STMicroelectronics has launched FDA803D and FDA903D digital-input automotive audio amplifiers, which are richly featured to simplify integration and maximise reliability in telematics and emergency-eCall equipment, Acoustic Vehicle Alerting Systems (AVAS) in hybrid/electric vehicles, and to enhance high-end infotainment systems.
With I2S and TDM digital-audio inputs and feedback-after-filter topology for low noise and high sound quality, these 1x45W class-D amplifiers simplify design and save BOM costs. Combining these features with full I2C automotive-grade diagnostics including unique offset and open-load detection in play mode, the FDA803D and FDA903D realise the next generation of amplifiers for cost-effective essential safety equipment. Thanks to these integrated features, they simplify certification to the required ISO 26262 ASIL (Automotive Safety Integrity Level), too.
The FDA903D has an additional load-current monitoring feature, which allows continuous monitoring of the speaker thus enabling advanced diagnostics as well as speaker performance enhancement.
The devices extend ST’s FDA family of robust full-digital audio amplifiers for automotive applications, which includes 2-channel and 4-channel devices up to 4x135W with features for reliable diagnostics and ST’s innovative feedback-after-filter concept.
The FDA803D and FDA903D can be used for adding extra audio channels to high-end infotainment systems.