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STMicroelectronics FDA903Q-V0Y
- Part No.:
- FDA903Q-V0Y
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 48-TFQFN Exposed Pad
- Datasheet:
-
FDA903Q-V0Y.pdf
- Description:
- 1 X 45 W CLASS D DIGITAL INPUT A
- Quantity:
- Payment:
- Shipping:
Inventory:1,421
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Product details
Overview
FDA903Q-V0Y from STMicroelectronics is a single-channel Class D digital input automotive audio power amplifier with integrated 108 dB D/A conversion, I²S/TDM interface (up to 16-channel TDM), and full diagnostic suite including open-load detection in play mode, clipping detection, and thermal warnings. It delivers 25 W into 4 Ω at 14.4 V (THD = 1%) and operates from 3.3–18 V, targeting car radio, telematics, and e-call systems.
For engineers reviewing the FDA903Q-V0Y datasheet, FDA903Q-V0Y pinout, FDA903Q-V0Y application, or FDA903Q-V0Y equivalent, this page provides verified technical context, validated pin functions, confirmed automotive diagnostics behavior, real-world thermal resistance (28.5 °C/W), and precise I²C-configurable amplitude limiter implementation details.
Technical Context
The FDA903Q-V0Y implements a closed-loop Class D architecture where the output L-C low-pass filter is embedded in the feedback path-enabling superior frequency response linearity (<0.01% THD+N) and reduced distortion. Its BCD process integrates high-side and low-side MOSFET power stages with independent VCCP/VCCM supplies for robust half-bridge operation.
Diagnostics are hardware-accelerated: DC offset detection and 'hot spot' monitoring operate continuously during playback; short-to-VCC/GND, open-load, and four-tier thermal warnings are reported via I²C; and CDDiag provides open-drain clipping indication. Legacy mode bypasses I²C for fixed-function operation with four preset configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 25 W @ 4 Ω, 14.4 V, 1 kHz, THD = 1% - sufficient for front-channel midrange drivers in DIN-sized head units |
| Supply Range | 3.3–18 V DC - supports start-stop battery transients and 12 V/24 V vehicle architectures without external regulators |
| D/A Resolution | 108 dB SNR - enables >20-bit effective resolution for high-fidelity audio reproduction in noise-sensitive cabins |
| Input Interface | I²S + TDM (4/8/16 CH) - allows direct connection to multi-core SoCs or DSPs without external serializer/deserializer |
| Quiescent Current | <10 mA @ 13.5 V - reduces standby power draw in always-on telematics modules |
| EMI Compliance | CISPR 25 Class 5 - meets strict automotive radiated emissions limits for integration near tuner modules |
| Thermal Resistance | Rth(j-a) = 28.5 °C/W (2s2p+vias) - defines minimum PCB copper area (≥400 mm² exposed pad + 8x thermal vias) for 125 °C max junction |
Pinout & Package
Package: VFQFPN48 (7 × 7 × 1.0 mm, exposed pad down, option D), RoHS-compliant ECOPACK2, with 48 terminals and coplanarity ≤ 0.08 mm per JEDEC MO-220.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTP (Pins 1, 47, 48) | Half-bridge high-side output | Drives speaker positive terminal; three parallel pins reduce bond-wire inductance and current density |
| OUTM (Pins 12, 13, 14) | Half-bridge low-side output | Drives speaker negative terminal; triple-pinned for thermal and EMI robustness in 25 W operation |
| VCCP / VCCM (Pins 3,4,9,10) | Separate high-/low-side supply rails | Enables independent gate drive optimization and minimizes shoot-through risk under asymmetric load conditions |
| GNDP / GNDM (Pins 5,6,7,8) | High-/low-side power ground returns | Prevents ground bounce coupling between switching legs; mandatory star-point connection to exposed pad |
| FBP / FBM (Pins 46, 15) | Feedback inputs referenced to OUTP/OUTM | Closes loop around external LC filter-ensures stability and linearity without requiring compensation components |
| I2Cdata / I2Cclk (Pins 32, 33) | Configurable I²C interface | Supports 1.8 V and 3.3 V logic levels; open-drain outputs allow bus sharing with other automotive peripherals |
| CDDiag (Pin 24) | Clipping + diagnostic status output | Open-drain signal asserts low on clipping or fault-connectable directly to MCU GPIO without level-shifting |
| HWMUTE (Pin 44) | Hardware mute control | Active-low asynchronous mute; overrides all digital controls for fail-safe audio shutdown during crash events |
Key Features
| Feature | Design Value |
|---|---|
| Integrated diagnostics with play-mode operation | Real-time open-load, short-circuit, DC offset, and thermal detection while audio is active-eliminates need for separate test tones |
| Configurable amplitude limiter | I²C-programmable soft-clipping threshold prevents speaker damage and reduces amplifier stress during transient peaks |
| Legacy mode (no-I²C) | Four factory-set configurations (gain, limiter, mute behavior) selected by enable-pin strapping-supports cost-sensitive designs without firmware overhead |
| Wide-voltage operation (3.3–18 V) | Operates directly from buck-converted 3.3 V rails or unregulated battery-removes need for intermediate LDOs in telematics modules |
| Embedded feedback loop with LC filter | Output filter included in control loop improves PSRR and reduces sensitivity to component tolerance drift over temperature |
Applications
| Car Radio Audio Amplifier | Telematics Voice Output Stage |
|---|---|
|
Use Scenario: Single-DIN head unit driving front-channel speakers with integrated DSP and tuner. IC Role / Device Role / Timing Role: Final-stage Class D amplifier receiving I²S audio from SoC; provides 25 W output with diagnostic reporting to MCU. Use Value: Eliminates external DAC and analog amplification stages-reducing BOM count by ≥4 ICs and PCB area by 35%. |
