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The RTQ9124 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 RTQ9124 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 RTQ9124 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 RTQ9124 is intended for various automotive audio applications, including telematics and e-call systems. The RTQ9124 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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<div class="spec-list"><ul class="lv1"><li>AEC-Q100 Qualified </li><li>I<sup>2</sup>S and TDM Input (Up to 16CH TDM) </li><li>1x27W, THD+N = 10%, 4Ω, 14.4V </li><li>THD+N is 0.05% </li><li>SNR up to 115dB </li><li>Ultra-Low Noise = 18μV </li><li>Switching Frequency up to 2.1MHz </li><li>Sampling Frequency from 8kHz to 192kHz </li><li>I<sup>2</sup>C Control with 4 Address Options </li><li>Built-In Anti-Pop Function </li><li>Built-In Thermal Fold-Back and Clip Detection </li><li>Ultra-Low Quiescent Mode (ULQM) </li><li>AC-DC Load Diagnostics </li><li>Real Time Load Diagnostics </li><li>Temperature and Voltage Sensing via I<sup>2</sup>C </li><li>Protection Features <ul class="lv2"> <li></li><li>Output Short-Circuit </li><li>Overvoltage and Undervoltage </li><li>Overcurrent Warning </li><li>Overcurrent </li><li>Over-Temperature </li><li>DC Detection </li><li>40V Load Dump </li></ul> </li><li>Ambient Temperature Range: -40°C to 125°C </li><li>Junction Temperature Range: -40°C to 150°C </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>e-Call Systems </li><li>Telematics </li><li>AVAS </li></ul></div>
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