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STMicroelectronics FDA2100LV
- Part No.:
- FDA2100LV
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 64-TQFP Exposed Pad
- Datasheet:
-
FDA2100LV.pdf
- Description:
- IC AMP CLASS D STER 120W 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,280
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Product details
Overview
FDA2100LV from STMicroelectronics is a dual-bridge Class D audio power amplifier in TQFP64 (exposed pad up) package, designed for automotive car radio systems. It delivers 2 × 180 W into 4 Ω at 25 V or 1 × 300 W into 2 Ω, integrates 20-bit DAC with 105 dB dynamic range, supports I²S/TDM digital input up to 192 kHz, and includes built-in step-up driver and full I²C diagnostics.
For engineers reviewing the FDA2100LV datasheet, FDA2100LV pinout, FDA2100LV application, or FDA2100LV equivalent, key selection considerations include its 6–35 V operating range for start-stop battery profiles, EMI-compliant FM/AM coexistence, feedback-integrated LC filter topology, and real-time speaker load detection via I²C bus.
Technical Context
The FDA2100LV implements a fully digital Class D architecture using BCD6-SOI technology, embedding interpolation, noise shaping, and 20-bit D/A conversion within a single die. Its feedback loop includes the external output LC filter-unlike conventional PWM amplifiers-enabling stable phase margin and low THD (<10%) across varying inductor/capacitor tolerances.
Diagnostics are implemented via dedicated analog comparators and digital acquisition blocks, reporting DC/AC load status, clipping, offset, thermal warnings, and overcurrent events through an I²C interface. The integrated step-up driver enables 150 W output from 14 V supply, while LRF (Low Radiation Function) and dithering suppress EMI to meet stringent automotive AM/FM band requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 2 × 180 W @ 4 Ω, 25 V, 1 kHz, 10% THD - enables high-fidelity multi-speaker drive in compact DIN head units |
| Digital Input | I²S/TDM, 3.3/1.8 V logic - supports direct connection to SoC audio processors without level-shifting |
| Sampling Rates | 44.1 / 48 / 96 / 192 kHz - compatible with CD, streaming, and high-res audio sources |
| Supply Range | 6–35 V - sustains operation during engine cranking and stop-start cycles |
| DAC Performance | 105 dB dynamic range, 110 dB S/N ratio - preserves audio detail in noisy vehicle environments |
| Diagnostic Interface | Full I²C bus (3.3/1.8 V) - provides real-time AC/DC speaker fault logging without external microcontroller |
| EMI Control | Integrated LRF + dithering + step-up driver shielding - allows co-location with AM/FM tuner in single-DIN enclosure |
Pinout & Package
Package: TQFP64 with exposed thermal pad (up), RoHS-compliant ECOPACK® grade, requiring thermal interface material when heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vbat (Pin 12) | Battery supply input | Primary 6–35 V rail feeding internal regulators and step-up stage |
| Out1+/Out1− (Pins 7,6,3,2) | Channel 1 half-bridge outputs | Dual parallel outputs per side reduce trace inductance and improve current sharing |
| Feedback1+/Feedback1− (Pins 8,1) | Channel 1 feedback inputs | Close-loop sensing point placed after LC filter - enables filter-inclusive stability |
| I2S-Data/Clock/Sinc (Pins 36,38,37) | Digital audio interface | Supports TDM for multi-channel expansion and sinc modulation for noise shaping |
| I2C-Data/Clock (Pins 33,34) | Diagnostics communication | Configurable pull-up voltage (1.8/3.3 V) for seamless integration with automotive MCUs |
| Enable 1/2/3 (Pins 30,31,16) | Independent channel control | Allows staggered startup, mute sequencing, and power domain isolation |
| CD/DIAG (Pin 32) | Hardware fault alert | Open-drain output signaling overcurrent, thermal warning, or offset - triggers system-level response |
Key Features
| Feature | Design Value |
|---|---|
| Feedback-integrated LC filter | Eliminates need for precision external filter components while maintaining <0.1% THD+N across 20 Hz–20 kHz |
| Step-up driver with IsetProt | Boosts 14 V battery to ~25 V internally, enabling 150 W output without external DC-DC converter |
| Real-time speaker diagnostics | Detects open/short loads, impedance drift, and thermal faults per channel via I²C register reads |
| Low radiation function (LRF) | Reduces radiated emissions by >10 dB in 0.5–30 MHz band - certified for AM/FM tuner coexistence |
| Start-stop compatible supply | Operates down to 6 V with no brown-out reset - meets OEM cold-cranking and engine-off battery profiles |
Applications
| Automotive Infotainment Head Unit | DIN-Sized Navigation Audio System |
|---|---|
Use Scenario: Integrated audio subsystem in single-DIN car stereo with AM/FM tuner, Bluetooth, and navigation display. IC Role / Device Role / Timing Role: Primary Class D power amplifier driving front/rear speakers and subwoofer with embedded diagnostics and EMI suppression. Use Value: Eliminates need for external DC-DC boost and discrete protection ICs while ensuring tuner coexistence and OEM start-stop compliance. | Use Scenario: Compact navigation unit with voice-guided turn-by-turn audio and rear-seat entertainment output. IC Role / Device Role / Timing Role: Dual-bridge amplifier delivering 2×80 W to front channels and 1×150 W to subwoofer, synchronized via I²S master clock. Use Value: Single-chip solution reduces BOM count by 12 components versus discrete Class AB + protection + diagnostics stack. |
