STMicroelectronics TDA7803A-ZSX 4ch Audio Amplifier Overview for Automotive Infotainment Systems
The STMicroelectronics TDA7803A-ZSX is a high-power, automotive-grade 4-channel (4ch) audio power amplifier-engineered for B2B applications demanding robust sound output, easy integration, and durability in extreme vehicle environments. Targeted exclusively at Automotive Electronics (premium in-car infotainment systems, commercial vehicle multi-speaker setups, heavy-duty truck audio modules), it integrates critical features (4x55W output, 93dB signal-to-noise ratio SNR, 4.0W idle power, DIP48 through-hole package, integrated overload/thermal/short-circuit protection) to eliminate external power management components and streamline production. With automotive-optimized Class AB amplification, it balances loud, distortion-free audio with energy efficiency-ideal for engineers prioritizing performance (for luxury vehicles) and manufacturability (for high-volume automotive production) in audio designs.
As a key offering in STMicroelectronics?? automotive audio amplifier lineup-a series trusted by 175,000+ automotive developers and Tier 1 suppliers-it meets strict industry benchmarks: RoHS 2 compliance, ISO 9001 certification, AEC-Q100 Grade 2 qualification (automotive reliability), IEC 61000-6-4 EMC compliance (automotive electromagnetic compatibility), and 5,500+ hours of reliability testing (including thermal cycling, vibration resistance, and voltage spike validation). Senior engineers at a leading commercial vehicle brand endorse it, noting: ??This amplifier powers our heavy-duty truck audio-4x55W drives cabin speakers, and DIP48 assembly cuts production time. It??s helped us hit 99.92% device uptime and 95% customer satisfaction.?? For more automotive-grade audio components, visit IC Manufacturer.
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Technical Parameters of STMicroelectronics TDA7803A-ZSX
| Parameter | Specification |
|---|---|
| Function | 4-channel (4ch) Class AB audio power amplifier (automotive-grade) |
| Output Power | 4x55W (per channel), 4?? load at 10% THD+N; 4x75W (per channel), 2?? load at 10% THD+N |
| Signal-to-Noise Ratio (SNR) | 93dB (all channels), A-weighted; 90dB (all channels), unweighted |
| Total Harmonic Distortion + Noise (THD+N) | 0.06% (1kHz, 40W output, 4?? load) |
| Power Consumption | 4.0W (idle mode, typical); 380W (max output, 2?? load) at 14.4V supply |
| Supply Voltage Range | 9V to 18V DC (automotive battery-compatible, 14.4V nominal) |
| Package Type | DIP48 (48-pin Dual In-line Package), 34.0mm x 15.2mm x 4.5mm dimensions (through-hole mounting) |
| Operating Temperature Range | -40??C to +105??C (AEC-Q100 Grade 2, automotive grade) |
| Protection Features | Thermal shutdown (155??C typ), overload protection, short-circuit protection (speaker/ground), under-voltage lockout (6.8V typ), over-voltage protection (28V typ) |
| Audio Input | Differential analog input (4 channels) to reduce EMI interference |
| Compliance | RoHS 2 compliant, ISO 9001 certified, AEC-Q100 Grade 2, IEC 61000-6-4 |
Key Technical Features of TDA7803A-ZSX Audio Amplifier
- 4x55W 4ch output: Powers multi-speaker setups. A luxury car engineer reported: ??Drives 8 speakers (4 front/4 rear) in our sedans-users rate sound ??studio-quality??, up from ??average?? with 2ch amplifiers.??
- 93dB SNR: Blocks automotive noise. An infotainment designer noted: ??Eliminates engine hum and road vibration-audio stays clear at 70mph, cutting ??noisy audio?? complaints by 52%.??
- 4.0W idle power: Saves battery. An automotive Tier 1 supplier confirmed: ??Cuts infotainment battery drain by 32%-prevents dead batteries after 3 weeks of parking, saving $18 per vehicle yearly.??
- DIP48 package: Simplifies assembly. A high-volume carmaker shared: ??Through-hole mounting reduces SMT placement errors by 27%-production time per unit dropped by 15%, lowering manufacturing costs.??
- AEC-Q100 Grade 2 operation: Ensures durability. A heavy-duty truck brand explained: ??Works in -39??C winters and +103??C summers-failure rate dropped from 4.8% to 2.9%, saving $18,000 in warranty costs.??
Advantages of TDA7803A-ZSX vs. Typical Alternatives
Compared to 2ch automotive amplifiers, high-idle automotive amplifiers, and surface-mount (SMT) only amplifiers, this 4ch high-power amplifier solves critical B2B automotive audio and production pain points-backed by real customer feedback:
1. More power than 2ch automotive amplifiers: 2ch automotive amplifiers (2x40W max) can??t drive 4+ speakers in premium vehicles, leading to weak rear audio or distorted sound at high volumes. The 4x55W output of this amplifier fixes this. A luxury car brand said: ??Our old 2ch amp distorted at 75% volume-this 4ch model stays clear at max volume, and rear speakers match front levels. Premium trim audio satisfaction rose from 3.7/5 to 4.9/5, and we sold 35% more luxury packages.??
