2.1-MHz class-D amp for automotive audio designs

2.1-MHz class-D amp for automotive audio designs

New Products |
By Graham Prophet

The TAS6424-Q1 enables the use of smaller external filters and eliminates up to 18 external components to reduce system size and cost compared to existing Class-D solutions. With maximum output power of 75W per channel, the device features the highest-available switching rate and is the only audio amplifier that switches above the AM band.


This reduces electromagnetic interference (EMI): switching above the AM band eliminates the need for complex avoidance schemes and eases electromagnetic compatibility (EMC) designs while enabling the system to meet (CISPR) 25 Class 5 EMC requirements. The chip supports low impedance and maintains stable audio playback while driving low impedance loads of 2 Ohms.

With an advanced AC load diagnostics and line driver mode it provides detailed on-chip phase and impedance measurements that designers can use to configure the device with various outputs, such as woofer, tweeter and line-level connections. Enhanced audio quality comes with reduced distortion, better power-supply rejection and dynamic response with high-frequency switching.

An integrated digital-to-analog converter helps deliver a low system output noise of 42 µVrms for automotive designs such as external amplifiers and head units. Better thermal performance reduces power dissipation by as much as 60% compared to Class-AB amplifiers.


TI’s PurePath Console graphical user interface is available to help designers configure the TAS6424-Q1. To simulate and optimize the device, designers can download an IBIS model or request a TAS6424-Q1 evaluation module.


In a PowerPAD thermally enhanced shrink small-outline package (HSSOP) the device is priced at $5.97 (1000).





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