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STMicroelectronics TDA7803A-ZSX
- Part No.:
- TDA7803A-ZSX
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- PowerSO-36 Exposed Top Pad
- Datasheet:
-
TDA7803A-ZSX.pdf
- Description:
- IC POWER AMPLIFIER 36POWERSO
- Quantity:
- Payment:
- Shipping:
Inventory:4,820
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Product details
Overview
TDA7803A-ZSX from STMicroelectronics is a quad-channel Class-SBI (improved) automotive audio power amplifier with integrated 24-bit digital input interface, AEC-Q100 qualification, 115 dB A-weighted dynamic range, and start-stop battery compatibility down to 6 V. It delivers 4 × 27 W into 4 Ω at 14.4 V (1 kHz, THD = 10%) and supports I2S/TDM serial audio formats up to 192 kHz for in-vehicle infotainment systems.
For engineers reviewing the TDA7803A-ZSX datasheet, TDA7803A-ZSX pinout, TDA7803A-ZSX application, or TDA7803A-ZSX equivalent, key selection criteria include diagnostic capability per channel via I²C, parallel mode operation for higher output, flexible digital gain control, thermal protection behavior, and SB-I efficiency optimization for uncorrelated audio signals under real-world vehicle supply profiles.
Technical Context
The TDA7803A-ZSX integrates a full 24-bit D/A converter, programmable PLL locking to 64×Fs input clocks, and four independent MOSFET bridge output stages in BCD technology. Its SB-I architecture dynamically adjusts rail voltage to minimize quiescent dissipation during low-average-power audio segments.
It implements dual-stage diagnostics: turn-on detection (open/short load, DC offset) and permanent monitoring (AC load integrity, clipping, thermal status), all reported over a 1.8 V/3.3 V I²C bus with four selectable addresses. The device operates across 6–18 V supply and supports mute/unmute transitions with pop-free behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 independent bridge-tied-load (BTL) channels for front/rear speaker driving |
| Max Output Power | 4 × 47 W @ 2 Ω, 14.4 V, 1 kHz, THD = 10% - enables high-SPL cabin audio without external heatsinking |
| Dynamic Range | 115 dB (A-weighted) - ensures resolution of low-level audio detail in noisy automotive environments |
| Supply Voltage Range | 6 V to 18 V - supports start-stop battery profile and brown-out resilience in 12 V systems |
| Digital Audio Interface | I²S, TDM 4/8/16-ch (8+8) at 44.1/48/96/192 kHz - compatible with modern DSP-based head units and ADAS audio routing |
| Diagnostic Coverage | Per-channel DC/AC load detection, clipping, thermal muting, and offset monitoring - reduces need for external fault-sensing circuitry |
| Control Interface | I²C bus (1.8 V/3.3 V compatible) with 4 address options - allows daisy-chaining multiple amplifiers on single bus |
Pinout & Package
Package: Flexiwatt 27 (vertical, through-hole) - thermally enhanced package with exposed backside slug for direct PCB heatsinking; RoHS-compliant, AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Accepts 6–18 V; powers internal regulators and output stage; enables start-stop operation |
| GND | Power ground reference | Low-impedance return path for output current and analog/digital sections; critical for EMI suppression |
| OUT1+/OUT1− | Channel 1 BTL output pair | Drives front left speaker directly; supports 2 Ω minimum load with thermal foldback |
| OUT2+/OUT2− | Channel 2 BTL output pair | Drives front right speaker; independent clipping detection and mute control |
| OUT3+/OUT3− | Channel 3 BTL output pair | Drives rear left speaker; configurable gain and diagnostic reporting via I²C |
| OUT4+/OUT4− | Channel 4 BTL output pair | Drives rear right speaker; supports parallel mode with CH3 for 2-channel high-power mode |
| SDA/SCL | I²C bidirectional data/clock | 1.8 V/3.3 V tolerant; used for configuration, diagnostics readback, and firmware updates |
| EN | CMOS-compatible enable input | Active-high logic control for global standby entry/exit; synchronizes with vehicle ignition state |
| DIAG | Programmable diagnostic output pin | Open-drain output signaling aggregated fault status; configurable per fault priority level |
| CLK/MCLK | Master clock input | Accepts 64×Fs (e.g., 3.072 MHz @ 48 kHz); feeds internal PLL for jitter-tolerant audio timing |
Key Features
| Feature | Design Value |
|---|---|
| SB-I High-Efficiency Operation | Reduces average power dissipation by up to 50% vs. Class AB under real music signals - extends thermal margin and reduces heatsink size |
| Per-Channel Digital Gain Control | Independent 0–24 dB adjustment per channel - enables precise acoustic tuning without analog trim components |
| Start-Stop Compatible Supply Range | Stable operation from 6 V - eliminates audio dropout during engine cranking and idle-stop cycles |
| Integrated Offset & Clipping Detectors | Real-time DC offset detection (< ±10 mV) and front/rear-specific clipping flags - prevents speaker damage and enables adaptive limiter response |
| Pop-Free Mute Transitions | Hardware-controlled ramping of output bias during mute/play switching - eliminates audible transients without software intervention |
Applications
| Infotainment Head Unit Amplifier | Digital Cabin Sound System |
|---|---|
Use Scenario: Integrated audio amplifier in OEM head units delivering 4-channel output to door and parcel shelf speakers. IC Role / Device Role / Timing Role: Quad BTL power stage with embedded D/A conversion and I²C-configurable diagnostics - replaces discrete DAC + analog amp + fault monitor chain. Use Value: Reduces BOM count by 3+ ICs and eliminates external thermal sensors while maintaining AEC-Q100 compliance and 115 dB SNR. |
