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STMicroelectronics TDA7802SMTR
- Part No.:
- TDA7802SMTR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- -
- Datasheet:
-
TDA7802SMTR.pdf
- Description:
- IC AMP D QUAD 72W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:292
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Product details
Overview
TDA7802SMTR from STMicroelectronics is a quad-channel Class AB digital-input audio power amplifier in Flexiwatt27 SMD package, delivering 4 × 28 W into 4 Ω at 14.4 V with 110 dB A-weighted dynamic range, 24-bit resolution, and AEC-Q100 Rev. G qualification for automotive start-stop systems.
For engineers reviewing the TDA7802SMTR datasheet, TDA7802SMTR pinout, TDA7802SMTR application, or TDA7802SMTR equivalent, key selection criteria include I²S/TDM serial interface support (44.1–192 kHz), independent front/rear clipping detection, programmable diagnostic pin (CDdiag), 1.8 V/3.3 V logic compatibility, and 6 V minimum operating voltage for battery-profile robustness.
Technical Context
The TDA7802 integrates a full 24-bit D/A converter, programmable PLL (locking to 50×Fs or 64×Fs), and four fully balanced MOSFET output stages in BCD technology. It supports flexible serial data formats including I²S, TDM-4Ch, TDM-8Ch, and TDM-16Ch with separate SD13/SD24 data lanes.
Diagnostics are implemented via I²C-controlled DC/AC load detection, thermal warning, POR status, and open-drain CDdiag pin reporting overcurrent, short-to-rail, and offset faults. Mode control includes both full I²C (with 4 selectable addresses) and optional hardware-only mute/unmute (UNMUTEhw) operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 28 W @ 4 Ω, 14.4 V, 1 kHz, THD = 10% - sufficient for mid-power automotive head units without external heatsinking |
| Dynamic Range | 110 dB (A-weighted) - enables high-fidelity audio reproduction with low background noise floor |
| Supply Voltage Range | 6 V to 18 V - supports start-stop battery profiles and wide automotive voltage transients |
| Sample Rates | 44.1 / 48 / 96 / 192 kHz - compatible with CD, streaming, and high-res audio sources |
| Interface Logic | 1.8 V / 3.3 V CMOS-compatible - interoperable with modern SoCs and microcontrollers |
| Thermal Protection | Integrated thermal shutdown with hysteresis - prevents latch-up during sustained high-power operation |
| AEC-Q100 Grade | Qualified per Rev. G - validated for automotive temperature range (−40 °C to +105 °C ambient) |
Pinout & Package
Package: Flexiwatt27 (SMD), 27-pin vertical surface-mount package with exposed thermal tab (TAB connected to GND), ECOPACK® compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 TAB | Thermal ground connection | Direct mechanical and electrical tie to PCB ground plane for thermal dissipation and EMI reduction |
| 2 PLLen | PLL loop filter / enable input | Active-high enable controlling internal PLL lock; also accepts RC filter for frequency stabilization |
| 5 WS | I²S word select | Indicates left/right channel framing on serial bus; level-sensitive, synchronous with SCK |
| 11 SCK | I²S serial clock | Master clock input for serial audio data transfer; supports up to 192 kHz sample rate timing |
| 13 SD13 | I²S/TDM data for channels 1 & 3 | Time-division multiplexed input carrying left-front and right-front audio data |
| 14 DGND | Digital ground reference | Isolated return path for digital logic and I²C/I²S interfaces to minimize coupling noise |
| 23 OUT1+ | Channel 1 positive output | High-side driver output for left-front speaker; requires external LC filter before speaker connection |
| 27 SCLlen | I²C clock / legacy enable | Configurable as I²C clock input or hardware enable signal depending on mode configuration |
Key Features
| Feature | Design Value |
|---|---|
| SB-I high-efficiency architecture | Reduces average dissipation by up to 50% vs. conventional Class AB under real music signals, easing thermal design |
| Independent front/rear clipping detection | Per-channel overload monitoring enables dynamic gain limiting without global mute activation |
| Programmable diagnostic pin (CDdiag) | Open-drain output encoding multiple fault types (short, thermal, DC offset) for MCU polling or interrupt signaling |
| Flexible load capability | Drives 2 Ω loads (max 4 × 72 W) and 4 Ω loads (4 × 28 W) - supports dual-voice-coil and multi-impedance speakers |
| Offset detector in play/mute modes | Monitors DC bias on outputs during active playback and standby to prevent speaker damage from residual voltage |
Applications
| Automotive Head Unit | Start-Stop Compatible Infotainment |
|---|---|
