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STMicroelectronics’ Automotive Audio Power Amplifiers Bring Digital Flexibility to eCall, Telematics and AVAS - The FDA803S and FDA903S are the newest single-channel fully differential 10W Class-D audio power amplifiers in the STMicroelectronics FDA (fully digital amplifier) family - ST.com
STMicroelectronics’ Automotive Audio Power Amplifiers Bring Digital Flexibility to eCall, Telematics and AVAS

 

PRZOOM - /newswire/ - Geneva, Switzerland, 2022/12/02 - The FDA803S and FDA903S are the newest single-channel fully differential 10W Class-D audio power amplifiers in the STMicroelectronics FDA (fully digital amplifier) family - ST.com. [NYSE: STM]

   
 
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They are designed for automotive applications like eCall, telematics, and wherever an audio channel needs to reproduce human voice, music, or warning messages at a standard output power level of up to 10W.

The amplifiers integrate an I2S front end, digital core, 24-bit digital-to-analog converter (DAC) with 100dB resolution, and class-D PWM output stage. The integrated digital audio processing ensures high sound quality within a compact circuit footprint. Feedback within the chip, before the external L-C output filter, simplifies the circuit design and saves space.

With full I2C configurability and in-play diagnostics that include clipping detection, thermal warning, overcurrent protection, and open-load detection, both amplifiers minimize external components and bill-of-materials costs. The FDA903S additionally integrates a real-time load-current monitor, allowing self-diagnostic capability compatible with the demands of functional-safety applications up to ASIL A.

Both devices come in QFN32 5mm x 5mm exposed pad-down packages that enable a compact and cost-effective, fully digital design without the need for a heatsink. The low component count and heatsink-free implementation minimize the bulkiness of power amplifiers built using these ICs. Also benefiting from low quiescent current, the opportunity to minimize size, weight, and power consumption contributes towards improving overall vehicle energy efficiency.

Both the FDA803S and FDA903S feature an I2S digital input and a time-division multiplexing (TDM) interface. They can be configured for various sampling frequencies between 8kHz up to 96kHz to optimize the performance with a wide variety of audio sources. The lower sampling frequencies, from 8kHz to 32kHz, enable designers to save memory space in applications such as warning tone generators.

The EVAL-FDA903S evaluation board gives designers a jump-start to new audio projects based on either device and is available for $189.88.

The FDA803S and FDA903S are in production now. Please contact your STMicroelectronics office for pricing information and sample requests.

AVAS stands for Acoustic Vehicle Alerting System

About STMicroelectronics

At ST (st.com), we are 48,000 creators and makers of semiconductor technologies mastering the semiconductor supply chain with state-of-the-art manufacturing facilities. An integrated device manufacturer, we work with more than 200,000 customers and thousands of partners to design and build products, solutions, and ecosystems that address their challenges and opportunities, and the need to support a more sustainable world. Our technologies enable smarter mobility, more efficient power and energy management, and the wide-scale deployment of the Internet of Things and connectivity. ST is committed to becoming carbon neutral by 2027.

 
 
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STMicroelectronics’ Automotive Audio Power Amplifiers Bring Digital Flexibility to eCall, Telematics and AVAS

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