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

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
  • I2 S 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 I2 C bus driving (3.3/1.8 V):
    • Channels independent tristate
    • Channel independent soft play/mute
    • I2 C 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


Publications and Collaterals

Description Version Size
FDA801 and FDA801B Full digital audio amplifiers for car infotainment systems 1.0 1 MB
Selection Guides
Description Version Size
Power amplifiers and voltage regulators 750 KB

Technical Documentation

Product Specifications
Description Version Size
DB2748 DB2748: 4 x 50 W class-D digital input power amplifier with I2C diagnostics and low voltage operation 1.0 244 KB
Support & Community

Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
FDA801-VYY Active - - LQFP Tray -40 105 NEC EAR99 - MORE INFO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
FDA801-VYY ActiveLQFPAutomotiveEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.