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

STMicroelectronics FDA450LV-T

Name: FDA450LV-T
Brand: STMicroelectronics
SKU: FDA450LV-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FDA450LV-T

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 100-TQFP Exposed Pad

Datasheet:: FDA450LV-T.pdf

Description:: IC AMP CLASS D QUAD 50W 100TQFP

Quantity:: RFQ Add To RFQ list

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Inventory:4,909

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Product details

Overview

FDA450LV-T from STMicroelectronics is a quad-bridge Class D audio power amplifier in TQFP100 package, designed for automotive car radio systems. It delivers 4 × 50 W into 4 Ω at 15.2 V, integrates 108 dB D/A conversion, supports I²S/TDM digital input (up to 192 kHz), and operates down to 6 V for start-stop vehicle systems.

For engineers reviewing the FDA450LV-T datasheet, FDA450LV-T pinout, FDA450LV-T application, or FDA450LV-T equivalent, key selection criteria include its integrated diagnostics (clipping, offset, short-circuit detection), EMI-compliant FM/AM coexistence, low external component count, and I²C-configurable mute/soft-play control for automotive infotainment designs.

Technical Context

The FDA450LV-T implements a BCD-SOI process-based quad half-bridge output stage with feedback loops incorporating the external L-C low-pass filter-enabling flat frequency response and low distortion independent of passive component tolerance. Its digital core accepts I²S/TDM streams at 44.1/48/96/192 kHz and performs on-chip interpolation, noise shaping, and dithering before PWM generation.

Diagnostics are fully integrated via I²C: DC/AC load detection, internally generated test signals, thermal warning, and four independent short-circuit protections per channel. The device features three enable pins (Enable 1/2/3), a dedicated Mute input, and dual-domain power supplies (A-Vdd/D-Vdd) with separate analog/digital grounds for noise isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 50 W @ 4 Ω, 15.2 V, 1 kHz - sufficient for full-range front/rear speaker drive in DIN-sized head units
D/A Resolution	108 dB dynamic range - enables >110 dB SNR with minimal quantization noise in high-fidelity audio paths
Digital Input	I²S/TDM, 3.3/1.8 V logic - compatible with modern SoC audio interfaces without level-shifting
Sampling Rates	44.1 / 48 / 96 / 192 kHz - supports CD, streaming, and high-res audio playback without sample-rate conversion
Supply Range	6–18 V - meets ISO 16750-2 "start-stop" automotive voltage transients
EMI Compliance	CEI EN 55025:2009-10 - validated for co-location with AM/FM tuners in single-DIN enclosures
Diagnostic Coverage	Clipping, offset, thermal, and 4× independent short-circuit detection - reduces need for external monitoring circuitry

Pinout & Package

TQFP100 package with exposed thermal pad (up), 0.5 mm pitch, 14 × 14 mm body. Designed for high-power dissipation in compact automotive head unit layouts.

Pin	Circuit Role	Design Meaning
Vbat (Pin 24)	Main power supply input	Accepts 6–18 V unregulated battery rail; feeds internal regulators and output bridges
A-Vdd (30), D-Vdd (31)	Analog & digital supply rails	Separate 3.3 V domains isolate noise-sensitive DAC and digital control logic
I2C-Data (48), I2C-Clock (49)	I²C interface	Configures mute/soft-play, reads diagnostics (load, thermal, clipping), sets protection thresholds
Out1+/Out1− to Out4+/Out4−	Quad bridge outputs	Four independent half-bridge pairs; support 1 Ω–4 Ω loads via paralleling or single-channel use
Feedback1+ to Feedback4−	Output feedback terminals	Close loop around external L-C filter - ensures linearity regardless of inductor/capacitor tolerance
Enable 1/2/3 (Pins 29,44,45)	Channel enable controls	Independent activation of channel groups - enables flexible power sequencing and channel muting

Key Features

Feature	Design Value
Integrated 108 dB D/A converter	Eliminates external DAC and associated layout complexity while achieving >110 dB SNR
EMI-optimized modulation & layout	Enables placement adjacent to AM/FM tuner modules without shielding or spacing penalties
On-chip diagnostic engine	Reduces BOM count by replacing discrete current sense, thermal, and clipping monitor ICs
Low-voltage operation (6 V min)	Supports engine start-stop cycles without audio dropout or brownout reset
I²C-configurable soft play/mute	Prevents pop/click during power-up/down and source switching in multi-source head units

Applications

Automotive Head Unit

Aftermarket Stereo System

Use Scenario: Integrated 4-channel amplifier in OEM single-DIN car radio with AM/FM tuner and Bluetooth audio.

IC Role / Device Role / Timing Role: Primary Class D audio driver with embedded diagnostics and digital input interface.

Use Value: Eliminates external DAC, reduces EMI filtering components, and enables I²C-based fault reporting to MCU without additional sensors.

Use Scenario: Compact aftermarket stereo supporting high-res audio playback and multiple speaker zones.

