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STMicroelectronics TDA7802
- Part No.:
- TDA7802
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
TDA7802.pdf
- Description:
- IC AMP SB QUAD 72W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:336
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Product details
Overview
TDA7802 from STMicroelectronics is a quad-channel Class-AB digital-input audio power amplifier with integrated 24-bit DAC, AEC-Q100 qualified for automotive use, delivering 4 × 28 W into 4 Ω at 14.4 V (THD = 10%), 110 dB A-weighted dynamic range, and start-stop battery compatibility down to 6 V - deployed in infotainment head units and premium car audio systems.
For engineers reviewing the TDA7802 datasheet, TDA7802 pinout, TDA7802 application, or TDA7802 equivalent, key selection considerations include I²S/TDM serial interface support (44.1–192 kHz), programmable diagnostics (DC/AC load detection, clipping, thermal warning), flexible gain control, and PowerSO36 vs. Flexiwatt27 package-dependent I²C addressability and 1 Ω driving capability.
Technical Context
The TDA7802 integrates a full 24-bit D/A converter, PLL synchronized to 50×Fs or 64×Fs input clocks, and four fully balanced MOSFET output stages in BCD technology. It supports I²S, TDM-4Ch, TDM-8Ch, and TDM-16Ch serial data formats with 1.8 V/3.3 V logic compatibility.
Diagnostic functions include per-channel DC offset detection, independent front/rear clipping monitoring, open-drain CDdiag reporting overcurrent, thermal events, POR, and speaker short conditions - all accessible via I²C bus (PowerSO36) or optional hardware mute/unmute control (Flexiwatt27).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 independent bridge-tied-load (BTL) channels for front/rear left/right amplification |
| Max Output Power | 4 × 72 W into 2 Ω @ 14.4 V - enables high-SPL speaker drive without external heatsinking in compact layouts |
| Dynamic Range | 110 dB (A-weighted) - ensures low-noise audio reproduction with >115 dB SNR from integrated DAC |
| Supply Voltage Range | 6 V to 18 V - supports automotive start-stop operation and brown-out resilience during cranking |
| Sample Rates | 44.1 / 48 / 96 / 192 kHz - compatible with CD, streaming, and high-res audio sources |
| Diagnostic Coverage | Per-channel DC offset, AC load, thermal warning, overcurrent, and POR reporting via I²C or CDdiag pin |
| Package Options | PowerSO36 (supports I²C, 1 Ω drive, 4 selectable addresses) and Flexiwatt27 (hardware-only control) |
Pinout & Package
Available in two thermally optimized automotive packages: PowerSO36 (slug-up, exposed thermal pad) and Flexiwatt27 (vertical or SMD). PowerSO36 enables full I²C configurability and 1 Ω speaker drive; Flexiwatt27 supports hardware-only mode with simplified control.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| OUT1+ / OUT1− | Channel 1 (Left Front) BTL outputs | Differential power outputs capable of ±14 V swing into 4 Ω; require symmetric PCB layout for EMI control |
| OUT2+ / OUT2− | Channel 2 (Left Rear) BTL outputs | Matched to OUT1± for stereo rear channel; share VCC12 and PWGND1/2 for thermal coupling |
| OUT3+ / OUT3− | Channel 3 (Right Front) BTL outputs | Independent from front-left pair; routed with separate ground plane to avoid crosstalk |
| OUT4+ / OUT4− | Channel 4 (Right Rear) BTL outputs | Paired with OUT3± under VCC34 supply rail; supports dual-zone rear seat audio |
| CDdiag | Open-drain diagnostic status output | Asserts low on thermal warning, overcurrent, DC offset, or short-circuit - drives LED or microcontroller interrupt |
| PLLen | PLL enable / loop filter input | Active-high enable for internal PLL; external RC filter sets lock bandwidth for jitter suppression |
| SCLlen / SDAlm | I²C clock/data (PowerSO36) or legacy mute control | In PowerSO36: standard I²C interface; in Flexiwatt27: hardware mute/unmute with pull-up/pull-down options |
| WS / SCK / SD13 / SD24 | I²S/TDM serial audio interface | Supports left-justified, I²S, and TDM modes up to 16 channels - eliminates need for external serializer |
Key Features
| Feature | Design Value |
|---|---|
| SB-I High-Efficiency Operation | Reduces average dissipation by up to 50% vs. Class AB under real music signals - lowers heatsink mass and improves thermal margin |
| Integrated 24-bit DAC | Eliminates external DAC and associated analog routing - simplifies layout and improves SNR to 115 dB |
| Start-Stop Compatibility | Stable operation from 6 V to 18 V - maintains audio playback during engine cranking without dropout or reset |
| Per-Channel Diagnostics | Real-time detection of speaker opens, shorts to VCC/GND, thermal overload, and clipping - enables predictive maintenance |
| Flexible Gain Control | Four selectable line-out gains - allows optimization of signal-to-noise ratio across source types (e.g., low-level tuner vs. high-level DSP) |
Applications
| Automotive Infotainment Head Unit | Premium OEM Audio System |
|---|---|
|
Use Scenario: Central audio processor in mid-to-high-tier vehicles with AM/FM, Bluetooth, and navigation audio routing. IC Role / Device Role / Timing Role: Quad-channel BTL amplifier with integrated DAC and diagnostics - replaces discrete DAC + analog amp + protection IC stack. Use Value: Reduces BOM count by 3–4 components and PCB area by >25%, while enabling real-time speaker health monitoring via I²C. |
Use Scenario: Front/rear zone amplification in luxury vehicles with active noise cancellation and multi-zone volume control. IC Role / Device Role / Timing Role: Digital-input power stage with 192 kHz support and independent channel clipping detection - synchronizes with vehicle domain controller timing. Use Value: Enables time-aligned audio processing across zones and supports firmware-updatable diagnostics without hardware change. |
