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<!-- Paste General Description -->The RTQ9128DH-QA is an ultra-low output noise, high- efficiency, four-channel class-D audio power amplifier. It delivers 4x75W into 4Ω at 10% THD+N from a 25V supply in automotive applications. It can achieve over 87% power efficiency with an output switching frequency of up to 2.1MHz for clarity, which enables a cost-optimized solution in a very small PCB size. Additionally, the RTQ9128DH-QA can be set either above the AM band, which eliminates the AM-band interference and reduces output filter size and cost, or below the AM band to optimize efficiency.The RTQ9128DH-QA is fully configurable through the I<SUP>2</SUP>C bus interface and features comprehensive diagnostics array specially designed for automotive applications.The built-in anti-pop functions can reduce the speaker’s pop noise under all kinds of scenarios. Its built-in protection circuits provide thermal fold-back, over-temperature, overcurrent, overvoltage, and undervoltage protections and report error status.The RTQ9128DH-QA is a 3-wire device that receives all clocks from external sources with standard I<SUP>2</SUP>S and TDM (Time-Division Multiplexing) formats. It supports a wide range of input sampling rates from 32kHz to 192kHz. The device is offered in a 64-pin RLQFP package with the exposed thermal pad facing up.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 Grade 1 Qualified<br> </li><li class="mv5"> I<SUP>2</SUP>S and TDM Input<br> </li><li class="mv5"> 4x22W, THD + N = 1%, 4Ω, 14.4V<br> </li><li class="mv5"> 4x27W, THD + N = 10%, 4Ω, 14.4V<br> </li><li class="mv5"> 4x45W, THD + N = 10%, 2Ω, 14.4V<br> </li><li class="mv5"> 4x75W, THD + N = 10%, 4Ω, 25V<br> </li><li class="mv5"> THD + N is 0.03%<br> </li><li class="mv5"> SNR up to 115dB<br> </li><li class="mv5"> Ultra-Low Quiescent Current Mode<br> </li><li class="mv5"> Ultra-Low Noise = 18μV<br> </li><li class="mv5"> Low R<SUB>DS_ON</SUB> (80mΩ)<br> </li><li class="mv5"> Switching Frequency up to 2.1MHz<br> </li><li class="mv5"> Sampling Frequency from 32kHz to 192kHz<br> </li><li class="mv5"> I<SUP>2</SUP>C Control with 16 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"> Load Diagnostics<br> ► Output Open Load and Short Load<br> ► Output Short to Ground or Power<br> ► DC and AC Coupled Load Detection<br> </li><li class="mv5"> Protection Features<br> ► Output Short-Circuit <br> ► Overvoltage and Undervoltage<br> ► Output Current Limit and Protection<br> ► Over-Temperature<br> ► DC Offset 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"> Automotive Head Units<br> </li><li class="mv5"> In-Vehicle Infotainment<br> </li><li class="mv5"> Automotive External Amplifier Modules</li>
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