IC Role / Device Role / Timing Role: Quad-channel power stage with configurable output bridging and thermal management.

Use Value: Delivers 50 W/channel into 4 Ω while maintaining THD < 10 % at 14.4 V, enabling clean mid-bass reproduction without heatsink oversizing.

Start-Stop Vehicle Audio

Multi-Zone Infotainment

Use Scenario: Audio system operating through 6–18 V battery transients during engine cranking and idle-stop cycles.

IC Role / Device Role / Timing Role: Low-voltage-tolerant amplifier with brownout immunity and seamless mute recovery.

Use Value: Maintains audio continuity during 6 V dips; avoids reset-induced silence or glitching in safety-critical driver information contexts.

Use Scenario: Central infotainment unit driving front speakers, rear speakers, and subwoofer with independent volume control.

IC Role / Device Role / Timing Role: Configurable quad-bridge with channel enable/disable and I²C readback of load status per zone.

Use Value: Enables software-defined speaker mapping (e.g., bridge two channels for subwoofer) and real-time open/short detection per output path.

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
TAS5630B from Texas Instruments	Higher peak power (4 × 70 W), no integrated D/A; requires external PCM5102A or similar DAC	Lacks built-in diagnostics and low-voltage start capability below 8 V	Preferred when maximum output power is prioritized over integration and start-stop compliance
MAX9768B from Maxim Integrated	3.3 V only digital interface; 4 × 35 W output; no TDM support; lower EMI robustness	Not certified to CEI EN 55025; unsuitable for tuner-cohabitation in DIN enclosures	Selected for cost-sensitive non-tuner-integrated systems where EMI constraints are relaxed

Compared with TAS5630B and MAX9768B, FDA450LV-T uniquely combines integrated 108 dB D/A conversion, 6 V start-stop operation, and EMI-compliant FM/AM coexistence-making it optimal for space-constrained, tuner-integrated automotive head units requiring full diagnostic visibility and high-fidelity playback.

Availability

FDA450LV-T is available at Aetrix Electronics and suitable for automotive head units, start-stop vehicle audio systems, aftermarket stereo platforms, and multi-zone infotainment designs requiring stable component supply across extended production lifecycles.

Supply support for FDA450LV-T 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, serving automotive, industrial, and consumer markets with silicon solutions since 1987.

The FDA450LV-T belongs to ST's FDA (Fully Digital Amplifier) family-designed specifically for automotive infotainment systems requiring high-efficiency Class D amplification, integrated signal processing, and robust diagnostics in compact form factors.

FAQ

What is the minimum supply voltage for continuous operation?

The FDA450LV-T operates continuously down to 6 V, meeting ISO 16750-2 requirements for engine start-stop systems. Below 6 V, the device enters undervoltage lockout; recovery occurs automatically once Vbat exceeds 6.2 V with hysteresis.

Does FDA450LV-T require external LC filters for EMC compliance?

No external EMI filters are required for CEI EN 55025 compliance-the device integrates EMI control techniques including spread-spectrum modulation and optimized gate drive timing. The recommended 1.5 µH / 10 nF output filter serves primarily for audio band limiting, not EMC suppression.

Can all four channels be bridged to drive a single subwoofer?

Yes-any two adjacent channels (e.g., Ch1+Ch2 or Ch3+Ch4) can be configured in bridge-tied-load (BTL) mode via I²C register settings, delivering up to 100 W into 2 Ω. Independent enable pins allow selective activation of bridged vs. stereo configurations.

How does the integrated offset detector function during mute mode?

The offset detector remains active in both play and mute modes, continuously monitoring DC voltage at each output. If offset exceeds ±100 mV, it triggers diagnostic flag CD/DIAG and reports via I²C-enabling detection of failed output stages even when audio is silenced.

FDA450LV-T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 100-TQFP 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:: -

Features:: -

Mounting Type:: Surface Mount

Operating Temperature:: -

Grade:: -

Qualification:: -

Supplier Device Package:: 100-TQFP-EP (14x14)

FDA450LV-T FAQ

1.How can I place an order for FDA450LV-T through Aetrix?

Please submit a Request for Quotation (RFQ) for FDA450LV-T 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 FDA450LV-T reliable?

The price and inventory of FDA450LV-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA450LV-T is usually 5 days.

3.What payment methods are accepted for FDA450LV-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA450LV-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA450LV-T?

FDA450LV-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FDA450LV-T 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 FDA450LV-T?

For technical support, including FDA450LV-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA450LV-T requirements.

6.How does Aetrix verify that FDA450LV-T is sourced from the original manufacturer or authorized distributors?

All FDA450LV-T 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 FDA450LV-T meets industry standards.

7.What is the process for return or replacement of FDA450LV-T?

All FDA450LV-T units undergo pre-shipment inspection (PSI). If there is an issue with FDA450LV-T, 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 FDA450LV-T part is unused and in its original packaging.

Return procedure for FDA450LV-T:

1.Submit a request within 90 days.

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

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