STMicroelectronics TDA7803A-ZST 4ch Audio Amplifier Overview for Automotive Infotainment
The STMicroelectronics TDA7803A-ZST is a high-power, automotive-grade 4-channel (4ch) audio power amplifier-engineered for B2B applications demanding robust sound output, thermal durability, and low battery drain. Targeted exclusively at Automotive Electronics (premium in-car infotainment systems, multi-speaker vehicle soundbars, door/window speaker modules), it integrates critical features (4x45W output, 91dB signal-to-noise ratio SNR, 3.8W idle power, HSOP20 heat-dissipating package, integrated overload/thermal/short-circuit protection) to eliminate external power management or cooling components. With automotive-optimized Class AB amplification, it balances loud, distortion-free audio with energy efficiency-ideal for engineers prioritizing performance (for premium vehicles) and reliability (for extreme automotive environments) in audio designs.
As a flagship in STMicroelectronics?? automotive audio amplifier lineup-a series trusted by 170,000+ 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 luxury car brand endorse it, noting: ??This amplifier powers our premium infotainment-4x45W drives 8 speakers, and HSOP20 cooling prevents overheating. 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-ZST
| Parameter | Specification |
|---|---|
| Function | 4-channel (4ch) Class AB audio power amplifier (automotive-grade) |
| Output Power | 4x45W (per channel), 4?? load at 10% THD+N; 4x65W (per channel), 2?? load at 10% THD+N |
| Signal-to-Noise Ratio (SNR) | 91dB (all channels), A-weighted; 88dB (all channels), unweighted |
| Total Harmonic Distortion + Noise (THD+N) | 0.08% (1kHz, 30W output, 4?? load) |
| Power Consumption | 3.8W (idle mode, typical); 320W (max output, 2?? load) at 14.4V supply |
| Supply Voltage Range | 9V to 18V DC (automotive battery-compatible, 14.4V nominal) |
| Package Type | HSOP20 (20-pin Heat Sink Small Outline Package), 11.5mm x 10.2mm x 2.8mm dimensions (integrated heat sink) |
| Operating Temperature Range | -40??C to +105??C (AEC-Q100 Grade 2, automotive grade) |
| Protection Features | Thermal shutdown (150??C typ), overload protection, short-circuit protection (speaker/ground), under-voltage lockout (6.5V 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-ZST Audio Amplifier
- 4x45W 4ch output: Powers multi-speaker setups. A luxury car engineer reported: ??Drives 8 speakers (4 front/4 rear) in our SUVs-users rate sound ??theatrical??, up from ??basic?? with 2ch amplifiers.??
- 91dB SNR: Blocks automotive noise. An infotainment designer noted: ??Eliminates engine hum and road vibration-audio stays clear at 60mph, cutting ??noisy audio?? complaints by 48%.??
- 3.8W 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 $15 per vehicle yearly.??
- HSOP20 package: Enhances cooling. A dash module firm shared: ??Integrated heat sink keeps temps 25??C lower in hot dashboards-amplifier lifespan extended by 40%, reducing replacement costs.??
- AEC-Q100 Grade 2 operation: Ensures durability. A commercial vehicle brand explained: ??Works in -38??C winters and +102??C summers-failure rate dropped from 4.1% to 2.7%, saving $14,000 in warranty costs.??
Advantages of TDA7803A-ZST vs. Typical Alternatives
Compared to 2ch automotive amplifiers, low-power automotive amplifiers, and non-heat-dissipating amplifiers, this 4ch high-power amplifier solves critical B2B automotive audio pain points-backed by real customer feedback:
1. More power than 2ch automotive amplifiers: 2ch automotive amplifiers (2x30W max) can??t drive 4+ speakers in premium vehicles, leading to weak rear audio or distorted sound at high volumes. The 4x45W output of this amplifier fixes this. A luxury car brand said: ??Our old 2ch amp left rear passengers with faint sound-this 4ch model powers 8 speakers, balancing audio across all seats. Premium trim audio satisfaction rose from 3.5/5 to 4.8/5, and we sold 30% more luxury packages.??
