An audio power amplifier boosts low-level audio signals to drive car speakers. ST’s automotive amplifiers combine excellent sound quality with robust protection and safety features to ensure reliable performance and deliver the clean, powerful sound users expect.
Designed to meet the latest eco-friendly standards, our portfolio includes Class AB, SB, SB-I, Class G (with embedded buck controller), and Class D devices with medium to high PWM switching frequencies. These amplifiers support analog and digital inputs and are available with or without I²C interfaces, offering flexibility for various automotive designs.
To meet stringent automotive requirements, ST amplifiers feature advanced diagnostics — from basic pin and I²C checks to real-time load current monitoring — helping to simplify fault detection and improve system reliability.
Additionally, developers have access to a comprehensive ecosystem that simplifies design and accelerates time-to-market.
Applications
Our broad portfolio empowers you to design audio solutions tailored to diverse automotive needs—from Head Units and smart cockpits to external sound systems, AVAS, telematics, and emergency call systems; ensuring enhanced safety, connectivity, and a better user experience across all vehicle platforms.
Product types
The main architectures of audio power amplifiers used in automotive applications are the linear class AB and the switching class D amplifier.
Benefits
Comprehensive product range and power options
From single-channel to quad-channel devices, delivering 10W to 400W peak per channel, enabling tailored solutions for diverse automotive audio applications.
Robust automotive-grade design
Integrated protection against short circuits, ESD, load dump, and over-temperature, combined with compact package options for reliable, space-efficient designs.
Premium audio performance and advanced features
Exceptional sound quality with low THD, output noise, crosstalk, and high PSRR, dynamic range, and SNR. Includes real-time monitoring, low latency, proprietary feedback loops, support for low-impedance speakers down to 1 ohm, voltage monitor, spread spectrum, low latency path, and digital impedance meter.
Enhanced diagnostics for system reliability
Advanced diagnostic processors simplify fault detection and improve overall system robustness, reducing maintenance and warranty costs.
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Power amplifier system for automotive applications
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