ST Life.augmented


4x50W low voltage operation PWM digital input power amplifier with I2C diagnostics
  • active Active

The FDA450LV is a new BCD- SOI (silicon on insulation) technology QUAD BRIDGE class D amplifier, specially intended for car radio 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 of the inductor and capacitor quality.

FDA450LV is fully configurable through I2C bus interface and integrates a full diagnostics array specially intended for automotive applications.

Thanks to the solutions implemented to solve the EMI problems, the device is conceived to be used in the standard single DIN car-radio box together with the tuner.

The possibility to parallelize the outputs allows to drive both 2 Ω and 1 Ω speakers.

Moreover FDA450LV is able to work with power supply as low as 6 V, thus supporting the most recent low voltage ('start-stop') car-makers specification.

pdf Please read
Errata Sheet
pdf Download
Data Brief

Key Features

  • Integrated 108 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
  • MOSFET power outputs
  • EMI control for FM/AM compatibility
  • EMI compliance at the CEI EN 55025 (2009-10)
  • Dithering possibility
  • Very low external component count filter
  • Output lowpass filter included in the feedback
  • Low radiation function (LRF)
  • Max. output power
  • 4 x 50 W/4 Ω @ 15.2 V, 1 kHz
  • High output power capability
  • 28 W/4 Ω 10 % THD, Vd = 14.4 V
  • Full I2C bus driving (3.3/1.8 V):
  • Independent front/rear soft play/ mute
  • I2C bus diagnostics (including DC and AC load detection, test signal internally generated)
  • Very flexible fault detection though integrated diagnostic
  • Offset detector (play or mute mode)
  • Four independent short circuit protection
  • Clipping detector
  • C-MOS compatible enable pin (3.3/5 V)
  • ESD protection
  • 6 V operation (“Start - Stop”)

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1996: 4 x 50 W PWM digital input power amplifier with built-in diagnostics features and low voltage operation
2.0 226 KB

Publications and Collaterals


Description Version Size
Car-audio power amplifiers
1.0 1,331 KB
FDA series
1.0 2,256 KB

Selection Guides

Description Version Size
Power amplifiers and voltage regulators
750 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
FDA450LVActiveTQFP 100 14x14x1.0Tray-4085Yes-9Distributor reported inventory date: 2015-11-25
Distributor NameRegionStockMin. order
FDA450LV-TActiveTQFP 100 14x14x1.0Tape And Reel-4085Yes-9No availability reported, please contact our Sales officeEcopack2PDF

(*) 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
(**) The Material Declaration forms available on 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.
Feedback Form
Customer Feedback