Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics FDA801-VYY

Name: FDA801-VYY
Brand: STMicroelectronics
SKU: FDA801-VYY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: FDA801-VYY

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 64-LQFP Exposed Pad

Datasheet:: FDA801-VYY.pdf

Description:: IC AMP CLASS D QUAD 50W 64LQFP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,514

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

FDA801-VYY from STMicroelectronics is a quad-channel Class-D digital input audio power amplifier designed for automotive infotainment systems. It delivers 4 × 50 W into 4 Ω at 15.2 V, integrates a 24-bit DAC with 110 dB SNR, supports I2S/TDM digital inputs up to 192 kHz, and operates down to 6 V for start-stop engine compatibility.

For engineers reviewing the FDA801-VYY datasheet, FDA801-VYY pinout, FDA801-VYY application, or FDA801-VYY equivalent, key selection criteria include its integrated diagnostics (clipping, offset, thermal), EMI-compliant low-radiation operation per IEC61967-4/IEC62132-4, independent channel mute/play control via I²C, and LQFP64 exposed-pad package thermal performance.

Technical Context

The FDA801-VYY implements a fully digital architecture with on-chip 24-bit interpolation and noise shaping, enabling high-fidelity audio without external DACs. Its feedback loop includes the output LC filter, eliminating sensitivity to component tolerances and ensuring consistent frequency response linearity across production units.

It features four independent half-bridge Class-D channels driven by internal charge pumps, each with dedicated enable pins and configurable I²C diagnostics including DC/AC load detection, overcurrent, and thermal warning. The device uses BCD technology to co-integrate high-voltage MOSFETs and precision analog/digital circuitry on a single die.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 50 W @ 4 Ω, 15.2 V, 1 kHz - enables full-range speaker drive in compact DIN head units
DAC Performance	110 dB SNR, 108 dB dynamic range - meets Hi-Fi audio requirements without external DAC
Digital Input	I2S/TDM, 3.3/1.8 V logic, 44.1–192 kHz sampling - supports modern DSP-based audio sources
Efficiency	93% typical at full load - reduces thermal load and heatsink size in sealed enclosures
EMI Compliance	Tested per IEC61967-4 & IEC62132-4 - allows direct integration near AM radio tuners
Supply Range	6–18 V - supports automotive start-stop systems and brown-out resilience
Protection Features	Integrated clipping detector, offset monitor, thermal warning, overcurrent, ESD - eliminates need for discrete fault-sensing circuitry

Pinout & Package

LQFP64 (10 × 10 × 1.4 mm, exposed pad up) with thermal slug (Pin 49, TAB) for enhanced heat dissipation in automotive under-dash environments.

Pin/Terminal	Circuit Role	Design Meaning
OUT1+/OUT1−, OUT2+/OUT2−, etc.	Half-bridge output terminals (4 channels)	Direct connection to speaker loads; differential outputs reduce common-mode EMI
FB1+/FB1−, FB2+/FB2−, etc.	Channel-specific feedback inputs	Enables closed-loop correction inside LC filter - improves THD+N and stability
ENABLE 1–3, HWMute	Independent channel enable & hardware mute	Allows staggered startup, channel muting without I²C traffic, and fail-safe silence
I2Cclk / I2Cdata	I²C interface for configuration & diagnostics	Supports 3.3/1.8 V levels; enables real-time fault reporting and register readback
CD/Diag	Open-drain diagnostic output	Combines clipping, thermal warning, and offset detection into one pin for MCU interrupt
TAB (Pin 49)	Thermal slug / power ground reference	Must be soldered to PCB copper pour for thermal management and low-impedance return path

Key Features

Feature	Design Value
Integrated 24-bit DAC + interpolation	Eliminates external DAC and associated layout complexity while achieving 110 dB SNR
Feedback-in-loop LC filter	Removes sensitivity to inductor/capacitor tolerance - ensures consistent THD+N < 0.05% across batches
Low Radiation Function (LRF)	Reduces radiated emissions by >10 dB in AM band (530–1710 kHz), enabling tuner co-location
Per-channel I²C controllable mute/play	Enables software-defined audio routing and dynamic channel disabling without hardware changes
Start-stop compatible 6 V operation	Guarantees functional audio during cranking events where battery dips to 6 V

Applications

Automotive Head Unit

Aftermarket Infotainment

Use Scenario: Integrated amplifier in single-DIN car stereo with digital audio source (DSP or SoC).

IC Role / Device Role / Timing Role: Quad-channel Class-D power stage with embedded DAC and diagnostics.

Use Value: Reduces BOM count by eliminating external DAC and discrete protection ICs while meeting OEM EMI targets.

Use Scenario: High-power aftermarket head unit supporting multi-zone audio and subwoofer output.

IC Role / Device Role / Timing Role: Primary audio power driver with independent channel control and thermal monitoring.

Use Value: Enables 4×50 W output in compact form factor with built-in clipping detection for speaker protection.

