TDA7901-ZSX STMicroelectronics Integrated Circuit (Other) In Stock
STMicroelectronics TDA7901-ZSX is an automotive quad power amplifier with Class-G efficiency, digital audio input, and built-in diagnostics, delivering 4-channel amplification compatible with start-stop vehicle systems and meeting AEC-Q100 automotive grade requirements.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 36
- Lifecycle
- ACTIVE
- Datasheet
- TDA7901-ZSX Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.8253(MOQ 310)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Class-G amplifier topology dynamically adjusting supply rail voltage to improve efficiency by up to 30% versus Class-AB at typical automotive listening levels
- 4-channel digital audio input supporting I2S interface for direct connection to automotive head units without an external DAC stage
- Built-in diagnostics covering short-to-ground, short-to-battery, open-load, and thermal fault detection with diagnostic output pins for system health monitoring
- Start-stop compatibility maintaining audio rail stability during 6 V to 18 V supply transients typical of engine restart events in modern vehicles
Applications
TDA7901-ZSX is designed for automotive multimedia head units, door speaker amplifier modules, and rear-seat entertainment systems where high audio output efficiency is critical for reducing thermal load and battery drain in start-stop vehicles. Its Class-G topology provides audible power levels with significantly lower quiescent dissipation compared to conventional Class-AB quad amplifiers operating from a 14.4 V automotive rail. The integrated I2S digital input and fault diagnostics simplify system integration with modern automotive SoC platforms compliant with ISO 26262 functional safety frameworks.
Specifications
| YTEOL | 5 |
| Consumer IC Type | CLASS AB AUDIO AMPLIFIER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TDA7901-ZSX:
Frequently Asked Questions
How does the Class-G topology in TDA7901-ZSX reduce power dissipation compared with a conventional Class-AB quad amplifier in a car audio system?
Class-G dynamically selects between 2 or more supply voltage levels, using a lower rail (for example 7 V) for quiet passages and switching to the full 14.4 V rail only when peaks demand it. At typical in-car listening levels of 1 W to 4 W per channel, this reduces average supply power by up to 30 % compared with a Class-AB stage operating permanently from the full 14.4 V bus, lowering heatsink size and thermal stress on the head-unit enclosure.
What diagnostic faults can TDA7901-ZSX detect, and how does this help an automotive system-safety engineer?
TDA7901-ZSX integrates detection for short-to-ground, short-to-supply, open-load, and over-temperature faults across all 4 output channels, reporting status via dedicated diagnostic pins. This allows an ECU to log fault codes, mute affected channels, and trigger a limp-home audio mode without requiring external current sensing resistors or comparator circuits, supporting ISO 26262 system-level fault reaction requirements.
Can TDA7901-ZSX maintain stable audio output during an engine start-stop event when the battery voltage dips below 9 V?
Yes, TDA7901-ZSX is specified as start-stop compatible, meaning it handles supply voltage transients down to approximately 6 V during cold-crank events and up to 18 V during load-dump conditions without shutting down or producing audible glitches. The built-in supply monitoring holds the amplifier in a protected state during extreme dips and resumes normal operation within milliseconds once the voltage returns above the minimum threshold.
For a rear-seat entertainment module, what interface does TDA7901-ZSX use to receive audio from the head-unit SoC, and does this eliminate an external DAC?
TDA7901-ZSX accepts a digital I2S audio input stream at standard rates including 44.1 kHz and 48 kHz with up to 24-bit word length, connecting directly to the I2S output of a typical automotive application processor or infotainment SoC. This eliminates the external stereo DAC IC and reconstruction filter components that a conventional analog-input Class-AB amplifier would require, saving approximately 3 to 5 passive and active components per audio channel.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 310+ | $7.3900 | $2290.90 |
| 1240+ | $7.0437 | $8734.14 |
| 2480+ | $6.9345 | $17197.44 |
| 4960+ | $6.8252 | $33853.24 |
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