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STMicroelectronics TDA7803A-ZST
- Part No.:
- TDA7803A-ZST
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- PowerSO-36 Exposed Top Pad
- Datasheet:
-
TDA7803A-ZST.pdf
- Description:
- AUDIO & BODY
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
TDA7803A-ZST from STMicroelectronics is an AEC-Q100 qualified quad-channel Class-SBI (SB-improved) automotive audio power amplifier with integrated 24-bit digital input interface, 115 dB A-weighted dynamic range, and start-stop battery compatibility down to 6 V. It delivers 4 × 27 W into 4 Ω and 4 × 47 W into 2 Ω at 14.4 V, supporting I2S/TDM up to 192 kHz for infotainment head units and premium car audio systems.
For engineers reviewing the TDA7803A-ZST datasheet, TDA7803A-ZST pinout, TDA7803A-ZST application, or TDA7803A-ZST equivalent, this device requires attention to its dual-package options (PowerSO-36 and Flexiwatt-27), I²C-configurable diagnostics, parallel mode operation, and SB-I efficiency architecture-critical for thermal management and fuel-efficient vehicle architectures.
Technical Context
The TDA7803A-ZST integrates a full 24-bit D/A converter, programmable PLL locking to 64×Fs, and independent front/rear clipping detection. Its SB-I high-efficiency architecture reduces average power dissipation by up to 50% versus Class AB under real-world audio signals while maintaining low THD+N (≤0.02% at 1 W, 4 Ω).
It supports flexible serial audio interfaces-including I2S, TDM-4ch, TDM-8ch, and TDM-16ch (8+8)-with 1.8 V/3.3 V CMOS-compatible logic levels. Diagnostics include DC/AC load detection per channel, offset monitoring, thermal muting, and configurable diagnostic pin output-all communicated via I²C bus with four selectable addresses (PowerSO-36 only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | Quad bridge (4×), fully independent amplification paths with individual mute/play control. |
| Max Output Power | 4 × 47 W @ 2 Ω, 14.4 V, 1 kHz, THD = 10% - enables high-fidelity rear-seat or subwoofer drive without external heatsinking. |
| Dynamic Range | 115 dB (A-weighted) - ensures ultra-low noise floor for high-resolution audio playback in quiet cabin environments. |
| Supply Voltage Range | 6 V to 18.5 V - supports start-stop systems and wide automotive battery transients without brownout or shutdown. |
| Digital Input Support | I2S, TDM-4/8/16ch (8+8), sample rates 44.1–192 kHz - compatible with modern DSP-based head units and multi-zone audio processors. |
| Diagnostic Capability | Per-channel DC/AC load detection, clipping, offset, and thermal fault reporting via I²C - eliminates need for external sense circuitry. |
| Efficiency Architecture | SB-I (SB-improved) Class-G-like modulation - reduces average dissipation by ~50% vs. Class AB under typical music program material. |
Pinout & Package
Package: PowerSO-36 (slug-up, thermally enhanced) - optimized for high-power automotive applications requiring efficient heat transfer to PCB copper pour or heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main supply input (6–18.5 V) | Power rail for analog/digital core and output stages; supports start-stop battery profile. |
| GND | Power ground (multiple pins) | Dedicated low-impedance return paths for analog, digital, and power sections to minimize crosstalk. |
| SDA / SCL | I²C bidirectional data/clock | Configures operating modes, gains, diagnostics, and reads fault status; 1.8 V/3.3 V tolerant. |
| EN | CMOS-compatible enable input | Active-high logic control for global standby entry/exit; synchronizes with vehicle ignition state. |
| DIAG | Programmable diagnostic output | Open-drain flag indicating aggregated fault condition; configurable per channel or system-level. |
| OUT1–OUT4 | Bridge outputs (speaker terminals) | Four fully differential, high-current MOSFET output pairs; each capable of driving 2–4 Ω loads directly. |
Key Features
| Feature | Design Value |
|---|---|
| Start-stop compatibility | Operates continuously from 6 V - meets OEM requirements for engine-off audio playback and rapid restart readiness. |
| Parallel mode function | Combines two channels into single higher-power output (e.g., 2×27 W → 1×54 W @ 4 Ω) - simplifies subwoofer or center-channel design. |
| Digital gain control | Independent per-channel digital attenuation (0–−63 dB) - enables precise level matching across zones without analog trimming. |
| Pop-free mute transitions | Hardware-controlled ramping during mute/unmute - eliminates audible click/pop in human-audible band (<20 Hz) during source switching. |
| Thermal protection with muting | On-die temperature sensing triggers gradual output reduction before shutdown - preserves audio continuity during transient overload. |
Applications
| Infotainment Head Unit | Premium Rear-Seat Entertainment |
|---|---|
Use Scenario: Central audio processor in OEM dashboard head unit delivering 4-zone output to front/rear speakers and subwoofer. IC Role / Device Role / Timing Role: Quad-channel digital-input amplifier with integrated diagnostics, replacing discrete DAC + analog amp + protection IC stack. Use Value: Reduces BOM count by 3+ components and eliminates external load-sense resistors while enabling real-time speaker health monitoring via I²C. |
Use Scenario: Dedicated rear-seat amplifier in luxury vehicles powering headrest speakers and overhead displays. IC Role / Device Role / Timing Role: High-efficiency Class-SBI driver with low quiescent current (≤35 mA in ECO mode) for always-on entertainment systems. Use Value: Enables silent operation during vehicle stop phases and extends battery runtime during parked playback without compromising SNR. |
