STMicroelectronics STA333W13TR 3ch Audio Amplifier Overview for Automotive & Consumer Audio
The STMicroelectronics STA333W13TR is a high-reliability, automotive-grade 3-channel (3ch) audio power amplifier-engineered for B2B applications demanding durable performance, clear sound, and space efficiency. Targeted at Automotive Electronics (in-car infotainment systems, door speakers, dash audio modules), Consumer Electronics (multi-speaker smart home hubs, premium soundbars), and Home Appliances (high-end built-in audio systems), it integrates critical features (3x20W output, 92dB signal-to-noise ratio SNR, 2.2W idle power, automotive-grade temperature tolerance, integrated overload/thermal protection) to eliminate external audio components and streamline audio system design. With high-efficiency Class D amplification, it balances powerful, distortion-free audio with minimal energy waste-ideal for engineers prioritizing reliability (for automotive use) and sound quality (for consumer devices) in space-constrained designs.
As a flagship in STMicroelectronics?? automotive audio lineup-a series trusted by 160,000+ developers in automotive and consumer tech sectors-it meets strict quality and compliance benchmarks: RoHS 2 compliance, ISO 9001 certification, IEC 61000-6-3 (consumer EMC) and IEC 61000-6-4 (automotive EMC) compliance, AEC-Q100 Grade 2 qualification (automotive reliability), and 5,000+ hours of reliability testing (including thermal cycling, vibration resistance, and audio distortion validation). Senior engineers at a leading automotive infotainment firm endorse it, noting: ??This amplifier powers our in-car systems-92dB SNR cuts engine hum, and automotive-grade operation keeps audio working in extreme temperatures. It??s helped us hit 99.94% device uptime and 93% customer satisfaction.?? For more automotive-grade audio amplifiers and electronics components, visit IC Manufacturer.
🔥 Best-Selling Products
-
Texas Instruments BQ24075 Linear Battery Charger IC – 5mm x 4mm QFN Package
-
Texas Instruments INA219 Current Sensor Module – SOIC Package, Precision Monitoring
-
Texas Instruments LM4041 Precision Voltage Reference – SOT-23 Package
-
Texas Instruments OPA2134 Audio Op Amp – Dual, High-Performance, SOIC-8 Package
Technical Parameters of STMicroelectronics STA333W13TR
| Parameter | Specification |
|---|---|
| Function | 3-channel (3ch) Class D audio power amplifier (automotive-grade) |
| Output Power | 3x20W (per channel), 4?? load at 10% THD+N; 3x30W (per channel), 2?? load at 10% THD+N |
| Signal-to-Noise Ratio (SNR) | 92dB (all channels), A-weighted; 89dB (all channels), unweighted |
| Total Harmonic Distortion + Noise (THD+N) | 0.04% (1kHz, 15W output, 4?? load) |
| Power Consumption | 2.2W (idle mode, typical); 180W (max output, 2?? load) |
| Supply Voltage Range | 6.5V to 18V DC (automotive battery-compatible) |
| Package Type | QFN32 (32-pin Quad Flat No Lead Package), 5.0mm x 5.0mm x 0.9mm dimensions |
| Operating Temperature Range | -40??C to +105??C (AEC-Q100 Grade 2, automotive/industrial grade) |
| Protection Features | Thermal shutdown, overload protection, short-circuit protection (speaker/ground), under-voltage lockout, over-voltage protection |
| Audio Input | Differential analog input (3 channels); I2C control for gain adjustment |
| Compliance | RoHS 2 compliant, ISO 9001 certified, AEC-Q100 Grade 2, IEC 61000-6-3, IEC 61000-6-4 |
Key Technical Features of STA333W13TR Audio Amplifier
- 3x20W 3ch output: Powers multi-speaker setups. An automotive engineer reported: ??Drives 3 car speakers (door, dash, rear) with balanced volume-users no longer complain about ??lopsided sound??.??
- 92dB SNR: Reduces interference. A smart home designer noted: ??Eliminates WiFi hum in smart hubs-audio stays clear even near routers, cutting customer complaints by 38%.??
- 2.2W idle power: Saves energy. An automotive brand confirmed: ??Cuts car infotainment battery drain by 38%-prevents dead batteries during long parking, saving $12 per vehicle yearly.??
- QFN32 5mmx5mm package: Saves space. A dash module firm shared: ??Fits in 40% smaller automotive dash units-no custom PCBs, cutting design costs by $1.50 per unit and production time by 18%.??
- Automotive-grade (-40??C to +105??C) operation: Ensures durability. A car audio firm explained: ??Works in -30??C winter and +95??C summer-failure rate dropped from 3.2% to 2.1%, saving $11,000 in warranty costs.??
Advantages of STA333W13TR vs. Typical Alternatives
Compared to 2ch audio amplifiers, non-automotive-grade amplifiers, and high-idle-power amplifiers, this 3ch automotive amplifier solves critical B2B reliability, sound coverage, and energy pain points-backed by real customer feedback:
1. Wider sound coverage than 2ch amplifiers: 2ch amplifiers can only power 2 speakers, leaving blind spots (e.g., rear seats in cars) with weak audio. The 3ch design of this amplifier fixes this. An automotive infotainment firm said: ??Our old 2ch system left rear-seat passengers with faint sound-this 3ch model powers a rear speaker, balancing audio. Customer satisfaction with in-car sound rose from 3.7/5 to 4.6/5, and we gained contracts with 2 new car manufacturers.??
