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RT9120M

2x20W, Inductor-Less I2S-input, Low Noise, High-Efficiency Closed-Loop General-Purpose Class-D Digital Audio Amplifier with DRC Control

RT9120M
New

The RT9120M is a high efficiency, I2S-input, stereo channel audio power amplifier delivering 2x20W into 8Ω BTL speaker loads. It can deliver over 92% power efficiency and eliminate the need for heat-sink.

The built-in anti-pop functions can reduce the speaker′s pop noise under all kind of scenarios. Built-in protection circuits can provide over-temperature, overcurrent, overvoltage, and undervoltage protections and report error status.

The RT9120M is a 3-wired device receiving all clocks from external sources with standard I2S, Left-justified, Right-justified and TDM formats. 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 RT9120M features one band DRC and flexible input mixer, and power limiting.

Applications

  • LCD-TV
  • Monitors
  • Home Audio
  • Amusement Equipment
  • Electronic Music Equipment

Key Spec.

RT9120M
Status Active
Output Channels 2
Vin (min) (V) 4.5
Vin (max) (V) 26.4
Pout @THD+N=10% (W) 9
Pout @THD+N=1% (W) 6.5
SNR (dB) 106
Amplifier Type Class-D
Features OCP;OTP;UVP;UVP
Package Type VQFN5x5-32

Features

  • Wide Input Supply Range: 4.5V to 26.4V

  • Support 1.8V, 3.3V I/O

  • I2S, LJ, RJ, TDM Digital Audio Interface

  • 2x20W at into 8Ω BTL at 20V

  • 2x9W at into 8Ω BTL at 12V

  • SNR Up to 108dB

  • THD + N is 0.03% at 1W

  • 45μV Noise Floor

  • Efficiency Up to 92% at 2x10W for 8Ω

  • Sampling Frequency from 8kHz to 192kHz

  • Built-In Anti-Pop Function for BTL BD Modulations

  • Flexible Input Mixer

  • Programmable Coefficients for DRC Filters and Supporting Multi-Compression Ratios

  • Built-In DC Blocking Filters

  • Built-in Thermal Fold Back Control

  • Protection Features: UVLO, OVP, OCP, OTP and DCP

  • Filter-Less Application

  • VQFN-32L Thermally-Enhanced Package

  • RoHS Compliant and Halogen Free

Application Notes

Datasheet

DS9120M-00.pdf

Datasheet

DS9120M-00.pdf

Contact us for more information