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The RT9121 is a high efficiency, I<sup>2</sup>S-input, stereo channel audio power amplifier delivering 2x30W into 8Ω BTL speaker loads. It can deliver over 94% power efficiency and eliminate the need for heat-sink.<br /><br />Built-in protection circuits can provide over-temperature, overcurrent, overvoltage, DC and undervoltage protections and report error status.<br /><br />The RT9121 is an I<sup>2</sup>S device receiving all clocks from external sources. It can support both master and slave mode with wide input sampling rate from 8kHz to 192kHz. A fully programmable data path routes these channels to the internal speaker drivers.<br /><br />The RT9121 features three band DRC and flexible multi-band biquads for anti-clipping, power limiting, and speaker equalization.
RT9121 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Flexible Power Supply Range <ul class="lv2"> <li></li><li>PVDD from 4.5V to 26.4V </li><li>DVDD and I/O, 1.8V or 3.3V </li></ul> </li><li>Support Wide Range Audio Format <ul class="lv2"> <li></li><li>Bit Resolution Up to 32 Bits </li><li>Support TDM Up to 32 Bit </li><li>Sampling Frequency from 8kHz to 192kHz </li></ul> </li><li>Excellent Audio Performance <ul class="lv2"> <li></li><li>2x30W at into 8Ω BTL at 24V </li><li>SNR ≥ 110dB </li><li>Efficiency ≥ 94% </li></ul> </li><li>Built-in Programmable DSP Function <ul class="lv2"> <li></li><li>40 Programmable Biquads for Speaker Equalization </li><li>Programmable Coefficients for DRC Filters and Supporting Multi-Compression Ratios </li><li>Programmable 256-taps FIR </li></ul> </li><li>Excellent Self-Protection <ul class="lv2"> <li></li><li>UVLO, OVP, OCP, thermal foldback, OTP and DCP </li><li>Built-In DC Blocking Filters </li></ul> </li><li>Filter-Less Application </li><li>Hifi-3 DSP Process, 160kB SRAM </li><li>Adjustable PWM frequency up to 1.5MHz </li><li>VQFN-48L Thermally-Enhanced Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT9121 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>LCD-TV </li><li>Monitors </li><li>Home Audio </li><li>Amusement Equipment </li><li>Electronic Music Equipment </li></ul></div>
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