https://www.ti.com/ AUTOMOTIVE AUDIO SYSTEMS 27 www.power-mag.com Issue 2 2024 Power Electronics Europe Figure 2 demonstrates how amplifiers with 1L modulation reduce the number of inductors of a 20-channel audio system to 10 channels, resulting in a 34% size reduction. An obvious concern for system architects would be how easy it is to implement this amplifier. Our 1L modulation technology is meant to incorporate into systems seamlessly. With 1L modulation, TI created a modulation scheme that fits into the amplifier in such a way that designers can reap all of the benefits without introducing significant design challenges, while still maintaining high-quality Class-D audio performance. The TAS67524-Q1 audio amplifier incorporates features such as real-time load diagnostics, current sense per channel, and up to 19V operation for safe operation and higher performance. Real-time load diagnostics tracks the status of the load for open loads, shorted loads, shorts to power and shorts to ground, whether audio is playing or not. This feature ensures that the amplifier is functioning properly and provides a safe and reliable listening experience. Another notable feature is the lowlatency path option. If the system requires active noise cancellation or road noise cancellation, the TAS67524-Q1 enables fully-featured low-latency audio for quick response of the injected audio signal. Conclusion The benefits of our 1L modulation technology can help you create smaller and lighter designs more affordably than current solutions, all while prioritizing the automotive audio experience and still pushing the boundaries of your design. Additional resources Order the TAS67524 evaluation module (TAS67524Q1EVM). Check out TI’s full range of end-toend audio solutions, including amplifiers, processors, converters and switches. Figure 1 Size comparison of an 8.2µH inductor (400kHz) and a tiny 3.3µH inductor (2.1MHz) Figure 2 A 20-channel automotive audio system design featuring TI’s TAS6424E-Q1 Class-D amplifiers (top) compared to TI’s five TAS67524-Q1 Class-D amplifiers (bottom)
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