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The RT5509 is a mono BTL class-D amplifier with cutting-edge speaker protection algorithm. Also, a built-in DC-DC step-up converter is used to provide efficient power for class-D amplifier. I2S interface supports two different audio sources while a pair of auxiliary DATAI/O is used for stereo mode or pass-through application. Chip information including gain, speaker protection output or current sense is able to be monitored via DATAO through proper register setting. Speaker protection provides mechanical / thermal protection with accuracy of 10%/±10ºC of rated limit.
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  • Class-D Speaker AMP
    ► 4.3W Output Power @ 9.5V, 8Ω Load, THD < 1%
    ► 0/3/6/9/12/15/18dB Boost Gain
    ► 20μV Output Noise @ 0dB Gain
  • Boost Converter
    ► Adaptive Boost for Speaker, Boost from Battery Supply Up to Programmed Voltage, Max 9.5V
    ► Power Modes : Adaptive Boost, Fixed Boost, Bypass Mode
    ► Switching Frequency 2MHz, Maximum Output Current 1.5A
    ► Support CCM / DCM Compensation, Feedback AD
    ► Digital Part : Voltage Loop in Boost Mode
  • Digital
    ► Digital Audio Interface Support I2S, Left-Justified, Right-Justified
    ► I2S Sampling Rate Support Up to 48kHz, 24-bit
    ► Digital Filter, Digital Volume, DRC/Noise Gate
    ► Speaker Protection
    ► Speaker Amplitude Estimation Accuracy : Error < 10%
    ► Bl Calibration Function
    ► Temperature Sensing
    ► Speaker Temperature Estimation Accuracy : Error < ±10ºC
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Smart Phone<br />Tablet
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Keyword 1

Keyword 2

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