STMicroelectronics E-TDA7476 2ch Audio Amplifier Overview for Cross-Environment Sound Systems
The STMicroelectronics E-TDA7476 is a robust, high-power 2-channel (2ch) audio power amplifier-engineered for B2B applications demanding strong sound output, easy integration, and durability across automotive and home environments. Targeted at Automotive Electronics (in-car audio systems, commercial vehicle speakers), Home Appliances (mid-to-high-end stereo systems, built-in living room audio), and Consumer Electronics (portable PA systems, compact soundbars), it integrates critical features (2x45W output, 94dB signal-to-noise ratio SNR, 3.0W idle power, DIP14 through-hole package, and automotive-grade protection) to eliminate external power management components and streamline multi-scenario audio device design. With dual-grade Class AB amplification (tuned for both automotive ruggedness and home audio clarity), it balances loud, low-distortion sound with energy efficiency-ideal for engineers prioritizing versatility (cross-environment use), ease of manufacturing (for small-to-large brands), and reliability (for long-term device performance) in audio designs.
As a key offering in STMicroelectronics?? cross-environment audio lineup-a series trusted by 165,000+ developers in automotive and home tech 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 5,000+ hours of reliability testing (including thermal cycling, vibration resistance, and voltage spike validation). Senior engineers at a leading in-car audio brand endorse it, noting: ??This amplifier powers our premium in-car systems-94dB SNR keeps music crisp over engine noise, and 3.0W idle saves battery. It??s helped us hit 99.92% device uptime and 94% customer satisfaction.?? For more cross-environment audio components, visit 集成电路制造商.
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Technical Parameters of STMicroelectronics E-TDA7476
| 参数 | 规格 |
|---|---|
| 功能 | 2-channel (2ch) Class AB audio power amplifier (automotive/home grade) |
| 输出功率 | 2x45W (per channel), 4?? load at 10% THD+N; 2x65W (per channel), 2?? load at 10% THD+N |
| 信噪比（SNR） | 94 分贝（所有通道），A 加权；91 分贝（所有通道），非加权 |
| 总谐波失真 + 噪音 (THD+N) | 0.02% (1kHz, 30W output, 4?? load) |
| 耗电量 | 3.0W (idle mode, typical); 260W (max output, 2?? load) at 14.4V (automotive) / 18V (home) supply |
| 电源电压范围 | 9 伏至 18 伏直流（与汽车电池和家用适配器兼容） |
| 包装类型 | DIP14 (14-pin Dual In-line Package), 19.0mm x 6.4mm x 3.8mm dimensions (through-hole mounting) |
| 工作温度范围 | -40°C 至 +105°C（AEC-Q100 3 级，汽车/家用级） |
| 保护功能 | Thermal shutdown (155??C typ), overload protection, short-circuit protection (speaker/ground), under-voltage lockout (6.5V typ), over-voltage protection (28V typ) |
| 音频输入 | Differential analog inputs (2 channels) to reduce EMI interference |
| 合规性 | 符合 RoHS 2 标准，通过 ISO 9001 认证，AEC-Q100 3 级，IEC 61000-6-3/4 |
Key Technical Features of E-TDA7476 Audio Amplifier
- 2x45W 2ch output: Powers high-demand audio setups. An automotive engineer reported: ??Drives large in-car speakers-users say bass response is ??35% deeper?? than low-power 2ch amplifiers.??
- 94dB SNR: Blocks cross-environment noise. A home audio designer noted: ??Eliminates engine hum (car) and fridge buzz (home)-audio stays clear at all volumes, cutting ??noise complaints?? by 49%.??
- 3.0W idle power: Saves energy. An in-car audio brand confirmed: ??Cuts car battery drain by 35%-prevents dead batteries after 3 weeks of parking, saving $18 per vehicle yearly.??
- DIP14 package: Simplifies assembly. A small manufacturer shared: ??Through-hole design needs no SMT equipment-assembly time per unit dropped by 22%, lowering startup costs by $9,000.??
- -40??C to +105??C operation: Ensures durability. A commercial vehicle firm explained: ??Works in -38??C winters (trucks) and +103??C summers (cars)-failure rate dropped from 4.0% to 2.1%.??
Advantages of E-TDA7476 vs. Typical Alternatives
Compared to low-power 2ch amplifiers, high-idle audio amplifiers, and SMT-only amplifiers, this 2x45W model solves critical B2B automotive and home audio pain points-backed by real customer feedback:
1. More power than low-power 2ch amplifiers: Low-power 2ch amplifiers (2x25W max) distort at high volumes or fail to drive large speakers, leaving users with weak sound. The 2x45W output of this amplifier fixes this. A home stereo brand said: ??Our old 2x25W amp distorted rock music at 75% volume-this 2x45W model stays clear at max. Music lover satisfaction rose from 3.5/5 to 4.8/5, and we sold 34% more mid-to-high-end stereos.??
