The EVQ7795A-R-00A is an evaluation board designed to demonstrate the capabilities of the MPQ7795A-AEC1, a low-EMI, differential analog input, Class-D audio amplifier with I²C diagnostics. The MPQ7795A-AEC1 can drive a mono speaker in a bridge-tied load (BTL) configuration.

The MPQ7795A-AEC1 employs a BTL structure to deliver up to 24.5W of power to 4Ω speakers with a 14.4V power supply. MPS’s Class-D audio amplifiers exhibit the high fidelity of Class-A and Class-B amplifiers at higher efficiencies.

The switching frequency (f_SW) can be set to 330kHz, 384kHz, 470kHz, or 2.2MHz, and can achieve >90% efficiency at both 470kHz and 2.2MHz.

The MPQ7795A-AEC1 integrates load diagnostic functionality to detect open load, short load, load short-to-GND, and load short-to-PVDD conditions.

The diagnostic runs anytime the device is enabled, and helps protect both the load and the device.

Full protection features include over-current protection (OCP), under-voltage protection (UVP), thermal shutdown, and adjustable power limiting.

The adjustable power limit (P_LIMIT) sets the output peak-to-peak voltage limit (V_{PP_LIMIT}) by limiting the duty cycle to a fixed maximum value. V_{PP_LIMIT} can be considered the virtual voltage rail. The power supply input (PVDD) voltage (V_PVDD) is greater than V_{PP_LIMIT}.

The EVQ7795A-R-00A is a fully assembled and tested evaluation board. The MPQ7795A-AEC1 is a fully integrated audio amplifier that reduces total solution size. It is available in a QFN-24 (4mmx4mm) package, and is AEC-Q100 qualified.