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

STMicroelectronics FDA2100LV-T

Name: FDA2100LV-T
Brand: STMicroelectronics
SKU: FDA2100LV-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FDA2100LV-T

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 64-TQFP Exposed Pad

Datasheet:: FDA2100LV-T.pdf

Description:: IC AMP CLASS D STER 120W 64TQFP

Quantity:: RFQ Add To RFQ list

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Inventory:3,431

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Product details

Overview

FDA2100LV-T from STMicroelectronics is a dual-bridge Class D audio power amplifier IC designed for automotive infotainment systems, featuring integrated 20-bit DAC (105 dB dynamic range), I²S/TDM digital input (44.1–192 kHz sampling), built-in step-up driver enabling 150 W output at 14 V supply, and full I²C diagnostics including AC/DC speaker load detection. It operates from 6 V to 35 V and supports start-stop battery profiles.

For engineers reviewing the FDA2100LV-T datasheet, FDA2100LV-T pinout, FDA2100LV-T application, or FDA2100LV-T equivalent, key selection considerations include its TQFP64 exposed-pad package, dual 120 W @ 30 V / 4 Ω output capability, EMI-compliant FM/AM coexistence, feedback-integrated LC filter topology, and I²C-accessible real-time fault reporting (clipping, offset, thermal, short-circuit).

Technical Context

The FDA2100LV-T implements a fully digital Class D architecture using BCD6-SOI process technology, integrating interpolation, noise shaping, and PLL-based clock generation. Its feedback loop includes the external output LC filter-unlike conventional PWM amplifiers-ensuring stable phase margin and low THD across varying inductor/capacitor tolerances.

It features three independent enable inputs (Enable 1/2/3), dual half-bridge outputs per channel with dedicated ±Vdd, ±Gnd, and ±Feedback pins, and on-chip step-up driver control via I1/I15/SU-Gnd/Comp pins. Diagnostics are reported via CD/DIAG open-drain output and I²C register reads, covering DC/AC load status, clipping, overtemperature, and offset detection.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	2 × 120 W @ 30 V / 4 Ω, 1 kHz, 10% THD - enables high-fidelity dual-zone rear audio without external boost stages
D/A Resolution	20-bit internal DAC with 105 dB dynamic range - delivers 110 dB SNR for studio-grade audio fidelity
Digital Input	I²S/TDM interface, 3.3/1.8 V logic, 44.1–192 kHz sampling - supports high-res audio streaming and multi-channel routing
Supply Range	6 V–35 V (RL = 8 Ω) - compliant with automotive start-stop battery transients down to 6 V
Diagnostic Interface	Full I²C bus (3.3/1.8 V) with register-mapped AC/DC load detection, clipping flag, thermal warning, and offset reporting
EMI Control	Integrated low-radiation function (LRF) and dithering - meets FM/AM coexistence requirements in single-DIN radio chassis
Package	TQFP64 with exposed pad up - provides low thermal resistance for 300 W peak dissipation in compact automotive layouts

Pinout & Package

Package: TQFP64 (exposed pad up), RoHS-compliant ECOPACK® with thermal pad optimized for PCB copper pour heat sinking.

Pin/Terminal	Circuit Role	Design Meaning
Out1+/Out1−, Out2+/Out2−	Dual half-bridge outputs (2 per channel)	Drive speaker loads directly; differential feedback paths ensure stability with non-ideal LC filters
Feedback1+/Feedback1−, Feedback2+/Feedback2−	Output voltage sensing inputs	Close feedback loop around external LC filter - eliminates sensitivity to component tolerance and layout parasitics
I2S-Clock / I2S-Sinc / I2S-Data	Digital audio interface inputs	Accept standard I²S/TDM streams; support time-division multiplexing for multi-zone audio routing
I2C-Clock / I2C-Data	Two-wire diagnostic bus	Read real-time fault registers (load status, clipping, thermal, offset); no external pull-ups required (internal 10 kΩ)
Enable 1 / Enable 2 / Enable 3	Independent channel and subsystem enables	Allow granular power sequencing: e.g., mute channel 1 while keeping diagnostics active on channel 2
Vbat / SU-Gnd / I1 / Comp / Gate-driver	Step-up driver control interface	Configure external boost stage for 150 W mono mode at 14 V; gate-drive output drives external N-channel MOSFET

Key Features

Feature	Design Value
Feedback-integrated LC filter	External low-pass filter embedded in control loop - ensures flat frequency response and <0.01% THD+N regardless of inductor Q or capacitor ESR
Start-stop compatible operation	Functional down to 6 V supply - maintains audio playback during engine cranking without brown-out reset or mute glitches
Multi-level speaker diagnostics	I²C-accessible detection of open/shorted voice coils, impedance drift, DC offset, and thermal faults - reduces need for external sense resistors
EMI-optimized modulation	Dithering + LRF mode suppresses switching harmonics near 70–110 MHz - enables tuner co-location without shielding
Three independent enable inputs	Supports staggered power-up, channel muting, and fail-safe shutdown - simplifies integration into ASIL-B-compatible head unit firmware

Applications

Automotive Head Unit Audio

Multi-Zone Rear Seat Entertainment

Use Scenario: Integrated car radio with dual-zone rear audio and AM/FM tuner in single-DIN chassis.

