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STMicroelectronics FDA4100LV-T
- Part No.:
- FDA4100LV-T
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 92-PowerBQFP
- Datasheet:
-
FDA4100LV-T.pdf
- Description:
- IC AMP D DUAL/QUAD 270W 92HIQUAD
- Quantity:
- Payment:
- Shipping:
Inventory:1,745
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Product details
Overview
FDA4100LV-T from STMicroelectronics is a quad-bridge Class D automotive audio power amplifier fabricated in BCD-SOI technology, delivering up to 4 × 135 W into 4 Ω or 2 × 270 W into 2 Ω at 25 V, with integrated 108 dB D/A conversion, I²C diagnostics, and step-up driver for low-voltage operation down to 6 V. It supports I²S/TDM digital inputs at sampling rates up to 192 kHz and meets AEC-Q100 Grade 0 qualification for under-hood car radio applications.
For engineers reviewing the FDA4100LV-T datasheet, FDA4100LV-T pinout, FDA4100LV-T application, or FDA4100LV-T equivalent, key selection considerations include its dual-supply MOSFET output architecture, integrated EMI control compliant with CISPR 25 (2009–10), four-channel independent short-circuit protection, and configurable I²C diagnostics for speaker-level DC/AC load detection and thermal monitoring.
Technical Context
The FDA4100LV-T implements a fully differential, feedback-stabilized Class D topology where each of four channels uses independent half-bridge MOSFET outputs with integrated gate drivers and on-chip L-C filter compensation. The feedback loop includes the external output low-pass filter, enabling flat frequency response and low THD (<10% at 1 kHz) regardless of passive component tolerance.
Its digital interface supports I²S/TDM with 3.3 V/1.8 V logic compatibility, while the I²C bus enables per-channel soft mute/play, clipping detection, offset monitoring, and real-time diagnostics including individual speaker status. The built-in step-up driver allows high output power from 14 V battery rails, and operation down to 6 V satisfies start-stop vehicle systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 135 W @ 25 V, 4 Ω, 1 kHz; enables full-range high-fidelity amplification in compact DIN head units without external boost converters. |
| D/A Resolution | 108 dB dynamic range; achieves 110 dB SNR, supporting high-resolution audio playback with minimal quantization noise. |
| Digital Input Support | I²S and TDM with 44.1/48/96/192 kHz sampling; allows direct connection to automotive SoCs and DSPs without external sample-rate conversion. |
| Supply Voltage Range | 6 V to 25 V; ensures uninterrupted operation during engine cranking and start-stop cycles in modern vehicles. |
| EMI Compliance | CISPR 25 (2009–10) Class 5; permits co-location with FM/AM tuners in single-DIN enclosures without shielding or layout penalties. |
| Diagnostic Coverage | Per-channel short-circuit, thermal warning, DC offset, and clipping detection via I²C; reduces need for external monitoring circuitry. |
| Package Thermal Performance | HiQUAD-92 slug-up (14 × 20 mm); exposed thermal pad enables >3 W/°C junction-to-board conduction for sustained 4-channel output. |
Pinout & Package
Package: HiQUAD-92 slug-up (14 mm × 20 mm), thermally enhanced with exposed metal slug for direct PCB heat sinking. RoHS-compliant ECOPACK® package with 92-pin footprint and 0.65 mm pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 52, 73–74, 76–92 | N.C. | No internal connection; electrically isolated to prevent parasitic coupling in high-power switching environment. |
| 3, 12, 13, 22, 53, 62, 63, 72, 23 | Gnd (channel-specific) | Separate analog/digital/power ground pins per channel minimize crosstalk and improve PSRR in multi-channel layout. |
| 4, 11, 54, 61, 64, 71 | Feedback± | Differential feedback inputs tied directly to L-C filter output; enable closed-loop linearity correction independent of inductor/capacitor tolerances. |
| 5–6, 9–10, 15–16, 19–20, 55–56, 59–60, 65–66, 69–70 | Out± | Half-bridge complementary outputs per channel; support parallel configuration for 2 Ω or 1 Ω loads without external current sharing. |
| 24 | Gate-Drive | External MOSFET gate drive output for step-up converter; enables efficient voltage boosting from 12 V battery to 25 V rail. |
| 45 | CD/DIAG | Open-drain diagnostic output signaling overcurrent, thermal fault, or offset condition; simplifies system-level fault logging. |
| 46–47 | I²C-Data / I²C-Clock | 3.3 V/1.8 V tolerant bidirectional interface; supports daisy-chained configuration for multi-amplifier systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Step-Up Driver | Enables 25 V rail generation from 14 V battery input, sustaining full 4 × 135 W output without external DC-DC controller. |
| Low-Voltage Operation (6 V) | Guarantees functional audio output during cold-cranking events and start-stop cycles, meeting OEM "low-voltage robustness" requirements. |
| Per-Channel Short-Circuit Protection | Four independent hardware-protected outputs prevent latch-up or thermal runaway when driving mismatched or damaged speakers. |
| EMI-Low Radiation Function (LRF) | Reduces radiated emissions by >10 dB across 30–200 MHz band, eliminating need for ferrite beads or shielded enclosures in tuner proximity. |
| Configurable I²C Diagnostics | Real-time reporting of DC offset, AC load impedance, thermal margin, and clipping status per channel-no external ADC or microcontroller required. |
Applications
| Automotive Head Unit Amplifier | Start-Stop Vehicle Audio System |
|---|---|
|
Use Scenario: Integrated amplifier in single-DIN car stereo with FM/AM tuner, Bluetooth, and DSP processing. IC Role / Device Role / Timing Role: Quad-channel Class D power stage with embedded D/A and diagnostics, replacing discrete amplifier + DAC + protection IC solution. Use Value: Reduces BOM count by 7 components and PCB area by 35%, while maintaining CISPR 25 compliance in shared chassis space. |
Use Scenario: Audio subsystem in hybrid/electric vehicle with 12 V battery subject to 6–16 V transients during engine restart. IC Role / Device Role / Timing Role: Low-voltage-tolerant power amplifier ensuring continuous audio playback during cranking dips below 7 V. Use Value: Eliminates need for external pre-regulator or brownout reset circuitry, improving system reliability and reducing startup latency. |
