EVAL-SSM2377Z

EVAL-SSM2377Z is an evaluation board for SSM2377 filterless, class-D audio amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components. It is capable of delivering 2.5W of continuous output power with <1% THD + N when driving a 4Ω load from a 5.0V supply. Spread-spectrum PDM is used to provide lower EMI-radiated emissions compared with other Class-D architectures. The inherent randomized nature of spread-spectrum PDM eliminates the clock intermodulation (beating effect) of several amplifiers in close proximity. The SSM2377 produces ultralow EMI emissions that significantly reduce the radiated emissions at the Class-D outputs, particularly above 100MHz. The SSM2377 passes FCC Class B radiated emission testing with 50 cm, unshielded speaker cable without any external filtering. The device also includes a gain select pin that allows the user to select a 6dB or a 12dB gain.

• Operates from a single 2.5V to 5.5V supply