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The RT9121S is a high-efficiency, I2S-input, stereo channel audio power amplifier delivering 2x30W into 8Ω 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 I2S 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°C to 150°C, and the ambient temperature range is -40°C to 85°C.

Applications

  • LCD-TVs
  • Monitors
  • Home Audio
  • Amusement Equipment
  • Electronic Music Equipment
Key Spec.
RT9121S
Status Active
Output Channels 2
Vin (min) (V) 4.5
Vin (max) (V) 26.4
Pout @THD+N=10% (W) 38
Pout @THD+N=1% (W) 30
SNR (dB) 110
Amplifier Type Class-D
Features OCP;OTP;OVP;UVLO
Package Type VQFN6x6-48
Features
  • 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
Please confirm with our distributor or sales representative for actual stock status.
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