Use Scenario: Integrated 4-channel audio system in OEM dashboard head units with digital source inputs. IC Role / Device Role / Timing Role: Quad bridge amplifier receiving I²S/TDM streams directly from SoC; provides analog speaker drive with diagnostics. Use Value: Eliminates external DAC and reduces BOM count while maintaining 110 dB dynamic range and AEC-Q100 compliance. | Use Scenario: Audio subsystem in vehicles with engine auto-stop functionality requiring stable operation down to 6 V. IC Role / Device Role / Timing Role: Power amplifier with brown-out resilient biasing and fast wake-up from low-voltage sleep states. Use Value: Maintains audio continuity during stop-start cycles without audible dropouts or reset-induced pops. |
| Diagnostic-Enabled Rear Seat Entertainment | Compact High-Fidelity Audio Module |
Use Scenario: Dual-zone rear-seat entertainment system with independent volume and fault reporting per zone. IC Role / Device Role / Timing Role: Front/rear channel pair amplifier with independent mute/play and per-channel clipping detection. Use Value: Enables software-based speaker protection and user feedback (e.g., LED warning on detected short circuit). | Use Scenario: Space-constrained premium audio module for aftermarket amplifiers or docking stations. IC Role / Device Role / Timing Role: Digital-input quad amplifier with integrated 24-bit DAC and flexible serial interface mapping. Use Value: Supports high-res audio playback (192 kHz) without external clock routing complexity or jitter-sensitive PLL design. |
Availability
TDA7802SMTR is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop compatible head units, and diagnostic-enabled audio modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TDA7802SMTR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The TDA7802 belongs to ST's automotive-grade audio power amplifier product line, engineered specifically for digital-input, high-efficiency, diagnostics-rich amplification in next-generation vehicle infotainment platforms.
FAQ
What is the difference between TDA7802SMTR and TDA7802PDTR?
TDA7802SMTR uses the Flexiwatt27 SMD package (27 pins), while TDA7802PDTR uses the PowerSO36 package (36 pins). The PowerSO36 variant adds hardware load selection pins (LOAD1A/LOAD1B), second I²C address pin (ADD2), and UNMUTEhw input - enabling more granular hardware control without I²C. Flexiwatt27 lacks these pins but retains full I²S/TDM and diagnostic functionality.
Does TDA7802SMTR support TDM-16Ch mode?
Yes, TDA7802SMTR supports TDM-16Ch serial interface mode as specified in the datasheet. In this configuration, it receives 16 time slots per frame across SD13 and SD24 lines, allowing up to eight stereo channels - useful for multi-zone or surround-sound architectures where the host SoC aggregates multiple audio streams.
Can TDA7802SMTR drive 1 Ω loads?
No - 1 Ω driving capability is explicitly limited to the PowerSO36 package variant (TDA7802PD/PDTR) per ST's datasheet. The Flexiwatt27 package (TDA7802SMTR) is rated for minimum 2 Ω loads, with max output power of 4 × 72 W into 2 Ω. Attempting 1 Ω operation risks thermal shutdown or device damage.
How is the CDdiag pin used for fault reporting?
The CDdiag pin is an open-drain output that asserts low during specific fault conditions: overcurrent (speaker short), thermal warning, power-on reset, DC offset, or short-to-VCC/GND. Its state is decoded via pulse-width or duration - e.g., brief pulses indicate clipping, longer pulses indicate thermal events - and can be read directly by a microcontroller GPIO with pull-up.
TDA7802SMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- -
- Grade:
- Automotive
TDA7802SMTR FAQ
1.How can I place an order for TDA7802SMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7802SMTR 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 TDA7802SMTR reliable?
The price and inventory of TDA7802SMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7802SMTR is usually 5 days.
3.What payment methods are accepted for TDA7802SMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7802SMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7802SMTR?
TDA7802SMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7802SMTR 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 TDA7802SMTR?
For technical support, including TDA7802SMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7802SMTR requirements.
6.How does Aetrix verify that TDA7802SMTR is sourced from the original manufacturer or authorized distributors?
All TDA7802SMTR 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 TDA7802SMTR meets industry standards.
7.What is the process for return or replacement of TDA7802SMTR?
All TDA7802SMTR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7802SMTR, 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 TDA7802SMTR part is unused and in its original packaging.
Return procedure for TDA7802SMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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