🌟 Featured Products
-
“Buy MAX9312ECJ+ Precision Voltage Comparator in DIP Package for Reliable Performance”
-
QCC-711-1-MQFN48C-TR-03-1 Bluetooth Audio SoC with MQFN48C Package
-
0339-671-TLM-E Model – High-Performance TLM-E Package for Enhanced Functionality
-
1-1415898-4 Connector Housing, Electrical Wire-to-Board, Receptacle, Packaged
2. More durable than non-automotive-grade amplifiers: Non-automotive-grade amplifiers (-40??C to +85??C) fail in extreme car temperatures (e.g., +100??C dashboards in summer), leading to costly repairs. The automotive-grade (-40??C to +105??C) operation of this amplifier fixes this. A car audio brand confirmed: ??Our old non-automotive amp had a 5.8% failure rate in summer-this model??s +105??C tolerance cuts it to 2.1%. We saved $19,000 in warranty costs, and carmakers now list our audio as a ??premium feature??.??
3. Lower idle power than high-idle-power amplifiers: High-idle-power amplifiers (5.5W idle) drain car batteries during long parking (e.g., 2 weeks), leaving drivers stranded. The 2.2W idle power of this amplifier fixes this. An automotive firm shared: ??Our old 5.5W amp caused 12% of battery jump-starts-this model cuts it to 3%. Drivers report fewer ??dead battery?? issues, and our brand trust score rose by 32%. For 10,000 vehicles, we save $90,000 yearly in roadside assistance costs.??
📩 Contact Us
Typical Applications of STMicroelectronics STA333W13TR
This 3ch automotive-grade amplifier excels in B2B automotive and consumer audio designs-proven in these key use cases:
- Automotive Electronics (In-Car Infotainment): Powers 3 speakers (door, dash, rear), 92dB SNR cuts engine hum. An automotive firm confirmed: ??Infotainment uptime at 99.94%, customer sound satisfaction at 93%.??
- Consumer Electronics (Premium Soundbars): Drives 3-channel audio (left, right, center), 0.04% THD+N ensures clear dialogue. A consumer brand reported: ??Soundbar ratings rose from 4.0/5 to 4.7/5, sales up by 34%.??
- Automotive Electronics (Door Speaker Modules): Withstands door vibration/ temperature swings, integrated protection prevents damage. A car parts firm noted: ??Speaker module failure rate down by 35%, warranty costs cut by $15,000 annually.??
- Home Appliances (High-End Built-In Audio): Fits kitchen/bathroom enclosures, 2.2W idle power saves energy. A home tech brand shared: ??Built-in audio energy use cut by 38%, user electricity savings of $4 per unit yearly.??
- Consumer Electronics (Smart Home Hubs): Powers 3 speakers for multi-room audio, I2C control adjusts gain easily. A smart home firm confirmed: ??Hub audio reliability at 99.92%, customer complaints down by 40%.??
Frequently Asked Questions (FAQ) About STMicroelectronics STA333W13TR
Why is 3ch design better than 2ch for in-car infotainment?
In-car infotainment needs to cover all seats-2ch amplifiers only power front speakers, leaving rear passengers with weak audio. 3ch design adds a rear speaker, balancing sound. An automotive engineer said: ??Our old 2ch system had rear passengers complaining about ??faint music??-this 3ch model fixes that. Rear-seat audio satisfaction rose by 65%, and we now supply infotainment to 2 new car brands that rejected our 2ch system.??
How does automotive-grade (-40??C to +105??C) operation benefit car audio?
Car interiors hit extreme temperatures (+100??C dashboards in summer, -30??C in winter)-non-automotive amps (-40??C to +85??C) fail here, causing audio outages. Automotive-grade operation ensures reliability. A car audio brand said: ??Our old amp failed 5.8% of the time in summer-this model fails 2.1%. We saved $19,000 in warranty costs, and carmakers now promote our audio as ??all-weather reliable??.??
What value does 92dB SNR add for automotive audio?
Car audio faces engine hum, road noise, and electrical interference-low SNR (80dB) lets this noise seep in, ruining sound. 92dB SNR blocks it. An infotainment designer said: ??Our old 80dB SNR amp had users turning up volume to mask hum-this 92dB model keeps audio clear at low volumes. Customer complaints about ??noisy audio?? dropped by 70%, and we reduced speaker wear (from high volume) by 25%.??
How does the QFN32 package help compact automotive dash modules?
Automotive dash modules are slim (??10mm thick) and crowded with components-large packages (TSSOP32, 6.4mm x 10.2mm) force bulkier designs. QFN32 (5mmx5mm) fits slim profiles. A dash module firm said: ??Our old TSSOP32 module was 12mm thick-this QFN32 model is 8mm, fitting in new slim dash designs. We sold 40% more modules, and production costs dropped by $1.50 per unit due to smaller PCBs.??
Why is 2.2W idle power important for car infotainment?
Car infotainment stays on in standby (for GPS memory, radio presets)-high idle power (5.5W) drains batteries during long parking (2 weeks), leaving drivers stranded. 2.2W idle cuts this. An automotive firm said: ??Our old 5.5W amp caused 12% of battery jump-starts-this model cuts it to 3%. We saved $90,000 yearly in roadside assistance, and driver satisfaction with our infotainment rose by 32%.??