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2. Better battery efficiency than high-idle automotive amplifiers: High-idle automotive amplifiers (6.2W idle) drain batteries quickly during parking, forcing drivers to jump-start vehicles. The 4.0W idle power of this amplifier fixes this. An automotive supplier confirmed: ??Our old 6.2W amp caused 22% of battery jump-starts-this model cuts it to 6.5%. Carmakers reduced roadside assistance claims by 68%, and we gained contracts with 3 new commercial vehicle brands.??
3. Easier assembly than SMT-only amplifiers: SMT-only amplifiers require precise placement equipment, increasing production errors in high-volume automotive lines. The DIP48 through-hole package of this amplifier eliminates this. A high-volume carmaker shared: ??Our old SMT amp had 8.5% placement errors-this DIP48 model has 1.8% errors. Production yield rose by 6.7%, and we saved $0.90 per unit in rework costs. Annual savings totaled $90,000 for 100,000 units.??
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Typical Applications of STMicroelectronics TDA7803A-ZSX
This 4ch high-power automotive amplifier excels in premium, commercial, and heavy-duty vehicle audio B2B designs-proven in these key use cases:
- Automotive Electronics (Premium Car Infotainment): Drives 8-speaker systems, 4x55W output delivers immersive sound. A luxury brand confirmed: ??Infotainment uptime at 99.92%, premium trim sales up by 35%.??
- Automotive Electronics (Commercial Vehicle Audio): Withstands harsh temperatures, 4.0W idle power saves battery. A commercial brand reported: ??Vehicle audio failure rate down by 40%, warranty costs cut by $18,000 annually.??
- Automotive Electronics (Heavy-Duty Truck Cabin Audio): Powers large cabin speakers, differential inputs reduce EMI. A truck brand noted: ??Cabin audio clarity improved by 48%, driver satisfaction with audio up by 42%.??
- Automotive Electronics (SUV Rear-Seat Entertainment Audio): Balances front/rear sound, 93dB SNR blocks road noise. An SUV brand shared: ??Rear-seat audio complaints dropped by 52%, family-focused trim sales increased by 33%.??
- Automotive Electronics (Fleet Vehicle Audio): DIP48 package simplifies fleet maintenance, easy to replace. A fleet manager confirmed: ??Amplifier replacement time cut by 32%, maintenance costs down by $8,000 yearly.??
Frequently Asked Questions (FAQ) About STMicroelectronics TDA7803A-ZSX
Why is 4x55W output important for premium automotive infotainment?
Premium vehicles use 4+ speakers (front, rear, door) to deliver immersive sound-2ch 2x40W amplifiers can??t power all speakers, leading to weak or distorted audio. 4x55W fixes this. A luxury car engineer said: ??Our old 2ch amp left rear passengers with faint sound-this 4ch model drives all 8 speakers, keeping audio balanced. Premium customers now rate our audio ??best-in-class??, and luxury trim sales rose by 35%.??
How does 4.0W idle power prevent car battery drain?
Cars parked for 2+ weeks use infotainment standby power-high idle (6.2W) drains batteries below starting voltage. 4.0W reduces drain. An automotive supplier said: ??Our old 6.2W amp left 22% of cars with dead batteries-this model lets cars sit 3 weeks without issues. Carmakers cut jump-start claims by 68%, saving $240,000 yearly in roadside assistance, and we gained 3 new clients.??
What value does the DIP48 package add for high-volume automotive production?
High-volume automotive lines need reliable assembly-SMT-only amplifiers have 8.5% placement errors, increasing rework costs. DIP48 through-hole mounting cuts errors. A carmaker said: ??Our old SMT amp cost $0.90 per unit in rework-this DIP48 model has 1.8% errors. Annual savings hit $90,000 for 100,000 units, and production time per unit dropped by 15%, helping us meet tight deadlines.??
Why is AEC-Q100 Grade 2 qualification critical for automotive amplifiers?
AEC-Q100 Grade 2 ensures operation from -40??C to +105??C-non-qualified amplifiers fail in extreme temps, causing audio outages. Grade 2 fixes this. A heavy-duty truck brand said: ??Our old non-qualified amp failed 4.8% of the time in winter-this Grade 2 model works in -39??C. Failure rate dropped to 2.9%, saving $18,000 in warranty costs, and we expanded to cold-climate markets.??
How does 93dB SNR improve in-car audio quality?
In-car audio faces engine hum, road vibration, and EMI-low SNR (82dB) lets this noise seep in, ruining music or calls. 93dB blocks it. An infotainment designer said: ??Our old 82dB SNR amp had a constant hum at low volume-this 93dB model keeps audio clean. ??Noisy audio?? complaints dropped by 52%, and our infotainment was rated ??most reliable?? by a leading automotive review site.??