Richtek USA Inc

RT9120S Series Class-D Audio Amplifier with DRC Control

Richtek's RT9120S series are 30 W stereo, ultra-low noise, inductor-less, I²S Class-D audio amplifiers with DRC control

Image of Richtek's RT9120S Series Class-D Audio Amplifier with DRC ControlRichtek's RT9120S is a high efficiency, I2S-input, stereo channel audio power amplifier delivering maximum 2 x 30 W into 8 Ω BTL speaker loads. It can deliver over 94% power efficiency at 2 x 10 W and eliminate the need for a heatsink.

The built-in anti-pop functions can reduce the speaker's pop noise in various scenarios. Built-in protection circuits can provide overtemperature, overcurrent, overvoltage, and undervoltage protections and report error status.

The RT9120S is a 3-wired device receiving all clocks from external sources with standard I2S, left-justified, right-justified, or TDM formats. It can support a wide input sampling rate from 8 kHz to 192 kHz.

The RT9120S features one band DRC and flexible input mixer, and power clipping.

Features
  • Wide input supply range: 4.5 V to 26.4 V
  • Support 1.8 V, 3.3 V I/O
  • Configurable 4 different IC secondary addresses
  • 1 x 53 W, 1.0 mode (4 Ω, 22 V, THD + N = 1%)
  • 2 x 30 W, 2.0 mode (8 Ω, 24 V, THD + N = 1%)
  • SNR up to 113 dB
  • THD + N is 0.03% at 1 W
  • 35 µV noise floor
  • Efficiency up to 94% at 2 x 10 W for 8 Ω
  • RDS(ON) low to 90 mΩ
  • PWM switching frequency up to 1.536 MHz
  • Sampling frequency from 8 kHz to 192 kHz
  • Support TDM format for multi-channel
  • Built-in anti-pop function
  • Programmable coefficients for DRC filters
  • Built-in DC blocking filters
  • Built-in thermal foldback control
  • Protection features: UVLO, OVP, OCP, OTP, and DCP
  • Inductorless application
  • VQFN-32L thermally enhanced package
  • RoHS compliant and halogen-free
Applications
  • LCDs, TVs
  • Monitors
  • Home audio
  • Amusement equipment
  • Electronic music equipment
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    Image of Richtek's RT9120S Series Class-D Audio Amplifier with DRC Control 

RT9120S Series Class-D Audio Amplifier with DRC Control

ImageManufacturer Part NumberDescriptionTypeOutput TypeAvailable QuantityPriceView Details
IC AMP CLASS D STEREO 30W 32VQFNRT9120SGQVIC AMP CLASS D STEREO 30W 32VQFNClass D2-Channel (Stereo)1589 - Immediate$27.00View Details

Evaluation Board

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
EVAL BOARD FOR RT9120SEVB_RT9120SGQVEVAL BOARD FOR RT9120S4 - Immediate$575.50View Details
Published: 2023-09-11