1x10W, Digital Input Automotive Class-D Audio Amplifier with Current Sense and Real-Time Load Diagnostics

The RTQ9124DL-QA is an ultra-low output noise, high-efficiency, mono channel class-D audio power amplifier, delivering 10W into 4Ω at 1% THD+N from a 14.4V supply. It can achieve over 80% power efficiency, with an output switching frequency of up to 2.1MHz, enabling a cost-optimized solution in a very small PCB size.The RTQ9124DL-QA is fully configurable through the I²C bus interface and includes a comprehensive diagnostics array specifically designed for automotive applications. During audio playback, the status can be monitored through the output current sense, which reports measurements to a host processor via I²S or TDM with minimal delay.The built-in anti-pop function reduces speaker pop noise under all scenarios. Additionally, the built-in protection circuits provide thermal fold-back, over-temperature, overcurrent, overvoltage, and undervoltage protection, and report error status.The RTQ9124DL-QA is a 3-wire device that receives all clocks from external sources using standard I²S and TDM (Time-Division Multiplexing) formats. It supports a wide input sampling rate from 8kHz to 96kHz.The RTQ9124DL-QA is intended for various automotive audio applications, including telematics and e-call systems. The RTQ9124DL-QA is available in a WET-VQFN-32L 5x5 package. The recommended junction temperature range is -40°C to 150°C, and the ambient temperature range is -40°C to 125°C.