FSA221UMX Integrated Circuits (ICs)

Audio Special Purpose: FSA221UMX application field and working principle

FSA221UMX is a high-compliance audio special purpose IC (Integrated Circuit) for active sound or speaker systems. This IC provides improved sound characteristic and performance through digital signal processing supplied via a digital audio bus and representing with a PWM signal. With its customized audio special purpose, FSAR221UMX realises superior audio characteristics such as low propagation delay and stable output without distortion from various audio sources. This IC is suitable for use both in the automotive audio systems and in the application of separate speaker systems. In addition, the FSA221UMX features an integrated amplifier, speaker compensation circuit, and low jitter PWM modulation, enabling accurate and clear sound reproduction.

The popularity of FSA221UMX is mainly derived from its working principle. Generally, it is composed of four major elements: pre-filter, amplifier, low-jitter PWM modulation and speaker compensation circuit. The input signals enter the pre-filter which isolates distortion signals generated from various audio sources. The pre-filter is followed by an amplifier which amplifies the signals of the pre-filter. Then the low-jitter PWM modulation controls the amplitude of the modulated signals and provides the digital-to-analogue conversion. Simultaneously, the speaker compensation circuit adjusts the frequency response characteristic of speakers which in turn work together with the PWM modulation to accurately reproduce the digital audio signals. Therefore, the FSA221UMX is able to provide best in class audio quality.

The FSA221UMX is featured with low power consumption, low BOM cost, small sound footprint and easy system integration. Therefore, the FSA221UMX has become one of the most popular audio processor IC in automotive audio systems and home theatre systems. Being cost-effective and easy to integrate, FSA221UMX is a highly recommendable choice for both automotive and residential audio applications.

In general, FSA221UMX is suitable for mid to high-power applications and is ideal for any audio applications where high-performance, low-power and low cost are important. It offers excellent sound reproduction quality and accuracy, stable output amplifiers, and low jitter PWM modulation. Its embedded pre-filter and speaker compensation circuit also provide improved audio character for various audio sources. With these functions, FSA221UMX is able to deliver audio quality fit for both automotive and home theater speakers.