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STMicroelectronics TDA7801PDTR
- Part No.:
- TDA7801PDTR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- PowerSO-36 Exposed Top Pad
- Datasheet:
-
TDA7801PDTR.pdf
- Description:
- IC AMP D QUAD 72W POWERSO-36
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
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Product details
Overview
TDA7801PDTR from STMicroelectronics is a BCD6-technology quad bridge Class-D audio power amplifier with integrated 110 dB D/A conversion, I²S digital input (3.3/1.8 V), and full I²C diagnostics. It delivers 4×28 W into 4 Ω @ 14.4 V (1 kHz, 10% THD) and supports selectable sampling rates up to 192 kHz for automotive infotainment systems.
For engineers reviewing the TDA7801PDTR datasheet, TDA7801PDTR pinout, TDA7801PDTR application, or TDA7801PDTR equivalent, key selection considerations include its PowerSO36 (slug-up) package, dual I²C addresses, 8-channel TDM mode, independent short-circuit protection per channel, and linear thermal warning outputs.
Technical Context
The TDA7801PDTR integrates a high-performance sigma-delta D/A converter with MOSFET output stages in a single BCD6 die, enabling 115 dB SNR and >105 dB dynamic range. Its architecture supports both I²C-controlled operation (with register-mapped diagnostics) and legacy mute/enabled mode.
It implements four independent bridge outputs with dedicated power grounds, on-chip PLL-based clock generation for I²S synchronization, and real-time fault detection including DC offset, clipping, open-load, short-to-rail, and thermal warnings-all reported via open-drain CD/DIAG pin or I²C registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4×28 W @ 4 Ω, 14.4 V, 1 kHz, 10% THD - sufficient for mid-power OEM car audio front/rear speaker drive |
| Max Output Power | 4×72 W @ 2 Ω - enables high-SPL applications with low-impedance speaker loads |
| D/A Resolution | Integrated 110 dB D/A conversion - eliminates external DAC, reduces BOM count and layout complexity |
| I²S Input | 3.3/1.8 V logic, TDM support up to 8 channels - compatible with modern SoC audio interfaces and scalable multi-zone systems |
| Sampling Rates | 44.1 / 48 / 96 / 192 kHz - supports CD, DVD-Audio, and high-res streaming formats without external resampling |
| Diagnostic Coverage | I²C-accessible DC/AC load detection, clipping level select, offset detection, and 4-channel thermal warnings - enables predictive maintenance and speaker health monitoring |
| Fault Protection | Four independent short-circuit protections + linear thermal muting - prevents latch-up and thermal runaway during abnormal conditions |
Pinout & Package
Package: PowerSO36 (slug-up), thermally enhanced exposed tab (GND-connected), RoHS-compliant, vertical mounting orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB | Thermal pad / GND | Primary heat dissipation path; must be soldered to PCB copper pour for thermal compliance |
| CD/DIAG | Open-drain diagnostic output | Asserts low on overcurrent, thermal warning, POR, or offset fault; supports wired-OR fault bus |
| OUT4− / OUT4+ | Bridge output pair (Ch4) | Drives right-rear speaker differentially; requires external LC filter for EMI compliance |
| VCC (Ch3–4) | Positive supply rail | Shared 12–18 V supply for channels 3 and 4; decoupling required per datasheet layout guidelines |
| PW_GND (Ch4) | Power ground return | Low-impedance return path for channel 4 output stage; separate from analog/digital grounds |
| I²C Data / I²C Clock | Bi-directional I²C interface | Configures gain, mute, diagnostics, and operating mode; 3.3/5 V tolerant |
| I²C Address | Hardware address select | Two fixed addresses supported (00000 / 00001) - enables dual-device I²C bus sharing |
| PLL-filter / ENABLE | Loop filter input / enable control | Accepts RC network for PLL stability; CMOS-compatible active-high enable |
| WS / SCK / SD1_3 / SD2_4 | I²S bus signals | Supports left-justified, I²S, and TDM formats; SD1_3 carries Ch1/Ch3, SD2_4 carries Ch2/Ch4 |
Key Features
| Feature | Design Value |
|---|---|
| On-chip D/A conversion | 110 dB SNR performance eliminates need for external DAC and associated layout sensitivity |
| Per-channel fault isolation | Four independent short-circuit protections allow continued operation of unaffected channels during fault |
| Programmable gain | Four discrete gain levels (0/6/12/18 dB) enable optimized signal-to-noise ratio across source types |
| DC offset detection | Monitors output DC bias in play/mute modes to prevent speaker damage from sustained offset |
| Clipping detector | Selectably triggered at 10/20/30% THD thresholds - provides early warning before audible distortion onset |
Applications
| Automotive Infotainment Head Unit | Multi-Zone Rear-Seat Entertainment |
|---|---|
Use Scenario: Integrated amplifier in OEM head unit driving front/rear speakers with digital audio source. IC Role / Device Role / Timing Role: Quad bridge power amplifier with embedded D/A and diagnostics; replaces discrete DAC + analog amp chain. Use Value: Reduces component count by 5+ parts, improves SNR by ≥15 dB vs. analog-input alternatives, and enables real-time speaker health reporting via I²C. | Use Scenario: Audio distribution module powering seatback displays and headphones in premium vehicles. IC Role / Device Role / Timing Role: TDM-capable digital input amplifier supporting 8-channel audio routing across zones. Use Value: Eliminates external multiplexers and level shifters; allows synchronized playback across zones using single I²S bus. |
| Aftermarket DSP Integration Module | High-Fidelity Car Audio Tuning Platform |
