Class D audio amp is for automotive design

Designed specifically for automotive applications, the TAS6424-Q1 is the first 2.1MHz Class-D audio amplifier specifically designed for this market. It supports high-resolution 96kHz digital input and enables high-fidelity audio with low distortion in automotive infotainment systems.

The TAS6424-Q1 enables the use of smaller external filters and eliminates up to 18 external components, claims the company, compared to existing Class-D solutions. Maximum output power is 75W/channel. It is also claimed to have the industry’s highest switching rate and is the only audio amplifier that switches above the AM band. This eliminates the need for complex avoidance schemes and eases EMC designs while enabling the system to meet CISPR 25, Class 5 EMC requirements, says the company.

It also maintains stable audio playback while driving low impedance loads of 2Ohms and provides detailed, on-chip phase and impedance measurements. This allows designers to configure the device with outputs, such as woofer, tweeter and line-level connections.

An integrated DAC helps deliver a low system output noise of 42microVrms for automotive designs, like external amplifiers and head units. Power dissipation is reduced by up to 60 per cent, compared to Class-AB amplifiers, and reduces the need for fans or large heat sinks.

For design support, there is the PurePath Console GUI and designer can download an IBIS model or request an evaluation module.

The TAS6424-Q1 is available now in a PowerPAD thermally enhanced shrink small-outline package (HSSOP).

http://www.ti.com

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