A voltage detection circuit for a switching converter having a switch and a magnetic element connected in series, where a first terminal of the switch and a first terminal of the magnetic element are connected to a common node, the voltage detection circuit including: an average circuit configured to receive a first voltage across the switch, and to generate a second voltage representing an average value of the first voltage; and where the second voltage represents a voltage between a second terminal of the switch and a second terminal of the magnetic element in a steady state of the switching converter.