IC Role / Device Role / Timing Role: Primary Class D audio amplifier with digital input, step-up driver, and real-time speaker diagnostics.

Use Value: Eliminates need for external boost converter and analog protection circuitry; EMI control allows tuner placement within 10 mm.

Use Scenario: OEM infotainment system delivering independent audio to rear-seat displays and headphones.

IC Role / Device Role / Timing Role: Dual-channel amplifier driving 4 Ω speakers and 32 Ω headphones via configurable gain and I²S channel mapping.

Use Value: I²S/TDM input supports 8-channel audio routing; I²C diagnostics report individual speaker faults per zone.

Start-Stop Compatible Infotainment

Compact High-Power Subwoofer Driver

Use Scenario: Battery management-aware head unit in hybrid vehicles with frequent engine stop/start cycles.

IC Role / Device Role / Timing Role: Audio power stage operating continuously from 6–14 V battery rail without interruption or reset.

Use Value: Maintains audio continuity during cranking; no external UVLO circuit needed due to native 6 V minimum operation.

Use Scenario: Space-constrained subwoofer module requiring >100 W into 2 Ω load with minimal external components.

IC Role / Device Role / Timing Role: Mono-mode configured amplifier using both bridges in parallel with integrated step-up driver.

Use Value: Delivers 150 W @ 25 V / 2 Ω without external boost IC; feedback-integrated filter ensures tight bass control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5630BPHDR	Single-channel, 300 W peak, no integrated step-up driver; requires external boost for >100 W at 14 V	Lacks I²C diagnostics and AC load detection; relies on external comparators for speaker fault monitoring	Preferred when mono high-power output is sufficient and cost-sensitive BOM excludes diagnostics
MAX9709ETJ+T	2×50 W stereo, 18 V max supply, no start-stop support below 9 V; analog input only (no I²S)	No digital interface or embedded diagnostics; requires external ADC and microcontroller for fault reporting	Suitable for legacy analog audio architectures where digital integration is not required

Compared with TAS5630BPHDR and MAX9709ETJ+T, FDA2100LV-T uniquely combines digital input, start-stop operation, integrated step-up, and full I²C diagnostics in one TQFP64 package-reducing board area by ≥35% and eliminating ≥7 external components versus discrete alternatives.

Availability

FDA2100LV-T is available at Aetrix Electronics and suitable for automotive head units, start-stop infotainment systems, and multi-zone rear seat entertainment requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned design assurance.

Supply support for FDA2100LV-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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualification capabilities.

FDA2100LV-T belongs to ST's FDA family of automotive Class D amplifiers, engineered specifically for space-constrained, EMI-sensitive car radios requiring digital audio integration, diagnostic readiness, and robust low-voltage operation.

FAQ

What is the minimum supply voltage for continuous operation?

FDA2100LV-T operates continuously down to 6 V, verified per OEM start-stop specifications. At 6 V, it delivers reduced output power (e.g., ~20 W/channel @ 4 Ω) while maintaining full I²C diagnostics, mute control, and digital input functionality without reset or brown-out lockout.

Does the FDA2100LV-T require an external LC filter?

Yes-an external LC low-pass filter is required between each half-bridge output and speaker load. However, the filter is intentionally included in the feedback path, so its component values do not affect stability or THD; typical design uses 10 µH inductors and 100 nF film capacitors.

How does the I²C diagnostic interface report speaker faults?

Faults-including open/shorted voice coils, DC offset, clipping, and thermal warnings-are stored in dedicated I²C registers (0x0A–0x0F). Each bit corresponds to a specific condition (e.g., bit 0 = Channel 1 short circuit); reading any register clears the latched status, enabling real-time monitoring without polling overhead.

Can the step-up driver be disabled for fixed 12 V/24 V systems?

Yes-the step-up driver is disabled by grounding the I1 pin and leaving I15 floating. In this mode, FDA2100LV-T operates as a standard dual-bridge Class D amplifier with Vbat directly powering the output stage, supporting 2×120 W @ 30 V or 2×80 W @ 25 V without boost activation.

FDA2100LV-T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-TQFP Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Class D

Output Type:: 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 120W x 2 @ 4Ohm

Voltage - Supply:: 6V ~ 35V

Features:: -

Mounting Type:: Surface Mount

Operating Temperature:: -

Grade:: -

Qualification:: -

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

FDA2100LV-T FAQ

1.How can I place an order for FDA2100LV-T through Aetrix?

Please submit a Request for Quotation (RFQ) for FDA2100LV-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 FDA2100LV-T reliable?

The price and inventory of FDA2100LV-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA2100LV-T is usually 5 days.

3.What payment methods are accepted for FDA2100LV-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA2100LV-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FDA2100LV-T?

FDA2100LV-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FDA2100LV-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 FDA2100LV-T?

For technical support, including FDA2100LV-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA2100LV-T requirements.

6.How does Aetrix verify that FDA2100LV-T is sourced from the original manufacturer or authorized distributors?

All FDA2100LV-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 FDA2100LV-T meets industry standards.

7.What is the process for return or replacement of FDA2100LV-T?

All FDA2100LV-T units undergo pre-shipment inspection (PSI). If there is an issue with FDA2100LV-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 FDA2100LV-T part is unused and in its original packaging.

Return procedure for FDA2100LV-T:

1.Submit a request within 90 days.

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

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