| Supports standby power consumption below 24mW
| Delivers 2.5 times greater volume, 2 octaves lower bass
| 86% efficiency with boost-type Class D amplifier

As devices become increasingly compact, many products are utilizing micro speakers. When speakers shrink, volume and sound pressure level decrease while resonant frequency increases, weakening the bass range. To increase volume and bass response, using powerful speakers easily causes micro speakers to be damaged by overheating and over excursion.
Maxim Integrated Korea announced on the 14th the launch of the MAX98390, a smart amplifier integrating DSM (Dynamic Speaker Management) algorithm to deliver micro speaker sound more powerfully and richly with greater efficiency.

The MAX98390 safely drives ultra-low-power-rated small speakers of 1~3W up to a maximum of 5.1W. It maximizes audio performance by delivering up to 2.5 times greater volume and 2 octaves lower bass compared to conventional 5V amplifiers.

The MAX98390, boasting standby power consumption below 24mW, achieves maximum efficiency of 86% as a boost-type Class D amplifier. With the PPR (Perceptual Power Reduction) function of DSM, it supports minimum standby power consumption below 24mW, making it suitable for low-power devices requiring extended battery life. Additionally, it is designed to enable on-chip DC resistance (Rdc) testing on the production line to ensure speaker impedance remains within acceptable tolerance ranges for quality assurance.

The MAX98390 protects speakers from overheating and excessive output through current and voltage sensing capabilities and DSM algorithm. The thermal protection function of DSM helps deliver maximum volume over an extended frequency range in a short time without complex programming. The excursion protection function enables sound output up to 2 octaves lower than the resonant frequency limit.

Through the MAX98390 equipped with user-friendly DSM Sound Studio software GUI, designers can easily and quickly verify characteristics of multiple speakers through the Quick Demo function, and shorten design time with convenient prototyping work.

Michael Van Den Broek, senior applications engineer at PUI Audio, stated, "Meeting customer audio expectations under constraints of small product size and power limitations is not easy. Having a turnkey solution like the MAX98390 in the toolbox makes it easier to improve micro speaker performance and ultimately increases customer satisfaction, our ultimate goal."

Greg Mow, business manager for mobile audio solutions at Maxim Integrated, said, "The MAX98390 smart amplifier was developed to improve sound quality with an ultra-compact form factor that can flexibly integrate into any device. With large, balanced sound as well as the highest efficiency and design ease, we can provide customers with best-in-class immersive sound experience."