Use Scenario: In-vehicle emergency call (eCall) system requiring intelligible voice playback during crash events. IC Role / Device Role / Timing Role: Fault-tolerant audio driver with HWMUTE and thermal warning-ensures audio remains functional or fails safely. Use Value: Hardware mute and play-mode diagnostics guarantee compliance with UNECE R151 safety requirements for eCall audio integrity. |
| Noise Cancellation Signal Generator | Tone Alert Driver for ADAS |
|
Use Scenario: Active noise cancellation (ANC) module generating anti-noise waveforms synchronized to engine RPM. IC Role / Device Role / Timing Role: Precision Class D output stage accepting TDM-synchronized 192 kHz audio streams from DSP. Use Value: 192 kHz sampling support and <0.01% THD+N ensure phase-accurate anti-noise generation across 20–500 Hz cabin noise band. |
Use Scenario: Advanced Driver Assistance System (ADAS) issuing audible alerts (e.g., lane departure, blind spot). IC Role / Device Role / Timing Role: High-reliability tone generator with built-in amplitude limiting and short-circuit protection. Use Value: Configurable limiter prevents speaker burnout during repeated alert bursts; diagnostics report wiring faults before field failure. |
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 |
|---|---|---|---|
| TAS5414QRTQR | 4-channel, 12 W/channel @ 4 Ω; no integrated diagnostics or play-mode open-load detection | Suitable for multi-zone infotainment but lacks FDA903Q's eCall-ready hardware mute and thermal warning tiers | Select when channel count >1 is required and diagnostics can be implemented externally |
| MAX9877EPL+ | Single-channel, 15 W @ 4 Ω; I²C-only interface; no TDM support or legacy mode | Targeted at premium audio subsystems with tight THD specs but not certified for AEC-Q100 Grade 0 | Select only for non-automotive industrial audio where AEC-Q100 and CISPR 25 are not mandated |
Compared with TAS5414QRTQR and MAX9877EPL+, FDA903Q-V0Y uniquely combines single-channel 25 W output, AEC-Q100 Grade 0 qualification, play-mode diagnostics, and legacy mode-making it the only drop-in solution for space-constrained, safety-critical automotive voice and alert systems.
Availability
FDA903Q-V0Y is available at Aetrix Electronics and suitable for car radio head units, telematics eCall modules, and ADAS tone alert systems requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for FDA903Q-V0Y 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.
FDA903Q belongs to ST's automotive Class D amplifier product line, engineered specifically for AEC-Q100-compliant voice and alert audio systems where diagnostic integrity, wide supply range, and compact footprint are critical.
FAQ
What is the maximum safe operating voltage for FDA903Q-V0Y during load dump events?
The FDA903Q-V0Y withstands up to 35 V for 100 ms and 40 V for <400 ms per ISO 16750-2 load dump specifications with centralized suppression. Its absolute maximum VCC rating is 40 V, and internal clamping ensures no latch-up occurs under these transients when PCB layout follows ST's recommended grounding and decoupling guidelines.
Can FDA903Q-V0Y drive 2 Ω speakers, and what design considerations apply?
Yes-it is explicitly rated for 2 Ω loads. To sustain this, the PCB must provide ≥600 mm² of 2-oz copper on the exposed pad with ≥12 thermal vias (0.3 mm diameter), and the output LC filter must use low-ESR capacitors (X7R, ≥10 µF) and low-DCR inductors (≤15 mΩ) to limit peak current and thermal rise.
How does the FDA903Q-V0Y's feedback architecture differ from conventional Class D amplifiers?
Unlike standard Class D ICs that close the loop before the output filter, FDA903Q-V0Y embeds the external LC filter inside the feedback path. This eliminates phase shift-induced instability, enables flat group delay up to 20 kHz, and makes performance insensitive to ±15% inductor/capacitor tolerance-reducing qualification effort for production release.
Is the 'legacy mode' fully hardware-configurable without any I²C communication?
Yes-legacy mode disables the I²C interface entirely. Four distinct configurations (gain, limiter threshold, mute polarity, and startup behavior) are selected solely by strapping Enable1–Enable4 pins HIGH/LOW at power-on. No firmware or external controller is needed, making it ideal for cost-sensitive or safety-critical boot-time audio paths.
FDA903Q-V0Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-TFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Class D
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 25W x 1 @ 4Ohm, 31W x 1 @ 4Ohm
- Voltage - Supply:
- 3.3V ~ 18V
- Features:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 48-VFQFPN (7x7)
FDA903Q-V0Y FAQ
1.How can I place an order for FDA903Q-V0Y through Aetrix?
Please submit a Request for Quotation (RFQ) for FDA903Q-V0Y 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 FDA903Q-V0Y reliable?
The price and inventory of FDA903Q-V0Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDA903Q-V0Y is usually 5 days.
3.What payment methods are accepted for FDA903Q-V0Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDA903Q-V0Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FDA903Q-V0Y?
FDA903Q-V0Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FDA903Q-V0Y 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 FDA903Q-V0Y?
For technical support, including FDA903Q-V0Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDA903Q-V0Y requirements.
6.How does Aetrix verify that FDA903Q-V0Y is sourced from the original manufacturer or authorized distributors?
All FDA903Q-V0Y 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 FDA903Q-V0Y meets industry standards.
7.What is the process for return or replacement of FDA903Q-V0Y?
All FDA903Q-V0Y units undergo pre-shipment inspection (PSI). If there is an issue with FDA903Q-V0Y, 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 FDA903Q-V0Y part is unused and in its original packaging.
Return procedure for FDA903Q-V0Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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