Audio, haptics & piezo

Our smart amplifier technology uses real-time current (I) and voltage (V) sensing to actively monitor speaker conditions and prevent damage from excessive temperature or excursion. Closed-loop protection enables you to safely push speakers to their performance limits without affecting reliability.

By optimizing output in real time, IV sensing delivers louder, cleaner sound and helps you achieve premium audio performance in space- and cost-constrained automotive designs.

Our audio solutions for vehicles deliver clear, high-quality sound with compact, efficient designs. Our class-D amplifiers offer scalable performance from one to four channels, featuring one-inductor (1L) modulation and 2.1MHz switching, supporting systems from unboosted rails up to 45V.

Our audio converters integrate a boost converter and low-dropout regulator for high-voltage microphone bias with input fault diagnostics, reducing bill of materials, board space and complexity. With expertise across infotainment, safety alerts, emergency call, acoustic vehicle alerting systems, instrument clusters and autonomous driving, we can help you build reliable automotive audio systems that meet demanding performance and efficiency requirements.

Our one-inductor (1L) modulation is a proprietary automotive innovation that reduces the inductor count in inductor-capacitor filters by 50%, lowering cost, saving printed circuit board space, and minimizing system weight. Eliminating switching on one half bridge per channel reduces losses and increases efficiency by as much as 7% compared to traditional class-D modulation.

This technology integrates easily into class-D amplifiers without adding design complexity, while maintaining high-quality automotive audio performance. Our TAS67x family incorporates 1L modulation and offers four channels, 19V or 26V operation, and real-time load diagnostics.

Our audio amplifiers include advanced technologies to maximize efficiency and reduce power losses. A Y-bridge intelligently switches between voltage rails based on power demand, lowering idle consumption by as much as 90% and improving efficiency 15% to 20%.

Class-H amplifiers work with an internal or external buck-boost converter to dynamically adjust the supply voltage using envelope tracking, providing only the power that the audio signal needs. These features help automotive and battery-powered audio systems run cooler, extend battery life, and maintain high-quality sound.

Low- and ultralow-latency filters in our audio converters deliver precise sound reproduction with minimal delay and phase deviation. At a 192kHz sampling rate, low-latency filters achieve a 28.2μs group delay, while ultra-low-latency filters have a group delay of 8.9μs.

In automotive systems, faster audio signal delivery enables responsive active noise cancellation and road-noise suppression, with more than 70% lower signal delay at 48kHz for a quieter, more comfortable driving experience.

Reducing bill-of-materials (BOM) cost and board space is a priority for automotive and portable audio designers. Embedding important functions directly into our devices minimizes the need for external components while improving performance and reliability.

Our portfolio integrates high common-mode rejection ratio line receivers, boost converters with low-dropout regulators, successive approximation register analog-to-digital converters for input diagnostics, headphone amplifiers, digital signal processing (DSP) for advanced equalization and speaker protection, real-time load diagnostics, and class-H control for enhanced efficiency. This integration simplifies designs and accelerates time to market without compromising sound quality.