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

STMicroelectronics FDA801-VYT

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

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Part No.:: FDA801-VYT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 64-LQFP Exposed Pad

Datasheet:: FDA801-VYT.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:1,271

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Product details

Overview

FDA801-VYT from STMicroelectronics is a quad-channel Class-D audio power amplifier IC designed for automotive infotainment systems, featuring 4 × 50 W output into 4 Ω at 15.2 V, integrated 110 dB D/A conversion, I²S/TDM digital input (supporting 44.1–192 kHz sampling), and full I²C diagnostics including DC/AC load detection and clipping monitoring.

For engineers reviewing the FDA801-VYT datasheet, FDA801-VYT pinout, FDA801-VYT application, or FDA801-VYT equivalent, this device is selected for high-efficiency, low-EMI, low-voltage (6 V) automotive amplifiers requiring precise fault diagnostics, EMI-compliant single-DIN integration, and digital-input-based thermal/overcurrent protection.

Technical Context

The FDA801 employs BCD process technology to integrate four independent Class-D half-bridge channels with embedded 24-bit DACs, digital interpolation, noise shaping, and feedback loops that include the external L-C filter-enabling linearity and distortion immunity regardless of passive component tolerance. Its PLL-based clock generation supports asynchronous I²S/TDM inputs up to 192 kHz.

Each channel features independent enable/mute control, tristate output capability, and dedicated current generators for offset and clipping detection. The device implements low-radiation function (LRF), AM-band EMI suppression per IEC61967-4/IEC62132-4, and operates down to 6 V for start-stop engine compatibility.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 50 W @ 4 Ω, 15.2 V, 1 kHz - delivers full-range audio power in compact automotive head units without heatsink oversizing.
D/A Resolution & SNR	24-bit / 110 dB SNR, 108 dB dynamic range - enables high-fidelity playback with minimal quantization noise in digital audio chains.
Digital Input Support	I²S and TDM, 3.3/1.8 V logic, 44.1–192 kHz sampling - interoperates with modern SoCs and DSPs without level-shifting or resampling.
Efficiency	93% typical at rated load - reduces thermal load and power supply demand in space-constrained 12 V automotive environments.
EMI Compliance	Evaluated per IEC61967-4 (conducted) and IEC62132-4 (radiated) - certified for co-location with AM tuners in single-DIN enclosures.
Supply Voltage Range	6 V to 18 V - supports start-stop vehicle architectures and brown-out resilience during cranking transients.
Diagnostic Coverage	I²C-accessible overcurrent, thermal warning, offset, and clipping detection - enables real-time system health monitoring without external sensors.

Pinout & Package

LQFP64 (10 × 10 × 1.4 mm, exposed pad up) package with thermal slug (Pin 49, TAB) for enhanced power dissipation in automotive under-hood ambient conditions.

Pin/Terminal	Circuit Role	Design Meaning
OUT1+/OUT1−, OUT2+/OUT2−, etc.	Half-bridge output terminals (4 channels)	Direct connection to speaker loads; each pair forms one bridged Class-D channel with internal gate drivers.
FB1+/FB1−, FB2+/FB2−, etc.	Channel-specific feedback inputs	Close-loop control includes external LC filter in signal path-reducing sensitivity to inductor/capacitor nonlinearity.
ENABLE 1–3	Per-channel enable control	Independent hardware gating of output stage; allows dynamic channel disabling for power management or fault isolation.
I2Cclk / I2Cdata	I²C interface pins	Support 3.3/1.8 V operation; enable configuration, diagnostics readback, and real-time status reporting (e.g., load detection).
CD/Diag	Open-drain diagnostic output	Asserts on overcurrent, thermal warning, or offset fault-supports wired-OR fault bus for multi-device monitoring.
TAB (Pin 49)	Exposed thermal pad	Must be soldered to PCB ground plane for thermal conduction; critical for maintaining <115°C junction temp at full 4×50 W output.

Key Features

Feature	Design Value
Integrated 24-bit DAC + noise shaper	Eliminates external DAC and analog routing; achieves 110 dB SNR while reducing board area and EMI susceptibility.
Feedback-inclusive LC filter topology	Enables use of low-cost, low-tolerance inductors/capacitors without compromising THD+N or frequency response flatness.
Low Radiation Function (LRF)	Reduces radiated emissions in AM band (530–1710 kHz); permits direct placement adjacent to tuner modules in DIN head units.
I²C-driven diagnostics suite	Provides programmable thresholds and real-time readback for clipping, offset, thermal, and load faults-no external ADC or comparator needed.
6 V minimum operating voltage	Ensures uninterrupted audio playback during engine cranking (typ. 6–8 V) and start-stop cycles-meets OEM LV124 requirements.

