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STMicroelectronics TDA7901 Automotive Quad Power Amplifiers

STMicroelectronics TDA7901 Automotive Quad Power Amplifiers are single-chip quad-bridge amplifiers with advanced BCD technology integrating a full D/A converter, digital input for direct connection to I2S (or TDM), and powerful MOSFET output stages. The integrated D/A converter allows performance to reach a 117dB S/N ratio with more than 117dB of dynamic range. The TDA7901 incorporates an innovative high-efficiency concept optimized for uncorrelated music signals. The TDA7901 implements class G operation mode. Class G operation mode allows the dissipated “output power” under average listening conditions to be reduced more than the standard class AB devices. These amplifiers also integrate a programmable PLL that can lock at the input frequencies of 64*Fs for all the input configurations.

The TDA7901 amplifier is equipped with a full, advanced diagnostics array that communicates the status of each speaker through the I2C bus. DIM (Digital-Impedance-Meter) function allows users to measure the value of the load. The same I2C bus enables control of several configurations of the device. The TDA7901 can play music down to a 4.5V supply voltage and is compatible with the 'start stop' battery profile. Several carmakers adopt the 'Start stop' feature to reduce fuel consumption and the impact on the environment. The STMicroelectronics TDA7901 Automotive Quad Power Amplifier also guarantees outstanding EMI performance, in line with the CISPR25-restrictive standard requirement.

Features

  • AEC-Q100 qualification ongoing
  • 24-bit resolution
  • High-resolution bandwidth support
    • Up to 40kHz (I2S 96kHz) with attenuation [0dB, -2dB]
    • Up to 80kHz (I2S 192kHz) with attenuation [0dB, -2dB]
  • 117dB dynamic range (A-weighted)
  • Real-time load current monitoring
  • Voltage monitoring feature on I2C
  • High-efficiency SB-I (SB-Improved) and Class-G operation
  • 1Ω driving capability
  • High output power capability
    • 4x 27W 4Ω at 14.4V, 1kHz, THD = 10%
    • 4x 47W 2Ω at 14.4V, 1kHz, THD = 10%
  • EMI compliance evaluated following normative CISPR25
  • Start-stop compatibility (operation down to 4.5V)
  • Thermal protection
  • Sample rates of 44.1kHz, 48kHz, 96kHz, and 192kHz
  • Flexible mode control
    • Full I2C bus driving (1.8V/3.3V) with eight addresses selectable
    • Independent front/rear play/mute
    • Selectable digital gains
    • Very low noise
    • Digital diagnostic with DC and AC load detections
    • Digital diagnostic with OL and OD in play
    • Current offset detection
  • Flexible serial data port (1.8V/3.3V), I2S standard, TDM 4Ch, TDM 8Ch, TDM 16Ch
  • Output voltage offset detector
  • Independent front/rear clipping detector
  • Programmable diagnostic pin
  • CMOS compatible enable pin
  • Pop free in mute to play transitions and vice versa

Applications

  • Automotive audio systems
  • Infotainment systems
  • Telematics
  • Start-stop systems

Block Diagram

Block Diagram - STMicroelectronics TDA7901 Automotive Quad Power Amplifiers

Additional Resources

Published: 2565-04-13 | Updated: 2568-05-08