STA8600A - High-Performance Audio Amplifier IC | STMicroelectronics
部品番号: STA8600A ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.75 | $8.75 |
| 10 | $7.92 | $79.20 |
| 100 | $6.85 | $685.00 |
| 500 | $5.98 | $2,990.00 |
| 1,000 | $5.25 | $5,250.00 |
STA8600A 概要
An audio amplifier is an electronic device that increases the amplitude of audio signals, driving speakers or transducers. It is a critical component in the audio signal chain, converting low-power audio signals into high-power outputs suitable for loudspeakers. Audio amplifiers are classified into classes (A, B, AB, D) based on their operating principles and efficiency. The STA8600A is a Class AB amplifier, offering a balance between linearity and efficiency, making it suitable for high-fidelity audio reproduction.
Key features of the STA8600A include a high signal-to-noise ratio of 100 dB, low total harmonic distortion of 0.01% at 1 kHz, and a wide operating temperature range of -40°C to +105°C. The device integrates multiple protection features, including overcurrent, overtemperature, and short-circuit protection, ensuring reliable operation in demanding environments. The PowerSO package with exposed pad enhances heat dissipation, allowing continuous high-power output without external heatsinks in moderate conditions.
The STA8600A utilizes a complementary bipolar output stage with a precision bias circuit, achieving low crossover distortion and stable quiescent current. The device supports multiple output configurations, including stereo and quad-channel modes, providing flexibility for various system designs. Its high PSRR of 80 dB minimizes power supply noise, ensuring clean audio output even with noisy supply rails.
Typical applications include car audio head units, external amplifiers, home theater systems, and active speakers. The wide supply voltage range makes it compatible with both 12V automotive systems and 18V consumer electronics. The integrated protection features reduce external component count, simplifying PCB design and improving system reliability.
When designing with the STA8600A, ensure adequate PCB copper area for thermal dissipation, especially when driving low-impedance loads at high power. The exposed pad must be soldered to a large ground plane to achieve the specified thermal resistance. Proper decoupling on the supply pins is essential to maintain stability and minimize distortion.
ドロップイン代替品: STA8600A — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: STA8600A （同一形状・フットプリント） — 相違点: Package, Protection Features, Mounting Type, Quiescent Current, Supply Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
STA8600B
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TDA7850
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.5 / 個
データシートを見る →TDA7560H
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.44 / 個
データシートを見る →STA8600A 最大定格＆電気的特性
| Output Power | 4 x 50W at 4Ω, 14.4V |
| Supply Voltage Range | 6V to 18V |
| Total Harmonic Distortion (THD) | 0.01% at 1 kHz |
| Signal-to-Noise Ratio (SNR) | 100 dB |
| Power Supply Rejection Ratio (PSRR) | 80 dB |
| 出力構成 | 4-channel (quad) |
| Load Impedance | 4Ω to 8Ω |
| 動作温度範囲 | -40°C to +105°C |
| パッケージ | PowerSO-36 |
| 実装タイプ | Surface Mount |
| 熱抵抗、接合-周囲間 | 35°C/W |
| 静止電流 | 120 mA |
| Protection Features | Overcurrent, overtemperature, short-circuit |
| RoHS ステータス | Compliant |
| Amplifier Class | Class AB |
STA8600A ピン構成
| ピン 1 | OUT1+ — Positive output for channel 1 |
| ピン 2 | OUT1- — Negative output for channel 1 |
| ピン 3 | GND — Ground |
| ピン 4 | OUT2+ — Positive output for channel 2 |
| ピン 5 | OUT2- — Negative output for channel 2 |
| ピン 6 | VCC — Power supply |
| ピン 7 | OUT3+ — Positive output for channel 3 |
| ピン 8 | OUT3- — Negative output for channel 3 |
| ピン 9 | GND — Ground |
| ピン 10 | OUT4+ — Positive output for channel 4 |
| ピン 11 | OUT4- — Negative output for channel 4 |
| ピン 12 | VCC — Power supply |
主な用途
STA8600A の用途: 6 件s: Car Audio Head Unit, External Car Amplifier, Home Theater System, Active Speakers, Marine Audio System, Portable PA System.
