A SWITCHING CIRCUIT, CORRESPONDING DEVICE AND METHOD

A switching circuit for use e.g. in class D switching audio amplifiers comprises a switching circuit stage comprising first (HB1) and second (HB2) half bridges with output nodes (Vout1, Vout2) configured for supplying an electrical load (L) via respective filter networks (Lo1, C1; LO2, C2). Control circuitry is provided to control alternate switching sequences of the transistors in the half bridges wherein a first pair of transistors comprising the high-side transistor (H2 resp. H1) in one (HB2 resp. HB1) of the half bridges and the low-side transistor (L1 resp. L2) in the other (HB1, resp. HB2) of the half bridges is switched to a non-conductive state, and a second pair of transistors comprising the high-side transistor (H1 resp. H2) in the other (HB1 resp. HB2) of the half bridges and the low-side transistor (L2 resp. L1) in the one (HB2 resp. HB1) of the half bridges is switched to a conductive state. A current flow line is provided between the output nodes (Vout1, Vout2) of the half bridges (HB1, HB2) comprising an inductance (Laux) between two switches (S1, S22). First and second capacitances (Caux1, Caux2) are coupled with the output nodes (Vout1, Vout2) of the half bridges (HB1, HB2). The control circuitry switches the first (S1) and second (S2) switches to the conductive state at intervals in the alternate switching sequences of the transistors in the half bridges between switching the first pair of transistors to a non-conductive state and switching the second pair of transistors to a conductive state.