Use Scenario: Central audio hub in premium vehicles supporting multi-zone playback, active noise cancellation feedback, and voice assistant audio routing. IC Role / Device Role / Timing Role: Digital-input amplifier with TDM-16 support and per-channel diagnostic reporting - serves as endpoint for DSP audio streams and fault telemetry. Use Value: Enables synchronized 8+8 channel processing with deterministic latency and real-time speaker health monitoring over shared I²C bus. |
| Start-Stop Optimized Rear Seat Entertainment | Compact Automotive Subwoofer Driver |
Use Scenario: Audio subsystem for rear-seat tablets or displays powered from vehicle battery with frequent voltage dips during engine restart. IC Role / Device Role / Timing Role: Low-voltage-tolerant quad amplifier with automatic mute-on-dip and fast recovery - maintains audio continuity during 6–10 V transients. Use Value: Eliminates need for external DC-DC pre-regulator and associated filtering, reducing footprint and cost in space-constrained mounting locations. |
Use Scenario: High-current driver for 8–12 inch subwoofers in compact SUVs where thermal envelope limits heatsink volume. IC Role / Device Role / Timing Role: Parallel-mode capable amplifier (CH3+CH4) delivering >90 W into 2 Ω with SB-I efficiency - minimizes junction temperature rise during bass-heavy content. Use Value: Achieves 2 Ω stability and thermal foldback without external current limiting, enabling single-package solution for subwoofer channel. |
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 × 18 W @ 4 Ω), no TDM-16 support, fixed I²C address | Suitable for entry-level audio systems without multi-zone or high-SPL requirements | Select when cost sensitivity outweighs need for parallel mode, 192 kHz support, or diagnostic granularity |
| MAX9768AUB+ | Class D topology, 4 × 25 W @ 4 Ω, no integrated D/A, requires external I²S-to-analog conversion | Used in designs with separate DSP and analog signal chain; lacks SB-I efficiency optimization | Choose when existing architecture uses discrete DACs and thermal design prioritizes peak efficiency over average dissipation reduction |
Compared with TDA7803A-ZSX, TDA7802TR trades diagnostic flexibility and power scalability for lower unit cost, while MAX9768AUB+ shifts complexity to external signal conditioning but offers higher peak efficiency at the expense of integrated audio processing and start-stop robustness.
Availability
TDA7803A-ZSX is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop compatible cabin audio modules, and digital rear-seat entertainment requiring stable component supply with long-term automotive lifecycle support.
Supply support for TDA7803A-ZSX 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 broad AEC-Q100 product portfolio and vertical manufacturing capability.
The TDA7803A-ZSX belongs to ST's TDA7xxx automotive audio amplifier family, designed specifically for digital-input, high-fidelity, thermally efficient in-vehicle amplification with integrated diagnostics and start-stop resilience.
FAQ
What is the minimum supply voltage for continuous operation?
The TDA7803A-ZSX operates continuously from 6 V to 18 V. At 6 V, it delivers reduced output power (e.g., ~4 × 12 W @ 4 Ω) while maintaining full functionality including diagnostics, I²C communication, and pop-free mute transitions - validated per AEC-Q100 transient test profiles.
Does the device support TDM-16 format with 8+8 channel interleaving?
Yes. The TDA7803A-ZSX natively supports TDM-16 (8+8) format per its datasheet Section 8.3 and Figure 40. It accepts 16-channel time-division multiplexed data on a single data line with frame sync, enabling connection to multi-DSP architectures without external demultiplexing.
How does the SB-I efficiency mode differ from standard Class D operation?
SB-I dynamically modulates the output stage supply rails based on instantaneous audio envelope, unlike fixed-rail Class D. This reduces average power dissipation by up to 50% under real-world music signals while preserving full 115 dB dynamic range and avoiding PWM-related EMI spikes common in conventional Class D topologies.
Can the DIAG pin be configured to report only critical faults?
Yes. The DIAG pin behavior is programmable via I²C register DB5 (bit 7). It can be set to assert on any fault, only thermal/overcurrent events, or only startup failures - allowing system-level fault prioritization without polling registers continuously.
TDA7803A-ZSX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- PowerSO-36 Exposed Top Pad
- Packaging:
- Tube
- 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-ZSX FAQ
1.How can I place an order for TDA7803A-ZSX through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7803A-ZSX 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-ZSX reliable?
The price and inventory of TDA7803A-ZSX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7803A-ZSX is usually 5 days.
3.What payment methods are accepted for TDA7803A-ZSX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7803A-ZSX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7803A-ZSX?
TDA7803A-ZSX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7803A-ZSX 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-ZSX?
For technical support, including TDA7803A-ZSX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7803A-ZSX requirements.
6.How does Aetrix verify that TDA7803A-ZSX is sourced from the original manufacturer or authorized distributors?
All TDA7803A-ZSX 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-ZSX meets industry standards.
7.What is the process for return or replacement of TDA7803A-ZSX?
All TDA7803A-ZSX units undergo pre-shipment inspection (PSI). If there is an issue with TDA7803A-ZSX, 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-ZSX part is unused and in its original packaging.
Return procedure for TDA7803A-ZSX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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