Use Scenario: Compact add-on board between DSP processor and speaker outputs in custom audio builds. IC Role / Device Role / Timing Role: Digital-input power stage with programmable gain and clipping feedback for adaptive tuning. Use Value: Enables real-time gain adjustment and fault logging via I²C, supporting auto-EQ calibration and thermal derating profiles. | Use Scenario: Reference design for audiophile-grade amplification with diagnostics-driven reliability. IC Role / Device Role / Timing Role: High-dynamic-range Class-D amplifier with 115 dB SNR and linear thermal warning outputs. Use Value: Delivers studio-monitor fidelity while providing actionable thermal data to prevent degradation under sustained high-power operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad digital-input audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7802TR | Same PowerSO36 package, higher 4×45 W output (4 Ω), adds spread-spectrum modulation for lower EMI | Targets premium audio systems requiring higher power density and stricter EMC compliance | Choose when >28 W/channel is needed and board-level EMI filtering must be minimized |
| MAX9744AEE+T | 32-pin QFN, 2×50 W stereo output only, no TDM or multi-address I²C, lacks DC offset detection | Suitable for dual-channel designs without rear speaker diagnostics or multi-zone expansion | Prefer when footprint is constrained and quad-channel diagnostics are not required |
Compared with TDA7801PDTR, TDA7802TR offers higher output power and improved EMI behavior but shares identical diagnostics architecture; MAX9744AEE+T reduces channel count and diagnostic depth to achieve smaller size and lower cost in stereo-focused applications.
Availability
TDA7801PDTR is available at Aetrix Electronics and suitable for automotive infotainment head units, multi-zone entertainment modules, and aftermarket DSP integration platforms requiring stable component supply, long-lifecycle support, and automotive-grade reliability.
Supply support for TDA7801PDTR 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, specializing in automotive, industrial, and power management ICs with broad manufacturing and quality certifications including AEC-Q100.
The TDA7801 belongs to ST's automotive audio power amplifier product line, engineered specifically for digital-input car radios and infotainment systems requiring high-fidelity output, comprehensive diagnostics, and robust fault handling in harsh electrical environments.
FAQ
What is the function of the CD/DIAG pin?
The CD/DIAG pin is an open-drain output that asserts low during overcurrent events, thermal warnings, power-on reset, or DC offset faults. It supports wired-OR connection for centralized fault monitoring and can be read directly or via I²C register polling for granular channel-specific status.
Does TDA7801PDTR support I²S TDM mode, and what is required to enable it?
Yes - TDA7801PDTR supports 8-channel TDM mode exclusively in the PowerSO36 package. Enablement requires configuring the I²C register IB0 (address 0x00) bit D0=1 and connecting SD1_3 and SD2_4 to time-multiplexed data streams carrying interleaved channel samples per TDM slot definition.
How does the thermal protection behave under sustained high-power operation?
It implements linear thermal muting: output gain reduces progressively as junction temperature rises above 135 °C, avoiding abrupt shutdown. Four independent thermal warnings (one per channel) are reported via I²C registers DB0–DB3, allowing software to throttle specific channels before global muting occurs.
Can TDA7801PDTR operate without I²C control, and what features remain functional?
Yes - in legacy mode, it operates with hardware-configured gain and mute via pins I²C Data (as mute) and I²C Clock (as enable). Diagnostics remain active on CD/DIAG, but I²C-accessible features like TDM, register-based gain control, and per-channel fault reporting are disabled.
TDA7801PDTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- PowerSO-36 Exposed Top Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Audio Amplifier
- Applications:
- Audio
- Number of Channels:
- 4
- Interface:
- I2C, I2S, TDM
- Voltage - Supply:
- 8V ~ 18V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Specifications:
- 115dB
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
TDA7801PDTR FAQ
1.How can I place an order for TDA7801PDTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7801PDTR 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 TDA7801PDTR reliable?
The price and inventory of TDA7801PDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7801PDTR is usually 5 days.
3.What payment methods are accepted for TDA7801PDTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7801PDTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7801PDTR?
TDA7801PDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7801PDTR 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 TDA7801PDTR?
For technical support, including TDA7801PDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7801PDTR requirements.
6.How does Aetrix verify that TDA7801PDTR is sourced from the original manufacturer or authorized distributors?
All TDA7801PDTR 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 TDA7801PDTR meets industry standards.
7.What is the process for return or replacement of TDA7801PDTR?
All TDA7801PDTR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7801PDTR, 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 TDA7801PDTR part is unused and in its original packaging.
Return procedure for TDA7801PDTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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