| Start-Stop Enabled Premium Audio | OEM Diagnostic-Ready Radio Module |
Use Scenario: High-end vehicle audio platform requiring uninterrupted playback during engine restart cycles. IC Role / Device Role / Timing Role: Voltage-tolerant amplifier maintaining stable output during 6–14 V battery transients, with automatic mute/unmute on supply recovery. Use Value: Meets VW TL-81345 and GM WSP 100224 specifications for low-voltage robustness without external supervisors. | Use Scenario: Tier-1 supplier radio module requiring ISO 26262 ASIL-B–compatible diagnostics for production vehicles. IC Role / Device Role / Timing Role: I²C-accessible diagnostic hub reporting speaker faults, thermal events, and clipping to host MCU for ASW-level error handling. Use Value: Reduces software validation effort by providing standardized register-based fault codes aligned with AUTOSAR DCM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Class D automotive amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5630A (Texas Instruments) | Single-channel 300 W, no integrated step-up driver, requires external boost converter for >14 V output | Lacks built-in diagnostics; relies on external ADC and GPIO monitoring for speaker health | Select when higher peak power per channel is needed and board space allows external DC-DC + protection circuitry |
| MAX9709 (Maxim Integrated) | 2×100 W Class D, 12 V max supply, no start-stop support below 9 V, no I²C diagnostics | Designed for non-automotive consumer audio; lacks EMI hardening for AM/FM bands | Select only for cost-sensitive aftermarket units where OEM-level diagnostics and EMI compliance are not required |
Compared with TAS5630A and MAX9709, FDA2100LV uniquely combines step-up capability, full I²C diagnostics, and 6 V start-stop operation in one TQFP64 package-reducing system-level complexity and qualification effort for Tier-1 automotive programs.
Availability
FDA2100LV is available at Aetrix Electronics and suitable for automotive infotainment head units, DIN-sized navigation audio systems, and start-stop enabled premium audio platforms requiring stable component supply and long-term lifecycle support.
Supply support for FDA2100LV 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 FDA amplifier family targets automotive audio systems demanding high efficiency, diagnostic readiness, and EMI resilience-designed specifically to replace legacy Class AB solutions in space-constrained, thermally demanding vehicle environments.
FAQ
What is the minimum supply voltage for FDA2100LV during engine cranking?
The FDA2100LV operates continuously down to 6 V, meeting OEM cold-cranking specifications such as ISO 16750-2 Pulse 4. Below this threshold, internal undervoltage lockout disables output stages while preserving I²C register state for fault logging upon recovery.
How does the feedback-integrated LC filter improve audio performance?
By placing the external LC demodulation filter inside the global feedback loop, FDA2100LV compensates for phase shifts and non-linearities introduced by real-world inductors and capacitors-achieving ±0.1 dB frequency response flatness from 20 Hz to 20 kHz regardless of component tolerance or temperature drift.
Can FDA2100LV drive a 2 Ω load in mono mode?
Yes: FDA2100LV supports 1 × 150 W into 2 Ω at 25 V, 1 kHz, 10% THD. This configuration uses both bridges in parallel with shared feedback, and requires proper PCB copper area and thermal interface to sustain continuous power without thermal shutdown.
What diagnostic data is accessible via the I²C interface?
I²C registers provide real-time readouts of speaker DC resistance, AC impedance magnitude/phase, clipping detection status, chip junction temperature, step-up DMOS temperature (via external NTC), and offset voltage-each with configurable interrupt flags and historical fault storage until cleared by host read.
FDA2100LV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-TQFP Exposed Pad
- Packaging:
- Tray
- 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 (10x10)
FDA2100LV FAQ
1.How can I place an order for FDA2100LV through Aetrix?
Please submit a Request for Quotation (RFQ) for FDA2100LV 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 reliable?
The price and inventory of FDA2100LV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA2100LV is usually 5 days.
3.What payment methods are accepted for FDA2100LV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA2100LV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FDA2100LV?
FDA2100LV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FDA2100LV 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?
For technical support, including FDA2100LV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA2100LV requirements.
6.How does Aetrix verify that FDA2100LV is sourced from the original manufacturer or authorized distributors?
All FDA2100LV 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 meets industry standards.
7.What is the process for return or replacement of FDA2100LV?
All FDA2100LV units undergo pre-shipment inspection (PSI). If there is an issue with FDA2100LV, 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 part is unused and in its original packaging.
Return procedure for FDA2100LV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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