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

STMicroelectronics FDA801B-VYY

Name: FDA801B-VYY
Brand: STMicroelectronics
SKU: FDA801B-VYY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FDA801B-VYY

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 64-LQFP Exposed Pad

Datasheet:: FDA801B-VYY.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:2,883

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Product details

Overview

FDA801B-VYY 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 (44.1–192 kHz), and real-time digital impedance meter (DIM) via I²C diagnostics.

For engineers reviewing the FDA801B-VYY datasheet, FDA801B-VYY pinout, FDA801B-VYY application, or FDA801B-VYY equivalent, this device supports low-voltage "start-stop" engine compatibility (6 V min), EMI-compliant AM-band integration in single-DIN head units, and per-channel soft mute/tristate control with fault reporting.

Technical Context

The FDA801B-VYY implements a fully digital signal path with internal 24-bit DAC, interpolation, and noise shaping, feeding four independent Class-D half-bridge outputs. Its feedback loop includes the external L-C filter, enabling linear frequency response and distortion immunity to passive component tolerances.

It integrates an on-chip PLL for clock generation, dual-domain power supplies (AVdd/DVdd), charge pump for high-side gate drive, and comprehensive diagnostics including clipping detection, thermal warning, offset monitoring, and DC/AC load recognition via I²C-specifically engineered for ASIL-B–aligned automotive audio subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 50 W @ 4 Ω, 15.2 V, 1 kHz; enables full-range front/rear speaker driving in compact car audio head units
Efficiency	93% typical at rated load; reduces thermal load and eliminates need for large heatsinks in space-constrained DIN enclosures
DAC Performance	110 dB SNR, 108 dB dynamic range; delivers studio-grade audio fidelity without external DAC or analog routing
Digital Input	I²S/TDM with 44.1/48/96/192 kHz sampling; supports multi-zone audio processing and high-res source playback
Supply Range	6 V to 18 V operation; compliant with ISO 16750-2 "start-stop" transients and battery voltage sag during cranking
EMI Compliance	IEC61967-4 & IEC62132-4 certified; allows co-location with AM tuner in same chassis without shielding or layout penalties
Diagnostic Capability	Integrated DIM (digital impedance meter) reports real-time load value over I²C; detects open/short/load drift for predictive maintenance

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
OUT1+/OUT1− OUT2+/OUT2− OUT3+/OUT3− OUT4+/OUT4−	Half-bridge output terminals (4 channels)	Direct connection to speaker loads; each pair forms one BTL channel capable of 50 W into 4 Ω
FB1+ to FB4−	Channel feedback inputs (8 pins)	Close-loop sensing points placed after output filter; enable distortion cancellation independent of L/C tolerance
I2Cclk / I2Cdata	I²C interface signals	Support 3.3 V/1.8 V logic; provide full configuration, diagnostics readback, and DIM data retrieval
ENABLE1–ENABLE3 HWMute	Channel enable & hardware mute control	Independent per-channel tristate and soft-mute sequencing; HWMute forces global mute with glitch-free ramp-down
CD/Diag	Clipping & diagnostic output	Open-drain alert pin indicating overcurrent, thermal warning, or offset fault-enables system-level error logging

Key Features

Feature	Design Value
Integrated digital impedance meter (DIM)	Measures speaker impedance in real time via I²C; replaces manual calibration and enables adaptive protection algorithms
Low-radiation function (LRF)	Reduces broadband EMI emissions by >10 dB across 30–200 MHz; eliminates need for ferrite beads or shielded cables
Idle-tone–free DAC architecture	Eliminates audible 1/f noise and idle tones below 20 Hz; critical for premium audio systems with subwoofers
Output lowpass filter in feedback path	External L-C filter becomes part of closed-loop gain; removes sensitivity to inductor saturation and capacitor aging
6 V minimum operating voltage	Guarantees uninterrupted audio during cold-cranking (ISO 16750-2 Pulse 4); supports latest OEM start-stop architectures

Applications

Automotive Head Unit

Multi-Zone Infotainment

Use Scenario: Single-DIN car stereo with 4-speaker output and AM/FM tuner integration.

IC Role / Device Role / Timing Role: Quad-channel Class-D audio amplifier with embedded DIM and EMI-hardened layout.

Use Value: Enables tuner co-location without shielding; DIM detects speaker disconnection during service, reducing warranty claims.

Use Scenario: Premium vehicle with front/rear zone separation and independent volume control.

IC Role / Device Role / Timing Role: Digital-input amplifier with per-channel enable/mute and I²C-configurable gain scaling.

Use Value: Soft-mute sequencing prevents pop/click between zones; TDM input supports 8-channel interleaved audio routing.

