Digital input four-channel automotive Class-D audio amplifier
The TAS6424-Q1 device from Texas Instruments is a four-channel digital-input Class-D audio amplifier that implements a 2.1MHz PWM switching frequency that enables a cost-optimised solution in a very small PCB size, full operation down to 4.5V for start/stop events, and exceptional sound quality with up to 40kHz audio bandwidth.
The TAS6424-Q1 Class-D audio amplifier is designed for use in automotive head units and external amplifier modules. The device provides four channels at 27W into 4Ω at 10% THD+N and 45W into 2Ω at 10% THD+N from a 14.4V supply and 75W into 4Ω at ten percent THD+N from a 25-V supply.
The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions. The output switching frequency can be set either above the AM band, which eliminates the AM-band interference and reduces output filter size and cost, or below AM band to optimise efficiency.
For a pin compatible two-channel amplifier, see the TAS6422-Q1
The device is offered in a 56-pin HSSOP PowerPAD package with the exposed thermal pad up.
To learn more, click here.
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