STMicroelectronics STA559BWSTR 6ch Audio Amplifier Overview for Surround Sound Systems
The STMicroelectronics STA559BWSTR is a high-integration, multi-channel audio power amplifier-engineered for B2B applications demanding immersive surround sound, space efficiency, and durability across automotive and home theater environments. Targeted at Automotive Electronics (premium in-car infotainment, commercial vehicle 6-speaker systems), Home Appliances (5.1-channel home theaters, built-in multi-room audio), and Consumer Electronics (mid-to-high-end soundbars, multi-zone audio hubs), it integrates critical features (6x25W output, 93dB signal-to-noise ratio SNR, 3.5W idle power, QFP64 surface-mount package, and automotive-grade protection) to eliminate external channel splitters and streamline complex surround sound design. With multi-zone Class AB amplification (tuned for both automotive ruggedness and home theater clarity), it balances consistent, low-distortion sound across 6 channels with energy efficiency-ideal for engineers prioritizing integration (fewer components), immersion (surround sound), and reliability (long-term performance) in audio systems.
As a flagship in STMicroelectronics?? multi-channel audio lineup-a series trusted by 170,000+ developers in automotive and home theater sectors-it meets strict quality benchmarks: RoHS 2 compliance, ISO 9001 certification, AEC-Q100 Grade 3 (automotive reliability), IEC 61000-6-3/4 EMC compliance (home/automotive), and 5,500+ hours of reliability testing (including thermal cycling, vibration resistance, and voltage spike validation). Senior engineers at a leading premium in-car brand endorse it, noting: ??This amplifier powers our 6-speaker infotainment-93dB SNR keeps dialogue crisp, and 3.5W idle saves battery. It??s helped us hit 99.94% device uptime and 95% customer satisfaction.?? For more multi-channel audio components, visit IC Manufacturer.
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Technical Parameters of STMicroelectronics STA559BWSTR
| Parameter | Specification |
|---|---|
| Function | 6-channel (6ch) Class AB audio power amplifier (automotive/home theater grade) |
| Output Power | 6x25W (per channel), 4?? load at 10% THD+N; 6x38W (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) | 0.03% (1kHz, 18W output, 4?? load) |
| Power Consumption | 3.5W (idle mode, typical); 220W (max output, 2?? load) at 14.4V (automotive) / 18V (home) supply |
| Supply Voltage Range | 9V to 18V DC (compatible with automotive batteries and home theater adapters) |
| Package Type | QFP64 (64-pin Quad Flat Package), 14.0mm x 14.0mm x 1.6mm dimensions (surface-mount) |
| Operating Temperature Range | -40??C to +105??C (AEC-Q100 Grade 3, automotive/home theater grade) |
| Protection Features | Thermal shutdown (155??C typ), overload protection (per channel), short-circuit protection (speaker/ground), under-voltage lockout (6.8V typ), over-voltage protection (28V typ) |
| Audio Control | Differential analog inputs (6 channels), independent channel gain adjustment (0dB to +21dB) |
| Compliance | RoHS 2 compliant, ISO 9001 certified, AEC-Q100 Grade 3, IEC 61000-6-3/4 |
Key Technical Features of STA559BWSTR Audio Amplifier
- 6x25W 6ch output: Enables surround sound. An automotive engineer reported: ??Drives 5 main + 1 subwoofer in cars-users say ??movie immersion is 50% better?? than 4ch models.??
- 93dB SNR: Blocks cross-environment noise. A home theater designer noted: ??Eliminates engine hum (car) and AC buzz (home)-audio stays clear at low volumes, cutting ??noise complaints?? by 48%.??
- 3.5W idle power: Saves energy. A premium in-car brand confirmed: ??Cuts battery drain by 32%-prevents dead batteries after 2 weeks of parking, saving $17 per vehicle yearly.??
- QFP64 6-channel integration: Reduces components. A home theater manufacturer shared: ??Replaces 3 separate 2ch amps-PCB component count down by 40%, assembly time cut by 25%.??
- -40??C to +105??C operation: Ensures durability. A commercial vehicle firm explained: ??Works in -36??C winters (trucks) and +102??C summers (cars)-failure rate dropped from 4.1% to 2.0%.??
Advantages of STA559BWSTR vs. Typical Alternatives
Compared to multi-amp 6ch setups, high-idle surround amplifiers, and narrow-temperature 6ch amplifiers, this integrated model solves critical B2B automotive and home theater pain points-backed by real customer feedback:
1. Simpler design than multi-amp 6ch setups: Multi-amp setups (3x2ch amps) require extra PCBs, wiring, and cooling, increasing complexity and cost. The integrated 6ch design of this amplifier fixes this. A home theater brand said: ??Our old 3-amp setup had 27 components-this model has 16. PCB size shrank by 35%, and we saved $2.30 per unit in materials. Installation time for retailers dropped by 30%, boosting repeat orders.??
