4-channel amplifier providing high-resolution audio quality in minimal space

TI has launched for the first time a 2.1MHz Class D audio amplifier specifically designed for automotive applications.

The compact TAS6424-Q1, supporting 96kHz high-resolution digital input, delivers high-performance audio quality with low distortion in automotive infotainment applications.

The new TAS6424-Q1 enables the use of smaller external filters, reducing external components by up to 18 pieces, thereby reducing system size and cost compared to conventional Class D solutions. Offering a maximum output of 75W per channel, this device boasts the industry's fastest switching speed and is the only audio amplifier capable of switching at frequencies higher than the AM band.

With switching frequencies higher than the AM band, this product requires no complex mitigation techniques and simplifies electromagnetic compatibility (EMC) design to meet CISPR Class 5 EMC requirements from the International Special Committee on Radio Interference (CISPR, Comité International Spécial des Perturbations Radioélectriques).

Additionally, stable audio playback is possible while driving low impedance of 2Ω, and detailed on-chip phase and impedance measurement are provided to enable developers to configure various output devices such as woofers, tweeters, and line-level connectors.

High-frequency switching improves distortion, power supply ripple rejection, and dynamic response. With an integrated digital-to-analog converter, it delivers low system output noise of 42uVrms, making it suitable for automotive designs with external amplifiers and head units.

In particular, compared to Class AB amplifiers, it reduces power loss by up to 60%, significantly reducing the need for fans or large heat sinks.