Applications

Automotive Infotainment Head Unit

AM/FM Tuner-Integrated Audio System

Use Scenario: Compact single-DIN car radio with integrated tuner, DSP, and 4-speaker output.

IC Role / Device Role / Timing Role: Primary Class-D audio power stage with digital input interface and real-time diagnostics.

Use Value: Eliminates analog input stages and external protection circuitry; meets EMI limits for co-location with AM tuner without shielding.

Use Scenario: OEM head unit requiring AM-band immunity and start-stop compatibility.

IC Role / Device Role / Timing Role: High-efficiency quad amplifier with LRF and 6 V operation for battery transient resilience.

Use Value: Sustains audio output during cranking events and avoids AM interference-verified per IEC61967-4.

Multi-Zone Cabin Audio Distribution

Aftermarket DSP-Enhanced Amplifier Module

Use Scenario: Front/rear zone separation using independent channel enable control.

IC Role / Device Role / Timing Role: Four independently configurable Class-D channels with tristate outputs and mute sequencing.

Use Value: Enables software-defined zone muting and power cycling-reducing idle current and enabling personalized audio zoning.

Use Scenario: External DSP-fed amplifier module for premium sound systems.

IC Role / Device Role / Timing Role: Digital-input Class-D driver accepting TDM streams from external audio processors.

Use Value: Supports 192 kHz sample rates and 24-bit depth-preserving high-resolution audio fidelity from upstream DSP processing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5634RHBR	4 × 50 W, 192 kHz I²S, but no integrated DAC; requires external 24-bit DAC and analog input interface.	Lacks on-chip diagnostics (no clipping/offset detection); relies on external monitoring circuitry.	Preferred when system already includes high-performance external DAC and diagnostics are handled at MCU level.
MAX9776AEE+T	4 × 30 W, 96 kHz max, analog input only; no digital interface or I²C diagnostics.	Requires full analog signal chain; no support for start-stop voltage or AM-band EMI compliance.	Suitable only for legacy analog designs where digital integration and low-voltage operation are not required.

Compared with TAS5634RHBR and MAX9776AEE+T, FDA801-VYT uniquely integrates DAC, diagnostics, and EMI-optimized Class-D in one LQFP64 package-reducing BOM count by ≥7 components and enabling single-DIN AM-compatible deployment without redesign.

Availability

FDA801-VYT is available at Aetrix Electronics and suitable for automotive infotainment head units, AM/FM tuner-integrated audio systems, and multi-zone cabin audio distribution requiring stable component supply, long lifecycle support, and AEC-Q100-aligned manufacturing traceability.

Supply support for FDA801-VYT 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 analog devices for automotive, industrial, and consumer markets.

FDA801-VYT belongs to ST's automotive-grade Class-D audio amplifier product line, engineered specifically for EMI-robust, low-voltage, digitally controlled infotainment systems meeting stringent OEM timing, diagnostics, and reliability requirements.

FAQ

What is the minimum supply voltage for FDA801-VYT operation?

FDA801-VYT operates down to 6 V, enabling reliable audio playback during engine cranking and start-stop cycles. This specification complies with automotive LV124 requirements and eliminates need for auxiliary boost circuits in 12 V systems.

Does FDA801-VYT require external LC filters for EMI compliance?

Yes-external LC low-pass filters are required on each output, but FDA801-VYT's feedback architecture includes those filters in the control loop, allowing use of cost-effective, ±20% tolerance inductors and capacitors without degrading THD+N or stability.

How does the CD/Diag pin function during fault conditions?

The CD/Diag pin is an open-drain output that pulls low during overcurrent, thermal warning (>150°C), output offset >±100 mV, or clipping detection. It supports wired-OR connection across multiple FDA801 devices for centralized fault monitoring without additional logic.

Can FDA801-VYT drive 2 Ω loads?

Yes-FDA801-VYT supports 2 Ω loads per channel with appropriate thermal derating. At 14.4 V, it delivers 28 W at 10% THD into 4 Ω; driving 2 Ω requires PCB copper area optimization and airflow validation to maintain junction temperature below 115°C.

FDA801-VYT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-LQFP Exposed Pad

Packaging:: Tape & Reel (TR)

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-VYT FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA801-VYT?

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

Once your FDA801-VYT 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-VYT?

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

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

All FDA801-VYT 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-VYT meets industry standards.

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

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

Return procedure for FDA801-VYT:

1.Submit a request within 90 days.

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

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