| Multi-Zone In-Car Entertainment | Aftermarket DSP-Driven Amplifier |
|
Use Scenario: Front/rear/subwoofer zone amplification in premium OEM infotainment with independent volume and EQ per channel. IC Role / Device Role / Timing Role: Four independent digitally controlled Class D channels with I²C-configurable gain, mute, and diagnostics. Use Value: Enables software-defined audio routing and real-time speaker health monitoring without adding MCU overhead or external sensors. |
Use Scenario: High-fidelity aftermarket amplifier module accepting I²S/TDM streams from external DSP processors. IC Role / Device Role / Timing Role: Digital-input Class D power stage with 192 kHz native sampling support and ultra-low jitter clock recovery. Use Value: Preserves full resolution of high-res audio sources (e.g., FLAC 24-bit/192 kHz) without interpolation artifacts or timing drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel automotive Class D amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS6584Q1 | 4-channel, 100 W/channel @ 4 Ω, 12 V; no integrated step-up driver; requires external boost for >18 V output rails. | Lacks on-chip voltage boosting and low-voltage 6 V operation; suited for fixed 12 V systems only. | Select when board space allows external DC-DC and system voltage remains stable above 10 V. |
| MAX9768A | Quad 50 W/channel @ 4 Ω, 12 V; analog input only; no I²C diagnostics or digital input interface. | Requires external DAC and microcontroller for diagnostics; not suitable for digital-first automotive architectures. | Select only for legacy analog signal chains where cost sensitivity outweighs integration benefits. |
Compared with TAS6584Q1 and MAX9768A, FDA4100LV-T uniquely combines 4-channel high-power Class D output, integrated step-up driver, 6 V operation, and full I²C diagnostics in one package-reducing total system complexity and enabling compact, future-proof automotive audio designs.
Availability
FDA4100LV-T is available at Aetrix Electronics and suitable for automotive head units, start-stop vehicle audio systems, multi-zone in-car entertainment, and aftermarket DSP-driven amplifiers requiring stable component supply and long-term lifecycle support.
Supply support for FDA4100LV-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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade analog devices since 1987.
FDA4100LV-T belongs to ST's automotive audio power amplifier product line, engineered specifically for space-constrained, high-efficiency car radio applications demanding AEC-Q100 qualification, low EMI, and seamless integration with digital signal processors.
FAQ
What is the minimum supply voltage for FDA4100LV-T to maintain full functionality?
The FDA4100LV-T operates fully down to 6 V supply voltage, supporting engine cranking and start-stop vehicle systems without mute or shutdown. At 6 V, it delivers reduced but functional output power (e.g., ~4 × 35 W @ 4 Ω), with all diagnostics, I²C interface, and digital input receivers remaining active and compliant with AEC-Q100 Grade 0 specifications.
Does FDA4100LV-T require external output LC filters?
Yes, FDA4100LV-T requires external second-order LC low-pass filters per channel, but its feedback architecture incorporates those filters into the control loop-ensuring stable operation and consistent THD+N performance even with ±20% inductor/capacitor tolerance. ST provides recommended component values and layout guidelines in AN4722.
How does the step-up driver function, and what external components are needed?
The step-up driver (pin 24) controls an external N-channel MOSFET in a boost converter topology. Required external components include a power inductor (10–22 µH), Schottky diode, output capacitor (≥220 µF), and feedback resistors to set output voltage (typically 25 V). ST reference design FDA4100LV-EVAL uses the STNRG388A controller for full regulation.
Can FDA4100LV-T drive 1 Ω loads, and how is protection implemented?
Yes, FDA4100LV-T supports 1 Ω loads via paralleled half-bridges per channel (e.g., Out1+ and Out2+ tied together). Protection includes four independent hardware-based short-circuit detectors with <1 µs response time, thermal foldback activated at 150 °C junction temperature, and automatic recovery after fault clearance-no firmware intervention required.
FDA4100LV-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 92-PowerBQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Class D
- Output Type:
- 2-Channel (Stereo) or 4-Channel (Quad)
- Max Output Power x Channels @ Load:
- 270W x 2 @ 2Ohm, 135W x 4 @ 4Ohm
- Voltage - Supply:
- -
- Features:
- Mute, Short-Circuit and Thermal Protection
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 92-HiQUAD (14x20)
FDA4100LV-T FAQ
1.How can I place an order for FDA4100LV-T through Aetrix?
Please submit a Request for Quotation (RFQ) for FDA4100LV-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 FDA4100LV-T reliable?
The price and inventory of FDA4100LV-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA4100LV-T is usually 5 days.
3.What payment methods are accepted for FDA4100LV-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA4100LV-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FDA4100LV-T?
FDA4100LV-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FDA4100LV-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 FDA4100LV-T?
For technical support, including FDA4100LV-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA4100LV-T requirements.
6.How does Aetrix verify that FDA4100LV-T is sourced from the original manufacturer or authorized distributors?
All FDA4100LV-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 FDA4100LV-T meets industry standards.
7.What is the process for return or replacement of FDA4100LV-T?
All FDA4100LV-T units undergo pre-shipment inspection (PSI). If there is an issue with FDA4100LV-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 FDA4100LV-T part is unused and in its original packaging.
Return procedure for FDA4100LV-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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