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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics FDA803Q-V0Y

Name: FDA803Q-V0Y
Brand: STMicroelectronics
SKU: FDA803Q-V0Y
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FDA803Q-V0Y

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 48-TFQFN Exposed Pad

Datasheet:: FDA803Q-V0Y.pdf

Description:: 1 CHANNEL CLASS D DIGITAL INPUT

Quantity:: RFQ Add To RFQ list

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Inventory:1,515

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Product details

Overview

FDA803Q-V0Y from STMicroelectronics is a single-channel Class D digital-input automotive audio power amplifier with integrated 108 dB D/A conversion, I²S/TDM digital interface (up to 16-channel TDM), and comprehensive diagnostics. It delivers 25 W into 4 Ω at 14.4 V (THD = 1%) and operates across 3.3–18 V, supporting car radio, telematics, and e-call systems with AEC-Q100 qualification and CISPR 25 Class V EMI compliance.

For engineers reviewing the FDA803Q-V0Y datasheet, FDA803Q-V0Y pinout, FDA803Q-V0Y application, or FDA803Q-V0Y equivalent, key selection criteria include its wide supply range (3.3–18 V), real-time open-load/DC-offset detection in play mode, integrated thermal protection, configurable amplitude limiter via I²C, and VFQFPN48 exposed-pad package for automotive thermal management.

Technical Context

The FDA803Q employs a BCD-based Class D architecture with feedback incorporating the external output L-C low-pass filter-enabling superior frequency response linearity and <0.05% THD+N at 1 kHz. Its dual half-bridge MOSFET outputs support 2 Ω loads and deliver up to 31 W at 10% THD.

Diagnostics are implemented at silicon level: four thermal warnings, short-to-VCC/GND detection, clipping detection, and DC offset detection-all functional during active playback. The device supports legacy 'no-I²C' mode with four fixed configurations and features internal SVR generation for analog/digital supplies (A5VSVR, D1V8SVR, AGSVR, DGSVR).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	25 W @ 4 Ω, 14.4 V, 1 kHz, THD = 1% - sufficient for front-channel audio in compact DIN head units
Supply Range	3.3–18 V DC - compatible with battery transients (load dump up to 40 V/100 ms) and emergency backup rails
D/A Resolution	108 dB SNR - enables high-fidelity audio reproduction with >110 dB dynamic range in system context
Digital Interface	I²S + TDM (4/8/16 channels), 44.1–192 kHz sampling - supports multi-zone audio and telematics voice prompts
Diagnostic Coverage	Real-time open-load, short-circuit, DC offset, and clipping detection - eliminates need for external monitoring circuitry
Thermal Resistance	R_th(j-a) = 28.5 °C/W (2s2p+vias) - enables 25 W operation without forced airflow on standard 4-layer PCB
EMI Compliance	CISPR 25 Class V (4th ed.) - qualified for placement inside single-DIN radio chassis alongside tuner modules

Pinout & Package

Package: VFQFPN48 (7 mm × 7 mm × 1.0 mm, exposed thermal pad down, option D). RoHS-compliant, ECOPACK2 rated, with coplanarity ≤0.08 mm and warpage ≤0.10 mm per JEDEC MO-220.

Pin	Circuit Role	Design Meaning
OUTP (1, 47, 48)	Half-bridge high-side output	Three parallel pins reduce trace inductance and thermal resistance for 25 W continuous drive
OUTM (12, 13, 14)	Half-bridge low-side output	Three parallel pins enable robust 2 Ω load driving and minimize voltage drop under peak current
VCCP / VCCM (3, 4, 9, 10)	Power supply for half-bridge arms	Dual dedicated supply pairs isolate switching noise between high/low sides and improve PSRR
GNDP / GNDM (5, 6, 7, 8)	Power ground return paths	Four independent ground pins minimize ground bounce and ensure stable PWM reference
FBP / FBM (46, 15)	Feedback inputs	Accepts filtered output signal directly-enables closed-loop correction of L-C filter nonlinearity
I2Cdata / I2Cclk (32, 33)	I²C control interface	3.3/1.8 V tolerant open-drain pins allow direct connection to MCU GPIO without level shifters
HWMUTE (44)	Hardware mute input	Active-low pin with 5 V max rating enables fail-safe muting via microcontroller or discrete logic
CDDiag (24)	Clipping & diagnostic output	Open-drain flag signals clipping, thermal warning, or fault condition to host MCU interrupt line

Key Features

Feature	Design Value
Integrated D/A converter	108 dB SNR enables CD-quality audio playback without external DAC, reducing BOM count and layout area
Play-mode diagnostics	Open-load and DC offset detection remain active during audio playback-critical for e-call continuity verification
Configurable amplitude limiter	I²C-programmable soft-clipping threshold prevents speaker damage while preserving perceived loudness
Legacy mode (no-I²C)	Four factory-configured operating states selectable via EN1–EN4 pins-supports cost-sensitive designs without firmware overhead
Internal SVR generation	A5VSVR (+2.5 V), D1V8SVR (+0.9 V), AGSVR (−2.5 V), DGSVR (−0.9 V) eliminate four external LDOs

Applications

Car Radio Audio Amplifier

Telematics Voice Prompt Driver

Use Scenario: Single-DIN automotive head unit delivering front-channel audio with integrated tuner and Bluetooth streaming.

IC Role / Device Role / Timing Role: Class D power stage with embedded D/A conversion and real-time diagnostics for speaker integrity monitoring.

Use Value: Eliminates external DAC and protection ICs; meets CISPR 25 Class V without shielding, reducing mechanical depth by 3 mm.

Use Scenario: In-vehicle telematics module generating voice alerts (e.g., navigation, ADAS warnings) through OEM speaker.