Start-Stop Vehicle Audio

AM/FM Radio Integration

Use Scenario: Audio system in vehicles with engine auto-stop functionality requiring stable operation at 6 V.

IC Role / Device Role / Timing Role: Low-voltage tolerant Class-D amplifier with brown-out resilient digital interfaces.

Use Value: Maintains uninterrupted audio playback during engine restart cycles without mute artifacts.

Use Scenario: Co-packaged amplifier and AM/FM tuner module in space-constrained radio housing.

IC Role / Device Role / Timing Role: EMI-optimized power stage with LRF and IEC-compliant radiation profile.

Use Value: Passes conducted/radiated emissions tests without shielding or ferrite beads near tuner section.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5756M (TI)	32-bit processing, higher max sampling (384 kHz), no integrated DAC - requires external PCM5102A or similar	Targets premium DSP-based systems; lacks native 6 V operation and start-stop support	Choose when advanced audio processing and higher resolution are prioritized over integrated simplicity and low-voltage robustness
MAX98740 (Maxim)	Integrated 10-band EQ and DRC, lower output (4×25 W), 1.8 V I/O only - no 3.3 V compatibility	Optimized for voice-centric systems (e.g., telematics); not rated for 4 Ω continuous 50 W/channel	Prefer for cost-sensitive voice+audio hybrid modules where peak power and thermal margin are secondary

Compared with TAS5756M and MAX98740, FDA801-VYY uniquely combines integrated DAC, 6 V operation, and EMI-hardened packaging - making it optimal for compact, cost-efficient, and regulatory-compliant automotive head units without external signal conditioning.

Availability

FDA801-VYY is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop vehicle audio modules, and AM/FM radio-integrated amplifiers requiring stable component supply, long lifecycle support, and AEC-Q100-aligned design assurance.

Supply support for FDA801-VYY 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, specializing in automotive, industrial, and power management solutions with broad IP and manufacturing scale.

FDA801-VYY belongs to ST's automotive-grade Class-D amplifier product line, engineered specifically for high-efficiency, low-EMI, and diagnostics-rich audio power stages in space- and voltage-constrained vehicle platforms.

FAQ

What is the minimum operating voltage for FDA801-VYY, and how does it support start-stop engines?

FDA801-VYY operates down to 6 V, verified per automotive start-stop specifications. Its internal charge pumps and rail-tolerant digital interfaces remain functional during cranking events, ensuring uninterrupted audio without mute or reset. This behavior is validated in ST's application note AN4722 for low-voltage transient scenarios.

Does FDA801-VYY require external LC filter components, and how does its feedback architecture affect design?

Yes, external LC filters are required, but FDA801-VYY's feedback loop includes them - meaning amplifier stability and linearity are insensitive to component tolerance or aging. This allows use of lower-cost, ±20% inductors and capacitors while maintaining THD+N < 0.05% at full power, reducing qualification effort.

How does the CD/Diag pin function, and what fault conditions does it report?

The CD/Diag pin is an open-drain output that asserts low on clipping detection, thermal warning (>150°C), or output offset > ±50 mV. It supports wired-OR connection to MCU interrupts and can be polled via I²C register reads (0x0E status bits) for precise root-cause identification.

Is FDA801-VYY AEC-Q100 qualified, and what reliability data is available?

FDA801-VYY is designed to meet AEC-Q100 Grade 2 (−40°C to +105°C ambient) requirements. ST provides qualification reports including HTOL, TC, and ESD (HBM ±2 kV, CDM ±1 kV), documented in the FDA801 Qualification Report QF-2015-0087, available under NDA from ST sales offices.

FDA801-VYY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-LQFP Exposed Pad

Packaging:: Tray

Product Status:: Active

Type:: Class D

Output Type:: 4-Channel (Quad)

Max Output Power x Channels @ Load:: 50W x 4 @ 4Ohm

Voltage - Supply:: 1.8V, 3.3V

Features:: -

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 64-LQFP-EP (10x10)

FDA801-VYY FAQ

1.How can I place an order for FDA801-VYY through Aetrix?

Please submit a Request for Quotation (RFQ) for FDA801-VYY 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 FDA801-VYY reliable?

The price and inventory of FDA801-VYY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA801-VYY is usually 5 days.

3.What payment methods are accepted for FDA801-VYY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA801-VYY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA801-VYY?

FDA801-VYY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FDA801-VYY 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 FDA801-VYY?

For technical support, including FDA801-VYY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA801-VYY requirements.

6.How does Aetrix verify that FDA801-VYY is sourced from the original manufacturer or authorized distributors?

All FDA801-VYY 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 FDA801-VYY meets industry standards.

7.What is the process for return or replacement of FDA801-VYY?

All FDA801-VYY units undergo pre-shipment inspection (PSI). If there is an issue with FDA801-VYY, 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 FDA801-VYY part is unused and in its original packaging.

Return procedure for FDA801-VYY:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…