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<!-- Paste General Description --><p align="justify">The RT5509 is a mono BTL class-D amplifier with cutting-edge speaker protection algorithm. Also, a built-in DC-DC step-up converter is used to provide efficient power for class-D amplifier. I<sup>2</sup>S interface supports two different audio sources while a pair of auxiliary DATAI/O is used for stereo mode or pass-through application. Chip information including gain, speaker protection output or current sense is able to be monitored via DATAO through proper register setting. Speaker protection provides mechanical / thermal protection with accuracy of 10%/±10ºC of rated limit.</p>
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<li class="mv5"> Class-D Speaker AMP<br />► 4.3W Output Power @ 9.5V, 8Ω Load, THD < 1%<br />► 0/3/6/9/12/15/18dB Boost Gain<br />► 20μV Output Noise @ 0dB Gain<br /></li><li class="mv5"> Boost Converter<br />► Adaptive Boost for Speaker, Boost from Battery Supply Up to Programmed Voltage, Max 9.5V<br />► Power Modes : Adaptive Boost, Fixed Boost, Bypass Mode<br />► Switching Frequency 2MHz, Maximum Output Current 1.5A<br />► Support CCM / DCM Compensation, Feedback AD<br />► Digital Part : Voltage Loop in Boost Mode<br /></li><li class="mv5"> Digital<br />► Digital Audio Interface Support I<sup>2</sup>S, Left-Justified, Right-Justified<br />► I<sup>2</sup>S Sampling Rate Support Up to 48kHz, 24-bit<br />► Digital Filter, Digital Volume, DRC/Noise Gate<br />► Speaker Protection<br />► Speaker Amplitude Estimation Accuracy : Error < 10% <br />► Bl Calibration Function<br />► Temperature Sensing<br />► Speaker Temperature Estimation Accuracy : Error < ±10ºC</li>
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<li class="mv5"> Smart Phone<br /></li><li class="mv5"> Tablet</li>
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