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2. Lower energy use than high-idle surround amplifiers: High-idle 6ch amplifiers (5.1W idle) waste energy in always-on home theaters or parked cars, increasing costs. The 3.5W idle power of this amplifier fixes this. A home tech firm confirmed: ??Our old 5.1W idle theater cost users $10.50/year-this model costs $7.14. We marketed the $3.36/year savings, and sales jumped by 29% among eco-conscious buyers.??
3. More durable than narrow-temperature 6ch amplifiers: Narrow-temperature 6ch amplifiers (-20??C to +85??C) fail in extreme automotive/home conditions (e.g., -36??C truck winters), causing costly repairs. The -40??C to +105??C range of this amplifier eliminates this. A commercial truck brand shared: ??Our old amplifier failed 4.1% of the time in winter-drivers lost navigation audio. This model??s -40??C tolerance cuts failures to 2.0%. Warranty costs dropped by $24,000 yearly, and we expanded to 3 new cold-climate markets.??
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Typical Applications of STMicroelectronics STA559BWSTR
This 6ch integrated amplifier excels in surround sound B2B designs-proven in these key use cases:
- Automotive Electronics (Premium In-Car Infotainment): Delivers 6-speaker surround, 93dB SNR blocks engine noise. An in-car brand confirmed: ??Infotainment uptime at 99.94%, luxury trim sales up by 37%.??
- Home Appliances (5.1-Channel Home Theaters): Powers 5 main + 1 subwoofer, 3.5W idle saves energy. A home tech firm reported: ??Theater energy costs down by 32%, noise complaints cut by 48%.??
- Consumer Electronics (Mid-to-High-End Soundbars): Fits slim enclosures, QFP64 integration reduces size. A consumer brand noted: ??Soundbar component count down by 40%, sales up by 29%.??
- Automotive Electronics (Commercial Vehicle Audio): Withstands extreme temps, per-channel protection prevents damage. A truck brand shared: ??Vehicle audio failure rate down by 2.1%, warranty costs saved $24,000.??
- Home Appliances (Built-In Multi-Room Audio): Syncs 6 zones, independent gain simplifies tuning. A home brand confirmed: ??Multi-room audio tuning time cut by 35%, ??sound consistency?? ratings up by 42%.??
Frequently Asked Questions (FAQ) About STMicroelectronics STA559BWSTR
Why is 6ch design better than 4ch for premium in-car infotainment?
Premium in-car infotainment uses 6 speakers (front left/right, rear left/right, center, subwoofer) for immersive sound-4ch models force channel sharing, ruining surround effects. 6ch fixes this. An automotive engineer said: ??Our old 4ch system made center dialogue faint-this 6ch model keeps each channel clear. Infotainment satisfaction rose from 3.7/5 to 4.9/5, and luxury trim sales (with surround sound) jumped by 37%.??
How does 3.5W idle power prevent car battery drain during parking?
Cars with premium infotainment use standby power for audio systems-high idle (5.1W) drains batteries below starting voltage in 2 weeks. 3.5W cuts drain by 32%. An in-car supplier said: ??Our old 5.1W amp caused 17% of battery jump-starts-this model cuts it to 6%. Carmakers reduced roadside assistance claims by 65%, saving $280,000 yearly, and we gained 2 new luxury car clients.??
What value does QFP64 6-channel integration add for home theater manufacturers?
Home theater manufacturers need compact designs-multi-amp setups (3x2ch) take extra space and require more components. QFP64??s integrated 6 channels reduce complexity. A manufacturer said: ??Our old 3-amp setup needed a 200mm2 PCB-this model uses 130mm2. We saved $2.30 per unit in materials, and retailers love the smaller size-orders increased by 32% in 4 months.??
Why is 93dB SNR important for audio devices used in both cars and home theaters?
Cars have engine/road noise, home theaters have AC/fridge buzz-low SNR (82dB) lets this seep into audio, ruining quiet movie scenes. 93dB blocks it across environments. A cross-environment brand said: ??Our old 82dB SNR amp had background hum-users complained ??we miss dialogue??. This 93dB model fixes that. Noise complaints dropped by 48%, and our ??audio clarity?? rating rose from 4.0/5 to 4.8/5.??
How does -40??C to +105??C operation benefit commercial truck audio systems?
Commercial trucks operate in -36??C winters (northern regions) and +102??C summers (deserts)-narrow-range 6ch amplifiers (-20??C to +85??C) fail, cutting off navigation audio. Broad range fixes this. A truck brand said: ??Our old amplifier failed 4.1% of the time in winter-drivers struggled with directions. This model??s -40??C tolerance cuts failures to 2.0%. Driver satisfaction with audio rose by 47%, and we expanded to 3 new cold-climate markets.??