Cirrus Logic CS35L41B-CWZR

The CS35L41 is the industry's first 55nm smart audio amplifier solution with integrated DSP. The device features a mono 5.3W boosted Class-D amplifier that delivers very loud audio without compromising sound quality, with high efficiency and the lowest noise and quiescent power consumption in its class. Voltage and current sensing feedback at the speaker output and battery improves the accuracy of the amplifier and integrated algorithms. The speaker protection algorithm allows the amplifier to safely drive high output power while ensuring that the speaker's thermal and excursion limits are not exceeded, achieving maximum loudness. Audio enhancement algorithms provide equalization, compression, and psychoacoustic improvements to fine-tune the speaker, improving clarity, loudness, and frequency response while maintaining audio quality. An advanced battery management system adapts to speaker, audio, and battery conditions, intelligently regulating battery current without sacrificing loudness or audio quality. The CS35L41 delivers this level of performance in a package smaller than any other smart amplifier in its class — nearly half the size of other leading DSP smart amplifiers.

• Boost output – 11 V
• High output power – 5.3 W
• Idle channel noise – 9 µV
• Low quiescent power consumption – 6.7 mW
• Integrated DSP
• SoundClear playback enhancement and speaker protection
• Advanced battery management system
• I²S, I²C, PDM inputs
• Supply voltage – 2.5 V to 5.5 V
• Stereo configuration using two CS35L41 devices
• Space-saving 30-ball WLCSP package – 5.64 mm² footprint, 0.4 mm pitch

• Mobile systems