My Inquiry
My Account
STMicroelectronics TDA7803A-48X
- Part No.:
- TDA7803A-48X
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
TDA7803A-48X.pdf
- Description:
- HIGH EFFICIENCY DIGITAL INPUT AU
- Quantity:
- Payment:
- Shipping:
Inventory:341
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TDA7803A from STMicroelectronics is an AEC-Q100 qualified quad-channel Class-SBI (improved) automotive audio power amplifier with integrated 24-bit digital processing, 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 digital inputs up to 192 kHz for in-vehicle infotainment systems.
For engineers reviewing the TDA7803A datasheet, TDA7803A pinout, TDA7803A application, or TDA7803A equivalent, key selection considerations include its SB-I high-efficiency architecture, I²C-configurable diagnostics (DC/AC load detection, clipping, offset), flexible serial data port (1.8 V/3.3 V), and thermal protection with pop-free mute transitions.
Technical Context
The TDA7803A integrates a full 24-bit D/A converter, programmable PLL locking to 64×Fs input clocks, and four independent MOSFET output stages in BCD technology. Its SB-I efficiency mode reduces average power dissipation by up to 50% versus Class AB under real-world audio signals.
It supports parallel mode operation, independent front/rear play/mute control, selectable digital gains for low-noise line-out, and comprehensive diagnostics-including short-to-GND, short-to-Vs, open-load, and soft-short detection-communicated via I²C bus with four address options (PowerSO-36 only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 27 W @ 4 Ω, 14.4 V, 1 kHz, THD = 10% - sufficient for mid-range speaker driving in compact automotive head units. |
| Dynamic Range | 115 dB (A-weighted) - enables high-fidelity reproduction with minimal noise floor interference in cabin environments. |
| Supply Voltage Range | 6 V to 18.5 V - ensures uninterrupted operation during engine cranking and start-stop cycles. |
| Digital Input Support | I²S, TDM 4/8/16-ch (8+8) @ 44.1/48/96/192 kHz - compatible with modern DSP-based audio processors and multi-zone architectures. |
| Diagnostic Capability | Per-channel DC/AC load detection, clipping, offset, and thermal fault reporting via I²C - enables real-time speaker health monitoring without external circuitry. |
| Efficiency Architecture | SB-I (Class-SBI improved) - dynamically modulates supply rails to reduce quiescent and average power dissipation vs. fixed-rail Class AB. |
| Interface Voltage | I²C & serial data port compatible with 1.8 V and 3.3 V logic - simplifies integration with low-voltage microcontrollers and SoCs. |
Pinout & Package
Package: PowerSO-36 (slug-up) - thermally enhanced exposed pad for high-power automotive amplifier applications requiring efficient heat transfer to PCB heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Accepts 6–18.5 V; powers internal regulators and output stage; supports start-stop battery profile. |
| GND | Power and signal ground reference | Common return path for analog/digital sections; requires low-impedance PCB layout to minimize noise coupling. |
| SDA / SCL | I²C bidirectional data/clock | Configures device settings, reads diagnostics, selects addresses (4 options); 1.8 V/3.3 V tolerant. |
| EN | CMOS-compatible enable input | Active-high logic control for global power-on/off; enables system-level sleep/wake coordination. |
| DIAG | Programmable diagnostic output | Open-drain status pin indicating fault conditions (e.g., thermal shutdown, load error) per user-defined mapping. |
| LRCLK / BCLK / DIN | Digital audio interface signals | Supports I²S/TDM formats; BCLK up to 12.288 MHz (192 kHz × 64); LRCLK edge-aligned with data valid window. |
| OUT1–OUT4 | Quad bridge output terminals | Each drives one speaker channel in bridged configuration; capable of 2 Ω loads with thermal derating. |
Key Features
| Feature | Design Value |
|---|---|
| Start-stop compatibility | Operates continuously from 6 V supply - eliminates audio dropouts during engine restart in eco-mode vehicles. |
| Pop-free mute transitions | Hardware-controlled ramping prevents audible transients when enabling/disabling channels - critical for premium UX in OEM systems. |
| Independent front/rear clipping detection | Real-time per-channel overload monitoring with I²C-reportable flags - allows adaptive volume limiting or driver feedback. |
| Flexible serial data port | Single hardware interface supports I²S, TDM 4/8/16-ch - reduces PCB routing complexity and enables scalable audio zone expansion. |
| Thermal protection with muting | Automatic channel muting upon junction temperature > 150 °C, with hysteresis recovery - prevents permanent damage while maintaining partial system functionality. |
Applications
| Infotainment Head Unit | Digital Signal Processor Interface |
|---|---|
Use Scenario: Integrated amplifier in OEM or aftermarket automotive head units delivering audio to four speakers. IC Role / Device Role / Timing Role: Quad-channel digital-input power amplifier with embedded D/A conversion and diagnostics. Use Value: Eliminates external DAC and discrete protection circuitry, reducing BOM count and board space while enabling speaker-level fault reporting. | Use Scenario: Direct connection to automotive-grade DSPs (e.g., TI TMS320C55x, NXP i.MX Audio DSP) outputting TDM or I²S streams. IC Role / Device Role / Timing Role: Final-stage digital-to-analog power conversion with sample-rate agnostic PLL synchronization. Use Value: Supports 44.1–192 kHz sampling without clock domain crossing issues; maintains low group delay (< 100 µs) across all modes. |
| Rear Seat Entertainment | Multi-Zone Audio Distribution |
