open current through L1 (green) and current through L2 (red) produce current through the load](/Images/godic/202502/10/S1_open5227.jpg")
The single-ended primary-inductor converter (SEPIC) is a type of DC/DC converter allowing the electrical potential (voltage) at its output to be greater than, less than, or equal to that at its input. The output of the SEPIC is controlled by the duty cycle of the control transistor.