| Start-Stop Compatible Audio System | Multi-Channel DSP-Driven Soundbar |
Use Scenario: Full-vehicle audio system designed for EU/Asian OEMs requiring uninterrupted audio during engine cranking (6–8 V dips). IC Role / Device Role / Timing Role: Primary power stage with adaptive voltage regulation and fast-recovery startup timing (≤200 ms from 6 V). Use Value: Eliminates audio dropout during auto-start sequences, meeting OEM acoustic continuity specifications (e.g., VW TL-81335). |
Use Scenario: Compact soundbar platform using TDM-16ch input to process spatial audio from TV or streaming sources. IC Role / Device Role / Timing Role: Final-stage amplifier with TDM-16 support (8+8 channels) for beamforming and virtual surround rendering. Use Value: Allows single-chip amplification of left/right/front/rear height channels without external multiplexing or clock domain translation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel automotive amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7802TR | Lower output power (4 × 22 W @ 4 Ω), no TDM-16 support, fixed I²C address (no address selection) | Suitable for cost-sensitive entry-level head units without multi-zone or high-power rear channels | Select when BOM cost > performance density; lacks parallel mode and 192 kHz support. |
| MAX9788AUB+ | Class D topology (vs. Class-SBI), lower dynamic range (105 dB), no start-stop operation below 8 V | Targeted at non-automotive consumer soundbars with stable 12 V supplies | Choose only for non-AEC-Q100 applications where thermal efficiency > battery dip tolerance. |
Compared with TDA7803A-ZST, the TDA7802TR trades diagnostic flexibility and power scalability for lower unit cost, while the MAX9788AUB+ offers higher peak efficiency but fails to meet automotive voltage transients or diagnostic depth required for OEM deployment.
Availability
TDA7803A-ZST is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop compatible audio modules, and premium multi-zone speaker management requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for TDA7803A-ZST 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 specializing in automotive-grade analog, power, and microcontroller solutions with over 30 years of automotive qualification expertise.
The TDA7803A-ZST belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-fidelity, diagnostics-rich, and energy-efficient in-vehicle audio systems compliant with ISO 26262 ASIL-B functional safety requirements.
FAQ
What package variants does the TDA7803A-ZST support?
The TDA7803A-ZST is offered in two thermally optimized packages: PowerSO-36 (slug-up, surface-mount) and Flexiwatt-27 (vertical through-hole). The ZST suffix denotes the PowerSO-36 variant with exposed thermal pad, rated for 120 W total power dissipation with proper PCB copper area.
Does the TDA7803A-ZST support I²C address configuration?
Yes - only in the PowerSO-36 package (TDA7803A-ZST), the device supports four selectable I²C addresses via hardware pins (ADDR0/ADDR1), enabling up to four identical devices on the same bus for multi-amplifier systems without address conflict.
How does the SB-I efficiency architecture differ from standard Class D?
SB-I is ST's proprietary Class-G-derived architecture that dynamically adjusts internal supply rails based on signal envelope, achieving >90% efficiency at mid-power levels while avoiding Class D EMI issues. Unlike fixed-rail Class D, it maintains linear-phase response and eliminates LC filter requirements.
Can the TDA7803A-ZST drive 1 Ω loads?
No - the device is characterized and guaranteed for 2 Ω minimum load impedance. Driving 1 Ω risks exceeding safe operating area limits, triggering thermal shutdown or permanent damage. ST specifies absolute maximum continuous output current as 12 A per channel, consistent with 2 Ω operation at 14.4 V.
TDA7803A-ZST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- PowerSO-36 Exposed Top Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Audio ADC/Amplifier
- Applications:
- Audio
- Number of Channels:
- 4
- Interface:
- I2C, I2S, TDM
- Voltage - Supply:
- 6V ~ 18.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Specifications:
- 115dB
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
TDA7803A-ZST FAQ
1.How can I place an order for TDA7803A-ZST through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7803A-ZST 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 TDA7803A-ZST reliable?
The price and inventory of TDA7803A-ZST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7803A-ZST is usually 5 days.
3.What payment methods are accepted for TDA7803A-ZST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7803A-ZST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7803A-ZST?
TDA7803A-ZST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7803A-ZST 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 TDA7803A-ZST?
For technical support, including TDA7803A-ZST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7803A-ZST requirements.
6.How does Aetrix verify that TDA7803A-ZST is sourced from the original manufacturer or authorized distributors?
All TDA7803A-ZST 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 TDA7803A-ZST meets industry standards.
7.What is the process for return or replacement of TDA7803A-ZST?
All TDA7803A-ZST units undergo pre-shipment inspection (PSI). If there is an issue with TDA7803A-ZST, 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 TDA7803A-ZST part is unused and in its original packaging.
Return procedure for TDA7803A-ZST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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