Use Scenario: Amplification for rear-seat displays or wireless headphones with independent volume and mute control. IC Role / Device Role / Timing Role: Dual-zone amplifier using front/rear channel grouping with independent play/mute registers. Use Value: Enables simultaneous but isolated audio playback (e.g., movies for passengers, navigation for driver) without cross-talk or shared gain conflicts. | Use Scenario: Central audio hub distributing amplified outputs to multiple zones (front, rear, subwoofer) in premium vehicles. IC Role / Device Role / Timing Role: Configurable TDM 16-ch receiver (8+8) with parallel mode support for channel pairing. Use Value: Allows two TDA7803A devices to operate synchronously as an 8-channel solution with matched timing and coordinated diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital-input automotive amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7802 | Lacks SB-I efficiency mode; lower max output (4 × 22 W @ 4 Ω); no TDM 16-ch support; same PowerSO-36 package. | Suitable for cost-sensitive entry-level head units where peak power and advanced diagnostics are secondary. | Select when thermal budget allows higher dissipation and diagnostic granularity is not required. |
| MAX9744 | Class D architecture; no integrated D/A; analog inputs only; lower dynamic range (105 dB); I²C-only control (no TDM/I²S). | Targeted at analog-source systems (e.g., legacy radio tuners) with simpler signal chains and less stringent SNR requirements. | Choose only if existing design uses analog audio paths and does not require digital input or AEC-Q100 diagnostics. |
Compared with TDA7802 and MAX9744, the TDA7803A uniquely combines SB-I efficiency, 24-bit digital processing, and comprehensive per-channel diagnostics - making it optimal for next-generation start-stop compatible infotainment platforms demanding both fidelity and functional safety awareness.
Availability
TDA7803A is available at Aetrix Electronics and suitable for automotive infotainment head units, digital signal processor interface modules, and multi-zone audio distribution systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TDA7803A 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, industrial, and power management ICs, with deep expertise in high-reliability analog and mixed-signal solutions.
The TDA7803A belongs to ST's automotive audio amplifier product line, engineered specifically for digital-input, start-stop compatible vehicle audio systems requiring high efficiency, diagnostic intelligence, and robust EMC performance.
FAQ
What is the minimum supply voltage for continuous operation?
The TDA7803A operates continuously down to 6 V, enabling reliable audio playback during engine cranking and start-stop cycles typical in modern fuel-efficient vehicles. This is verified per AEC-Q100 stress testing and documented in Section 5 ("Operation compatibility vs. battery") of the datasheet.
Does the TDA7803A support TDM 16-channel input?
Yes - the TDA7803A supports TDM 16-channel format (8+8 channels) as defined in Section 8.3 of the datasheet. It accepts interleaved left/right data on a single DIN line with configurable slot allocation, allowing flexible routing from multi-core DSPs or audio SoCs.
How does the SB-I efficiency mode differ from standard Class D?
SB-I is ST's proprietary Class-SBI (improved) architecture that dynamically adjusts rail voltages based on instantaneous signal envelope - unlike fixed-rail Class D - achieving up to 50% lower average power dissipation than Class AB while avoiding EMI concerns associated with high-frequency switching in conventional Class D.
Can the DIAG pin be configured for specific fault types?
Yes - the DIAG pin is programmable via I²C register DB6 (Subaddress I0010110h) to assert on selected fault combinations including thermal shutdown, open-load, short-circuit, or clipping. Configuration is non-volatile after power-on reset and detailed in Table 29 of the datasheet.
TDA7803A-48X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 27-Flexiwatt, Formed Leads
- 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:
- Through Hole
- Grade:
- Automotive
TDA7803A-48X FAQ
1.How can I place an order for TDA7803A-48X through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7803A-48X 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-48X reliable?
The price and inventory of TDA7803A-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7803A-48X is usually 5 days.
3.What payment methods are accepted for TDA7803A-48X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7803A-48X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7803A-48X?
TDA7803A-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7803A-48X 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-48X?
For technical support, including TDA7803A-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7803A-48X requirements.
6.How does Aetrix verify that TDA7803A-48X is sourced from the original manufacturer or authorized distributors?
All TDA7803A-48X 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-48X meets industry standards.
7.What is the process for return or replacement of TDA7803A-48X?
All TDA7803A-48X units undergo pre-shipment inspection (PSI). If there is an issue with TDA7803A-48X, 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-48X part is unused and in its original packaging.
Return procedure for TDA7803A-48X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA7803A-48X Tags
-
SA571DR2G
onsemi
-
ADAU7002ACBZ-R7
Analog Devices Inc.
-
DRV135UA/2K5
Texas Instruments
-
DRV134UA/1K
Texas Instruments
-
DRV134PA
Texas Instruments
-
DRV134UA
Texas Instruments
-
DRV135UA
Texas Instruments
-
SA572DR2G
onsemi
-
PGA2311U/1K
Texas Instruments
-
SI8244BB-D-IS1R
Skyworks Solutions Inc.
-
CS8416K-CZZR
Cirrus Logic Inc.
-
SRC4392IPFBR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
