The LM4962 is a compact 5mm x 5mm audio amplifier that integrates a built-in boost converter, making it ideal for driving both ceramic speakers and stereo speaker systems. It features an audio power amplifier designed to support mono ceramic speaker applications. The chip operates on a 3.2V DC power supply and can deliver a 15V peak-to-peak output for bridged loads (BTL) with a total harmonic distortion and noise (THD+N) of less than 1%. This makes it suitable for high-quality audio applications where clarity and performance are critical. Additionally, the LM4962 includes overcurrent and overvoltage protection mechanisms to safeguard the internal boost converter. A soft-start function in the built-in DC/DC converter ensures smooth power-up and prevents voltage spikes. The LM4953 is another audio amplifier designed specifically for ceramic speakers, utilizing a charge pump to efficiently drive the load. It comes in a small 3mm x 4mm package but still includes an integrated charge pump and audio amplifier. This device can boost a 3.6V supply to provide up to 12.6V peak-to-peak for a 2µF + 30W bridge load, while maintaining low distortion and noise levels below 1%. Its design simplifies the overall system by requiring only eight external components, making it a cost-effective and space-efficient solution. Both the LM4962 and LM4953 include a low-power shutdown mode and internal thermal shutdown protection, eliminating the need for a startup capacitor or transient voltage suppression circuit. They also feature a "switch/switch" noise suppression circuit to minimize interference and improve sound quality. Their unity gain is highly stable and can be easily adjusted using an external gain-setting resistor, offering flexibility for different audio applications. These features make them excellent choices for designers looking for reliable, efficient, and high-performance audio solutions in compact form factors.

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