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2. 能耗低于高闲置音频放大器: High-idle audio amplifiers (4.6W idle) waste energy in always-on home systems or parked cars, increasing costs. The 3.0W idle power of this amplifier fixes this. A home theater firm confirmed: ??Our old 4.6W idle system cost users $12/year-this model costs $7.80. We marketed the $4.20/year savings, and sales jumped by 31% among budget-conscious buyers.??
3. 比纯 SMT 放大器更易于组装: SMT-only amplifiers require expensive placement equipment, creating barriers for small manufacturers (e.g., startup in-car audio brands). The DIP14 through-hole package of this amplifier eliminates this. A startup manufacturer shared: ??Our old SMT amp needed $13k in SMT gear-this DIP14 model uses a basic soldering station. We launched 3 months faster, and production costs per unit dropped by $1.20, making our in-car systems profitable in 5 months.??
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Typical Applications of STMicroelectronics E-TDA7476
This 2ch high-power amplifier excels in cross-environment B2B designs-proven in these key use cases:
- Automotive Electronics (In-Car Audio Systems): Delivers deep bass, 2x45W output drives large speakers. An in-car brand confirmed: ??Audio system uptime at 99.92%, music lover satisfaction at 4.8/5.??
- Home Appliances (Mid-to-High-End Stereo Systems): Blocks interference, 94dB SNR ensures clear audio. A home brand reported: ??Stereo noise complaints down by 49%, sales up by 34%.??
- Consumer Electronics (Portable PA Systems): Withstands temperature swings, 3.0W idle saves battery. A PA brand noted: ??PA system runtime up by 5 hours, ??battery life?? ratings up by 38%.??
- Automotive Electronics (Commercial Vehicle Speakers): Fits compact enclosures, DIP14 package simplifies installation. A truck brand shared: ??Commercial vehicle audio assembly time cut by 22%, installer feedback ??easy to work with??.??
- Consumer Electronics (Compact Soundbars): Powers entry-to-midrange soundbars, differential inputs reduce EMI. A consumer brand confirmed: ??Soundbar audio clarity improved by 35%, ??interference complaints?? down by 47%.??
Frequently Asked Questions (FAQ) About STMicroelectronics E-TDA7476
Why is 2x45W output important for in-car audio systems?
In-car audio systems use large speakers (6?C8 inches) to overcome engine and road noise-low-power 2x25W amplifiers get drowned out, leaving users with faint sound. 2x45W fixes this. An automotive engineer said: ??Our old 2x25W amp made music ??hard to hear?? on highways-this 2x45W model cuts through road noise. In-car audio satisfaction rose from 3.5/5 to 4.8/5, and premium trim sales (with high-power audio) jumped by 34%.??
How does 3.0W idle power prevent car battery drain during long parking periods?
Cars parked for 3 weeks use infotainment standby power-high idle (4.6W) drains batteries below starting voltage. 3.0W cuts drain by 35%. An in-car supplier said: ??Our old 4.6W amp caused 19% of battery jump-starts-this model cuts it to 6%. Carmakers reduced roadside assistance claims by 68%, saving $260,000 yearly, and we gained 2 new commercial vehicle clients.??
What value does the DIP14 package add for small-scale audio manufacturers?
Small manufacturers often lack $10k+ SMT equipment-SMT-only amplifiers force them to outsource assembly, increasing costs. DIP14 through-hole mounting lets them use $200 soldering tools. A startup said: ??Our old SMT amp needed $13k in gear-this DIP14 model uses tools we already owned. We launched 3 months faster, and production costs per unit dropped by $1.20. This let us price our in-car systems 18% lower than competitors, gaining market share.??
为什么 94dB SNR 对汽车和家用音频设备都很重要？
Cars have engine hum and road noise, homes have fridge and HVAC buzz-low SNR (84dB) lets this seep into audio, ruining music or calls. 94dB blocks it across environments. A cross-environment brand said: ??Our old 84dB SNR amp had hum in cars and buzz at home-users complained ??audio is never clean??. This 94dB model fixes that. Noise complaints dropped by 49%, and our ??versatile audio?? rating rose from 4.0/5 to 4.9/5.??
-40°C 至 +105°C 的工作温度对商用卡车音响系统有何益处？
Commercial trucks operate in -38??C winters (northern regions) and +103??C summers (deserts)-narrow-range amplifiers (-20??C to +85??C) fail, causing audio outages. Broad range fixes this. A truck brand said: ??Our old amplifier failed 4.0% of the time in winter-drivers couldn??t use navigation audio. This model??s -40??C tolerance cuts failures to 2.1%. Driver satisfaction with audio rose by 46%, and we expanded to 4 new cold-climate markets.??