FDA801B

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

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FDA801B 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.

FDA801B 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 FDA801B 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
- 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):
- Channels independent tristate
- Channel independent soft play/mute
- I²C bus diagnostics , including DC and AC load detection and load value recognition (DIM)
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

Resources

Technical Documentation

Product Specifications

	Description	Version	Size
	DB2749: 4 x 50 W class-D digital input power amplifier with I2C diagnostics, digital impedance meter (DIM) and low voltage operation	1.0	244 KB

Publications and Collaterals

Flyers

	Description	Version	Size
	FDA Family – Full digital audio amplifiers for car infotainment systems	1.0	911 KB
	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

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Sample & Buy

Part Number	Marketing Status	Quantity	Unit Price (US$) *	Package	Packing Type	ECCN (US)	Country of Origin	More info	Order from Distributors
FDA801B-VYY	Active : Product is in volume production	1000	8.5	LQFP	Tray	EAR99	MALAYSIA	MORE INFO	No availability reported, please contact our Sales office
FDA801B-VYT	Active : Product is in volume production	1000	8.5	LQFP	Tape And Reel	EAR99	MALAYSIA	MORE INFO	No availability reported, please contact our Sales office
FDA801SB	Proposal : Marketing proposal for customer feedback. No commitment taken to design or produce	-	-	LQFP 64 10x10x1.4	-	-	-	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
FDA801B-VYY	Active	LQFP	Automotive	Ecopack2
FDA801B-VYT	Active	LQFP	Automotive	Ecopack2
FDA801SB	Proposal	LQFP 64 10x10x1.4	Industrial	-

(**) 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.