| Aftermarket Navigation Radio | Start-Stop Compatible Audio Module |
|
Use Scenario: Compact replacement radio with digital audio inputs (USB, SPDIF) and factory integration via CAN bus-linked audio control. IC Role / Device Role / Timing Role: Direct I²S/TDM interface to SoC audio subsystem - handles sample rate conversion internally via PLL. Use Value: Eliminates external SRC IC and reduces latency by 2–3 sample periods versus analog chain solutions. |
Use Scenario: Low-voltage audio module for hybrid/electric vehicles requiring uninterrupted playback during 6–12 V battery transients. IC Role / Device Role / Timing Role: Power amplifier with brown-out resilient biasing and fast wake-up from sleep mode (<10 ms). Use Value: Maintains audio continuity during engine restart without audible pop/click or reinitialization delay. |
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 |
|---|---|---|---|
| TDA7801 | 3-channel variant (no rear-right channel); identical DAC, diagnostics, and SB-I efficiency | Limited to 3-speaker configurations (e.g., front L/R + subwoofer); no rear zone support | Select when rear channel count is reduced and PCB space must be minimized |
| TDA7803 | Enhanced diagnostics including impedance measurement; adds SPI interface alongside I²C | Supports speaker aging analysis and adaptive EQ tuning - requires additional MCU firmware support | Select for next-gen systems requiring speaker characterization and predictive failure modeling |
Compared with TDA7801 and TDA7803, the TDA7802 uniquely balances full 4-channel capability, production-proven AEC-Q100 reliability, and minimal external component count - making it optimal for cost-sensitive yet feature-complete automotive audio platforms.
Availability
TDA7802 is available at Aetrix Electronics and suitable for automotive infotainment head units, premium OEM audio systems, and start-stop compatible audio modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for TDA7802 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.
The TDA7802 belongs to ST's automotive audio power amplifier product line, engineered specifically for high-fidelity, diagnostics-rich, and thermally efficient in-vehicle entertainment systems operating under harsh electrical conditions.
FAQ
What package options are available for the TDA7802 and how do they differ functionally?
The TDA7802 is offered in PowerSO36 and Flexiwatt27 (vertical/SMD) packages. PowerSO36 supports full I²C configuration, four selectable I²C addresses, and 1 Ω speaker driving capability. Flexiwatt27 uses hardware-only control (no I²C), lacks address selection, and does not support 1 Ω loads - making PowerSO36 mandatory for advanced diagnostics and low-impedance applications.
Does the TDA7802 support hardware mute, and how is it implemented?
Yes - hardware mute is supported in both packages. In Flexiwatt27, mute is controlled via dedicated pins (SDAlm and SCLlen) configured as logic inputs. In PowerSO36, the same pins serve dual roles: I²C data/clock in software mode, or hardware mute/unmute when I²C is disabled. The UNMUTEhw pin (PowerSO36 only) provides an additional independent hardware unmute path.
How does the SB-I efficiency architecture reduce thermal load compared to traditional Class AB?
SB-I dynamically adjusts output stage bias based on instantaneous signal envelope, reducing quiescent current during low-amplitude passages. Under typical music signals, this cuts average power dissipation by up to 50% versus fixed-bias Class AB - directly lowering junction temperature and allowing smaller heatsinks or higher channel density in constrained enclosures.
Can the TDA7802 operate with a 3.3 V I²S interface while powered from a 14.4 V battery supply?
Yes - the TDA7802 features separate 3.3 V analog (A3V3) and digital (D3V3) regulator inputs with internal LDOs. Its I²S/TDM interface pins (WS, SCK, SD13, SD24) are 1.8 V/3.3 V tolerant and fully compatible with 3.3 V logic levels, even when VCC12/VCC34 rails operate at 14.4 V. No level-shifting circuitry is required.
TDA7802 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 27-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Audio Amplifier
- Applications:
- Audio
- Number of Channels:
- 4
- Interface:
- I2C
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Specifications:
- 115dB
- Mounting Type:
- Through Hole
- Grade:
- Automotive
TDA7802 FAQ
1.How can I place an order for TDA7802 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7802 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 TDA7802 reliable?
The price and inventory of TDA7802 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7802 is usually 5 days.
3.What payment methods are accepted for TDA7802?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7802 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7802?
TDA7802 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7802 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 TDA7802?
For technical support, including TDA7802 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7802 requirements.
6.How does Aetrix verify that TDA7802 is sourced from the original manufacturer or authorized distributors?
All TDA7802 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 TDA7802 meets industry standards.
7.What is the process for return or replacement of TDA7802?
All TDA7802 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7802, 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 TDA7802 part is unused and in its original packaging.
Return procedure for TDA7802:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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