Power-MOSFETs with improved efficiency for multi-channel class-D audio amplifiers and packaging thereof

A stereo class-D audio system that comprises:

• four PMOS high-side devices;
• four NMOS low-side devices;
• where the drain of each high-side device is connected to the drain of a respective low-side device to form four H-bridge circuits with the half-bridge circuits grouped as two half-bridge pairs, each half-bridge circuit having an output node at the drains of its high and low-side devices;
• a package containing the two hall-bridge pairs;
• and
• a set of electrical contacts for connecting the class-D audio system to an external circuit, the set of electrical contacts including at least one supply contact and at least one ground contact for each of the two half-bridge pairs, the supply contact of each half-bridge pair connected to the sources of the high-side devices within that half-bridge pair and the ground contact of each half-bridge pair connected to the sources of the low-side devices within that half-bridge pair, the electrical contacts also including at least one output contact for each output node of each half-bridge circuit.