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
What are the key features of TDA7901-ZSX?
- 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
What is TDA7901-ZSX used for?
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.
What are the specifications of TDA7901-ZSX?
| 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 |
Where can I find the TDA7901-ZSX datasheet?
TDA7901-ZSX Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TDA7901-ZSX?
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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Why Buy from FindMyChip
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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