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4x50 W class-D digital input power amplifier with I2C diagnostics and low voltage operation

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Parameter NameParameter Value
Supply Voltage Min Volt6.0
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius105.0
Packing TypeTray
RoHs compliantEcopack2
Package NameLQFP

FDA801 is a new BCD technology quad BRIDGE class D amplifier, specially intended for automotive applications.

Thanks to the technology used, it is possible to integrate a high performance D/A converter together with powerful MOSFET outputs in class D, to get an outstanding efficiency compared with the standard class AB.

The integrated D/A converter allows to reach outstanding performances (110 dB S/N ratio with 108 dB of dynamic range). The feedback loop includes the output L-C low-pass filter, allowing superior frequency response linearity and lower distortion independently from the inductor and capacitor quality.

FDA801 is fully configurable through I2C bus interface and integrates a full diagnostics array specially intended for automotive applications. Thanks to the solutions implemented to contain EMI emissions, the device is intended to be used in the standard single DIN car-radio box together with the tuner.

Moreover FDA801 is able to work with power supply as low as 6 V, thus supporting the most recent low voltage ('start-stop') car-makers specification.

Key features
  • Integrated 110 dB D/A conversion
  • I2S and TDM digital input (3.3/1.8 V)
  • Input sampling frequency: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz
  • Class-D channels with 93% efficiency
  • EMI control for AM compatibility
  • EMI compliance evaluated following normative IEC61967-4 and IEC62132-4
  • Low radiation function (LRF)
  • Idle tones free DAC
  • Output lowpass filter included in the feedback allowing lower cost filter components
  • Max. output power
  • High output power capability
  • Full I2C bus driving (3.3/1.8 V):
    • Channels independent tristate
    • Channel independent soft play/mute
    • I2C bus diagnostics, including DC and AC load detection
  • Integrated fault protection
  • Input and output offset detector
  • Clipping detector
  • ESD protection
  • 6 V operation (“Start - Stop” engines compatibility)
  • 2 and 1 Ω load driving capability