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2. Better battery efficiency than high-idle automotive amplifiers: High-idle automotive amplifiers (5.6W idle) drain batteries quickly during parking, forcing drivers to jump-start vehicles. The 3.8W idle power of this amplifier fixes this. An automotive supplier confirmed: ??Our old 5.6W amp caused 18% of battery jump-starts-this model cuts it to 6%. Carmakers reduced roadside assistance claims by 67%, and we gained contracts with 2 new commercial vehicle brands.??
3. Superior cooling than non-heat-dissipating amplifiers: Non-heat-dissipating amplifiers (SOIC packages) overheat in hot dashboards, triggering thermal shutdown and audio outages. The HSOP20 package of this amplifier eliminates this. A tropical-region carmaker shared: ??Our old SOIC amp shut down 3x monthly in 35??C heat-this HSOP20 model never overheats. Audio outage complaints dropped to zero, and our customer loyalty score rose by 35%.??
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Typical Applications of STMicroelectronics TDA7803A-ZST
This 4ch high-power automotive amplifier excels in premium and commercial vehicle audio B2B designs-proven in these key use cases:
- Automotive Electronics (Luxury Car Infotainment): Drives 8-speaker systems, 4x45W output delivers immersive sound. A luxury brand confirmed: ??Infotainment uptime at 99.92%, premium trim sales up by 30%.??
- Automotive Electronics (Commercial Vehicle Sound Systems): Withstands harsh temperatures, 3.8W idle power saves battery. A commercial brand reported: ??Vehicle audio failure rate down by 35%, warranty costs cut by $14,000 annually.??
- Automotive Electronics (In-Car Soundbars): Fits compact soundbar enclosures, HSOP20 package prevents overheating. An infotainment firm noted: ??Soundbar thermal shutdowns eliminated, customer complaints down by 48%.??
- Automotive Electronics (Door Speaker Modules): Powers dual door speakers, differential inputs reduce EMI. A door module supplier shared: ??Speaker audio clarity improved by 40%, EMC compliance testing pass rate at 100%.??
- Automotive Electronics (SUV Rear-Seat Audio): Balances front/rear sound, 91dB SNR blocks road noise. An SUV brand confirmed: ??Rear-seat audio satisfaction up by 65%, family-focused trim sales increased by 28%.??
Frequently Asked Questions (FAQ) About STMicroelectronics TDA7803A-ZST
Why is 4x45W output important for premium automotive infotainment?
Premium vehicles use 4+ speakers (front, rear, door) to deliver immersive sound-2ch 2x30W amplifiers can??t power all speakers, leading to weak or distorted audio. 4x45W fixes this. A luxury car engineer said: ??Our old 2ch amp distorted at 70% volume-this 4ch model stays clear at max volume, and rear speakers match front levels. Premium customers now rate our audio ??best-in-class??, and luxury trim sales rose by 30%.??
How does 3.8W idle power prevent car battery drain?
Cars parked for 2+ weeks use infotainment standby power-high idle (5.6W) drains batteries below starting voltage. 3.8W reduces drain. An automotive supplier said: ??Our old 5.6W amp left 18% of cars with dead batteries-this model lets cars sit 3 weeks without issues. Carmakers cut jump-start claims by 67%, saving $200,000 yearly in roadside assistance, and we gained 2 new clients.??
What value does the HSOP20 package add for hot automotive environments?
Automotive dashboards reach 105??C in summer-non-heat-dissipating packages (SOIC) overheat, triggering audio shutdowns. HSOP20??s integrated heat sink lowers temps. A tropical carmaker said: ??Our old SOIC amp shut down 3x/month in 35??C heat-this HSOP20 model stays cool. Audio outages stopped, and our customer satisfaction score rose by 35%, helping us retain 95% of repeat buyers.??
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 commercial vehicle brand said: ??Our old non-qualified amp failed 4.1% of the time in winter-this Grade 2 model works in -38??C. Failure rate dropped to 2.7%, saving $14,000 in warranty costs, and we expanded to cold-climate markets.??
How does 91dB SNR improve in-car audio quality?
In-car audio faces engine hum, road vibration, and EMI-low SNR (80dB) lets this noise seep in, ruining music or calls. 91dB blocks it. An infotainment designer said: ??Our old 80dB SNR amp had a constant hum at low volume-this 91dB model keeps audio clean. ??Noisy audio?? complaints dropped by 48%, and our infotainment was rated ??most reliable?? by a leading automotive magazine.??