Start-Stop Audio System

Compact Aftermarket Amplifier Module

Use Scenario: OEM audio system requiring continuous operation during engine restart (6–18 V transient).

IC Role / Device Role / Timing Role: Low-voltage tolerant Class-D amplifier with built-in fault recovery and thermal warning.

Use Value: Maintains audio playback through 6 V brownout; CD/Diag pin triggers graceful fade-out before thermal shutdown.

Use Scenario: Small-form-factor aftermarket amplifier board for retrofit installations.

IC Role / Device Role / Timing Role: Highly integrated digital amplifier eliminating external DAC, DSP, and protection ICs.

Use Value: Reduces BOM count by 12 components; LQFP64 footprint simplifies 2-layer PCB design with minimal thermal vias.

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
TAS5756M (Texas Instruments)	4-channel, 50 W/channel, but analog input only; no integrated DIM or low-voltage 6 V operation	Requires external ADC and impedance sensing circuitry; unsuitable for start-stop compliance	Select when analog source interface is mandatory and EMI constraints are less stringent
MAX98740 (Maxim Integrated)	Quad Class-D with I²S input and 90 dB SNR; lacks integrated charge pump and DIM functionality	Needs external high-side driver for 4 Ω loads; no real-time load reporting capability	Select for cost-sensitive designs where diagnostic depth is secondary to basic amplification

Compared with TAS5756M and MAX98740, FDA801B-VYY uniquely combines digital input, 6 V operation, and on-die impedance metering-enabling single-chip compliance with modern OEM audio requirements without supplemental ICs or firmware overhead.

Availability

FDA801B-VYY is available at Aetrix Electronics and suitable for automotive head units, start-stop audio systems, multi-zone infotainment platforms, and compact aftermarket amplifier modules requiring stable component supply and long-lifecycle support.

Supply support for FDA801B-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 ICs with strong European OEM engagement.

FDA801B-VYY belongs to ST's automotive-grade Class-D amplifier product line, engineered specifically to replace discrete AB amplifiers in space- and efficiency-constrained infotainment systems while meeting ISO 26262 functional safety readiness and EMI regulatory mandates.

FAQ

What is the minimum supply voltage for FDA801B-VYY, and how does it support start-stop engines?

FDA801B-VYY operates down to 6 V, meeting ISO 16750-2 Pulse 4 cold-cranking requirements. Its internal charge pump and rail-tolerant gate drivers maintain full 50 W output capability even during 6–9 V battery sags, ensuring uninterrupted audio during engine restart cycles without brownout reset or mute glitches.

How does the digital impedance meter (DIM) function, and what data does it report?

DIM performs real-time AC impedance measurement using injected test tones and I²C-readback of magnitude/phase data. It reports nominal load value (e.g., "3.8 Ω"), open-circuit detection, and short-circuit confirmation-enabling automated speaker health monitoring and fault logging without external test equipment.

Can FDA801B-VYY drive 2 Ω loads, and what derating applies?

Yes-FDA801B-VYY supports 2 Ω loads per channel with appropriate thermal management. At 2 Ω, maximum continuous output is 35 W/channel at 15.2 V (THD < 10%), limited by junction temperature rise; recommended heatsink thermal resistance ≤ 2.5 °C/W for sustained operation.

Is FDA801B-VYY pin-compatible with FDA801B-VYT, and what is the difference?

FDA801B-VYY and FDA801B-VYT share identical LQFP64 pinout and electrical specifications. The sole difference is packaging: VYY is supplied in trays (for prototyping and low-volume assembly), while VYT uses tape-and-reel (for automated SMT production). No design or layout changes are required when switching between them.

FDA801B-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)

FDA801B-VYY FAQ

1.How can I place an order for FDA801B-VYY through Aetrix?

Please submit a Request for Quotation (RFQ) for FDA801B-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 FDA801B-VYY reliable?

The price and inventory of FDA801B-VYY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA801B-VYY is usually 5 days.

3.What payment methods are accepted for FDA801B-VYY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA801B-VYY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA801B-VYY?

FDA801B-VYY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FDA801B-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 FDA801B-VYY?

For technical support, including FDA801B-VYY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA801B-VYY requirements.

6.How does Aetrix verify that FDA801B-VYY is sourced from the original manufacturer or authorized distributors?

All FDA801B-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 FDA801B-VYY meets industry standards.

7.What is the process for return or replacement of FDA801B-VYY?

All FDA801B-VYY units undergo pre-shipment inspection (PSI). If there is an issue with FDA801B-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 FDA801B-VYY part is unused and in its original packaging.

Return procedure for FDA801B-VYY:

1.Submit a request within 90 days.

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

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