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The RT9121S is a high-efficiency, I<sup>2</sup>S-input, stereo channel audio power amplifier delivering 2x30W into 8&Omega; BTL (Bridge Tied Load) speaker loads. It can deliver over 94% power efficiency and eliminate the need for heat-sink.Built-in protection circuits provide over-temperature, overcurrent, overvoltage, DC and undervoltage protections, and report error status.The RT9121S 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.The RT9121S features three band DRC (Dynamic Range Compression) and flexible multi-band biquads for anti-clipping, power limiting, and speaker equalization.The recommended junction temperature range is -40&deg;C to 150&deg;C, and the ambient temperature range is -40&deg;C to 85&deg;C.
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productFeature
  • Flexible Power Supply Range
    - PVDD from 4.5V to 26.4V
    - DVDD and I/O, 1.8V or 3.3V
  • Support Wide Range Audio Format
    - Bit Resolution up to 32 Bits
    - Support TDM (Time-Division Multiplexing) up to 32 Bits
    - Sampling Frequency from 8kHz to 192kHz
  • Excellent Audio Performance
    - 2x30W into 8Ω BTL at 24V
    - SNR ≥ 110dB
    - Efficiency ≥ 94%
  • Built-In Programmable DSP (Digital Signal Processor) Function
    - 40 Programmable Biquads for Speaker Equalization
    - Programmable Coefficients for DRC Filters and Supporting Multi-Compression Ratios
    - Programmable 256-Tap FIR
  • Excellent Self-Protection
    - UVLO, OVP, OCP, Thermal Foldback, OTP, and DCP
    - Built-In DC Blocking Filters
  • Filter-Less Application
  • HiFi-3 DSP Process, 160kB SRAM
  • Adjustable PWM Frequency up to 1.5MHz
  • VQFN-48L Thermally Enhanced Package
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LCD-TVs<br />Monitors<br />Home Audio<br />Amusement Equipment<br />Electronic Music Equipment
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