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


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

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
Support & Community

Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
FDA801-VYY Active - - LQFP Tray NEC EAR99 - MORE INFO No availability reported, please contact our Sales office

(*) 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.