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The RTQ9124T-QA is an ultra-low output noise, high-efficiency, mono channel class-D audio power amplifier. It can achieve over 85.5% power efficiency, with an output switching frequency of up to 2.1MHz, enabling a cost-optimized solution in a very small PCB size. The switching frequency can be set either above the AM band, which eliminates AM-band interference and reduces output filter size and cost, or below the AM band to optimize efficiency.The RTQ9124T-QA is fully configurable through the I<sup>2</sup>C bus interface and includes a comprehensive diagnostics array specifically designed for automotive applications. The built-in anti-pop functions reduce 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 RTQ9124T-QA is a 3-wire device that receives all clocks from external sources using standard I<sup>2</sup>S and TDM (Time-Division Multiplexing) formats. It supports a wide input sampling rate from 8kHz to 192kHz. The RTQ9124T-QA is intended for various automotive audio applications, including telematics and e-call systems. The RTQ9124T-QA is available in a TSSOP-28 (Exposed Pad) package. The recommended junction temperature range is -40°C to 150°C, and the ambient temperature range is -40°C to 125°C.
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<li class="mv5"> AEC-Q100 Qualified<br /> </li><li class="mv5"> I<sup>2</sup>S and TDM Input (Up to 16CH TDM)<br /> </li><li class="mv5"> 1x27W, THD+N = 10%, 4Ω, 14.4V<br /> </li><li class="mv5"> THD+N is 0.05%<br /> </li><li class="mv5"> SNR up to 115dB<br /> </li><li class="mv5"> Ultra-Low Noise = 18μV<br /> </li><li class="mv5"> Switching Frequency up to 2.1MHz<br /> </li><li class="mv5"> Sampling Frequency from 8kHz to 192kHz<br /> </li><li class="mv5"> I<sup>2</sup>C Control with 4 Address Options<br /> </li><li class="mv5"> Built-In Anti-Pop Function <br /> </li><li class="mv5"> Built-In Thermal Fold-Back and Clip Detection<br /> </li><li class="mv5"> Ultra-Low Quiescent Mode (ULQM)<br /> </li><li class="mv5"> AC-DC Load Diagnostics<br /> </li><li class="mv5"> Real Time Load Diagnostics<br /> </li><li class="mv5"> Temperature and Voltage Sensing via I<sup>2</sup>C<br /> </li><li class="mv5"> Protection Features<br /> ► Output Short-Circuit<br /> ► Overvoltage and Undervoltage<br /> ► Overcurrent Warning<br /> ► Overcurrent<br /> ► Over-Temperature<br /> ► DC Detection <br /> ► 40V Load Dump <br /> </li><li class="mv5"> Ambient Temperature Range: -40°C to 125°C<br /> </li><li class="mv5"> Junction Temperature Range: -40°C to 150°C</li>
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<li class="mv5"> e-Call Systems<br /> </li><li class="mv5"> Telematics<br /> </li><li class="mv5"> AVAS</li>
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