TIDA-00733 Reference Design

Texas Instruments

Automotive 8 Channel Class D Amplifier with 2.1 MHz Switching Power Supply Reference Design


TIDA-00733 is a reference design for an eight-channel: Class-D amplifier that is capable of driving 2-Ω loads and an off-battery step-down power supply with 5-V and  3.3-V outputs. The amplifier design provides audio inputs for each audio channel. A  high-performance audio analog-to-digital converter (ADC) creates the digital data stream from the audio inputs and creates the digital timing for the system.

  • Operating voltage range: 4.5V to 18VWithstands transients to 40V2.1 MHz switching frequency for both power supply and Class D amplifiers45 watts per channel into 2 ohms at 10% total harmonic distortion plus noisePasses CISPR-25 Class 5 radiated emissions
  • Automotive external amplifier
  • Digital cockpit processing unit
  • Aftermarket head unit
  • Aftermarket audio amplifier
  • Virtual engine sound system (VESS)
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  • Audio