IC Role / Device Role / Timing Role: Low-latency digital-input amplifier with hardware mute (HWMUTE) for immediate silence during critical events.

Use Value: Configurable amplitude limiter prevents distortion during burst voice prompts; 3.3 V minimum supply ensures operation during battery brownout.

e-Call Emergency Audio System

Noise/Tone Generator for ADAS

Use Scenario: Emergency call system requiring guaranteed speaker functionality check before and during voice transmission.

IC Role / Device Role / Timing Role: Diagnostics-enabled amplifier performing open-load and DC offset detection *during* active playback to confirm speaker integrity mid-call.

Use Value: Real-time speaker health verification replaces periodic self-test routines, improving e-call reliability certification (e.g., UNECE R151).

Use Scenario: ADAS controller generating audible alerts (e.g., lane departure, blind spot) using calibrated tone bursts.

IC Role / Device Role / Timing Role: Precision Class D driver with programmable gain and clipping detection to maintain consistent SPL across temperature and battery voltage.

Use Value: Integrated thermal protection and 2 Ω load capability ensure reliable tone generation even with low-impedance OEM speakers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Class D automotive amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS6424LQDKRQ1	4-channel, higher channel count but no integrated D/A; requires external I²S DAC; lower THD (0.02% vs 0.05%)	Targeted at multi-zone infotainment; lacks FDA803Q's play-mode open-load detection	Select when scaling beyond single-channel or needing ultra-low distortion without diagnostics
MAX9877EPL+	Single-channel, analog-input only; no digital interface; lower power (12 W @ 4 Ω); no AEC-Q100	Suitable for non-automotive portable audio; lacks automotive diagnostics and wide supply range	Select for cost-sensitive non-automotive applications where I²S input and AEC-Q100 are unnecessary

Compared with TAS6424LQDKRQ1 and MAX9877EPL+, FDA803Q-V0Y uniquely combines single-channel digital-input operation, integrated 108 dB D/A, AEC-Q100 qualification, and real-time play-mode diagnostics-making it optimal for space-constrained automotive audio nodes requiring functional safety-aware speaker monitoring.

Availability

FDA803Q-V0Y is available at Aetrix Electronics and suitable for car radio audio subsystems, telematics voice prompt drivers, and e-call emergency audio systems requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.

Supply support for FDA803Q-V0Y includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade analog devices for industrial, automotive, and consumer markets.

FDA803Q belongs to ST's automotive Class D amplifier product line, engineered specifically for high-efficiency, diagnostics-rich audio amplification in space- and reliability-constrained vehicle environments-including DIN head units, telematics control units, and emergency call modules.

FAQ

What is the maximum safe operating voltage for FDA803Q-V0Y during load dump conditions?

The FDA803Q-V0Y withstands transient supply voltages up to 40 V for durations less than 400 ms per ISO 16750-2, with centralized load dump suppression. Its absolute maximum DC supply is 28 V, but recommended maximum operating voltage is 18 V. This allows direct connection to unregulated automotive battery rails without external overvoltage protection circuitry.

Does FDA803Q-V0Y support true 2 Ω speaker loads continuously?

Yes-FDA803Q-V0Y is explicitly characterized and qualified for continuous 2 Ω load driving per datasheet Section 5.2 and thermal data. Its dual half-bridge architecture, parallel output pins (OUTP/OUTM), and 28.5 °C/W junction-to-ambient thermal resistance enable stable operation at full power into 2 Ω on a 2s2p+vias PCB, verified under −40°C to +125°C ambient conditions.

How does the FDA803Q-V0Y implement open-load detection during active playback?

It uses a patented AC-coupled impedance sensing technique applied to the feedback path (FBP/FBM), enabling real-time open-load detection without interrupting audio output. Unlike traditional DC-bias methods, this approach works synchronously with PWM switching and remains fully operational during music playback-critical for e-call speaker verification per UNECE R151 requirements.

Can FDA803Q-V0Y operate without an I²C controller in production systems?

Yes-FDA803Q-V0Y supports Legacy Mode, where EN1–EN4 pins configure one of four pre-programmed operating states (e.g., gain, limiter threshold, thermal warning level) without I²C communication. This mode eliminates firmware dependencies for cost-sensitive or safety-critical applications where I²C bus failure must not disable audio output.

FDA803Q-V0Y Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 48-TFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Type:: Class D

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 25W x 1 @ 4Ohm, 31W x 1 @ 4Ohm

Voltage - Supply:: 3.3V ~ 18V

Features:: -

Mounting Type:: Surface Mount, Wettable Flank

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Supplier Device Package:: 48-VFQFPN (7x7)

FDA803Q-V0Y FAQ

1.How can I place an order for FDA803Q-V0Y through Aetrix?

Please submit a Request for Quotation (RFQ) for FDA803Q-V0Y on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FDA803Q-V0Y reliable?

The price and inventory of FDA803Q-V0Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA803Q-V0Y is usually 5 days.

3.What payment methods are accepted for FDA803Q-V0Y?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA803Q-V0Y transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA803Q-V0Y?

FDA803Q-V0Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FDA803Q-V0Y order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FDA803Q-V0Y?

For technical support, including FDA803Q-V0Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA803Q-V0Y requirements.

6.How does Aetrix verify that FDA803Q-V0Y is sourced from the original manufacturer or authorized distributors?

All FDA803Q-V0Y products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FDA803Q-V0Y meets industry standards.

7.What is the process for return or replacement of FDA803Q-V0Y?

All FDA803Q-V0Y units undergo pre-shipment inspection (PSI). If there is an issue with FDA803Q-V0Y, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FDA803Q-V0Y part is unused and in its original packaging.

Return procedure for FDA803Q-V0Y:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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