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The RT9123 is a mono Class-D amplifier that features high efficiency and performance. In addition to I2C control, the RT9123 also features a "HW Control Mode" selection for the I2S/TDM interface. This mode simplifies the amplifier driver, as it does not require I2C commands to turn on or off the device. The digital audio interface supports various formats, including I2S, left justified, right justified, and 8-channel time division multiplexed (TDM) formats.
The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.

Applications

  • Smartphones, Tablets
  • Personal Media Players/Portable TVs
  • Game Players/Cameras
Key Spec.
RT9123
Status Active
Output Channels 1
Vin (min) (V) 2.5
Vin (max) (V) 5.5
Pout @THD+N=10% (W) 3.2
Pout @THD+N=1% (W) 2.8
SNR (dB) 120
Amplifier Type Class-D
Package Type WDFN3x3-12
Features
  • Class-D Speaker AMP
    ► 3.2W Output Power @ 4Ω Load, THD < 10%
    ► 8μV Output Noise
    ► Low Shutdown Current
    ► Add DRE to Reduce Output Noise
    ► Spread Spectrum Frequency
    ► Fast Turn-On Time: 1ms
    ► Support HW Control Mode without Driver and I2C Controlled
    ► Silence Data Detection
    ► Beep Function
  • Audio Interface
    ► Digital Audio Interface Support I2S, Left-Justified, Right-Justified, TDM
    ► Support 8/16/20/24/32 Bit Data Length and 8kHz to 96kHz Sample Rate
  • Digital
    ► Volume Control
    ► Clipping Reduce Gain Control
  • Protection
    ► OCP: Detects High Current Levels to Disable the Analog Blocks for 100ms
    ► VDD UVP: Disables the Analog Blocks when the Battery Voltage Falls Below 2.2V
    ► VDD18 UVP: Disables the Analog Blocks when the Battery Voltage Falls Below 1.4V
    ► OTP: Disables the Analog Block when the IC Temperature Exceeds 150°C
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT9123GQW-2C WDFN3x3-123,000 Request Digikey 2,937 Buy
Mouser 0 Lead-Time: 14 weeks
Please confirm with our distributor or sales representative for actual stock status.
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