EVAL-SSM2529Z: 3.1W @ 4 Ω, 2.5 ~ 5.5V, Class D

The SSM2529 is a digital input, Class-D power amplifier that combines a digital-to-analog converter (DAC), a low power audio specific digital signal processor, and a sigma-delta Class-D modulator. This unique architecture enables extremely low real-world power consumption from digital audio sources with excellent audio performance. The SSM2529 is ideal for power sensitive applications, such as mobile phones and portable media players, where system noise can the corrupt small analog signals that are sent to an analog input audio amplifier.

The audio input is provided via a serial audio interface that can be programmed to accept all common audio formats, including I2S, TDM, and PDM. Control of the IC is provided via an I2C control interface. An alternative to I2C control is standalone operation mode, which allows several settings that are adjusted by off-chip external resistors. The SSM2529 can accept a variety of input MCLK frequencies and can use BCLK as the clock source in some configurations. An integrated PLL can also provide the device master clock.

The integrated DSP includes soft digital volume control circuits; a de-emphasis, high-pass filter; a seven-band programmable equalizer; and a programmable digital dynamic range compressor. In addition, the part includes a feedforward speaker temperature prediction module to protect the loudspeaker. The SSM2529 supports single-supply mode, where DVDD is provided by the on-chip LDO regulator, eliminating the need for an external digital core supply.

The SSM2529 is specified over the industrial temperature range of -40°C to +85°C. It has built-in thermal shutdown and output shortcircuit protection. It is available in a 16-ball, 1.92 mm × 1.94 mm wafer level chip scale package (WLCSP).