Car Audio Head Unit
The STA8600A provides 4 x 50W output power, making it ideal for car audio head units that require high-fidelity sound. Its wide supply voltage range (6V to 18V) accommodates automotive electrical systems, and the low THD (0.01%) ensures clean audio reproduction. The integrated protection features safeguard the amplifier and speakers from faults, enhancing system reliability. In a typical head unit, the STA8600A is placed between the audio processor and the speakers, with proper heatsinking on the PowerSO-36 package to manage thermal dissipation. The high SNR (100 dB) ensures minimal noise, delivering a premium listening experience.
おすすめ
External Car Amplifier
The STA8600A is well-suited for external car amplifiers, delivering up to 4 x 50W into 4Ω loads. Its high PSRR (80 dB) minimizes alternator noise, ensuring clean power delivery to speakers. The device's thermal resistance of 35°C/W requires adequate heatsinking, especially when driving low-impedance loads at high power. In an external amplifier, the STA8600A is typically mounted on a heatsink with thermal paste, and the exposed pad is soldered to a large copper area for optimal heat transfer. The wide operating temperature range (-40°C to +105°C) ensures reliable operation in hot vehicle interiors.
おすすめ
Home Theater System
The STA8600A can be used in home theater systems to drive surround sound speakers. Its quad-channel configuration supports 4.0 or 4.1 audio setups, providing immersive sound. The low THD (0.01%) and high SNR (100 dB) ensure accurate reproduction of audio tracks. In a home theater receiver, the STA8600A is placed on a PCB with a large ground plane for thermal management, and the supply voltage is typically 18V to achieve maximum output power. The device's protection features prevent damage from speaker shorts or overheating, making it a reliable choice for consumer electronics.
おすすめ
Active Speakers
The STA8600A is ideal for active speakers, where the amplifier is integrated into the speaker enclosure. Its compact PowerSO-36 package and high output power (4 x 50W) allow for a self-contained design. The device's thermal performance is critical in this application, as the enclosed space limits airflow. Designers should use a heatsink or a large aluminum plate to dissipate heat. The STA8600A's low quiescent current (120 mA) reduces power consumption during idle, which is beneficial for energy-efficient designs. The wide supply voltage range allows compatibility with various power adapters.
おすすめ
Marine Audio System
The STA8600A is suitable for marine audio systems, where reliability in harsh environments is essential. Its wide operating temperature range (-40°C to +105°C) and protection features make it robust against temperature extremes and electrical faults. The device's high PSRR (80 dB) helps reject noise from boat electrical systems. In a marine application, the STA8600A should be protected from moisture and corrosion, possibly with a conformal coating on the PCB. The PowerSO-36 package's exposed pad should be soldered to a large copper area for thermal management, as marine environments can have high ambient temperatures.
おすすめ
Portable PA System
The STA8600A can be used in portable PA systems, providing high output power in a compact form factor. Its wide supply voltage range (6V to 18V) allows operation from batteries or external power supplies. The device's low quiescent current (120 mA) extends battery life during idle periods. In a portable PA system, the STA8600A is often powered by a 12V battery, and the PowerSO-36 package is mounted on a heatsink to manage thermal dissipation. The integrated protection features ensure reliable operation during outdoor events, where speakers may be subject to shorts or overheating.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: STA8600A — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | STA8600B | TDA7850 | TDA7560 |
|---|---|---|---|---|
| Package | PowerSO-36 | PowerSO-36 | PowerSO-36 | PowerSO-36 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Power | 4 x 50W | 4 x 60W | 4 x 50W | 4 x 45W |
| Supply Voltage Range | 6V to 18V | 6V to 18V | 8V to 18V | 8V to 18V |
| THD | 0.01% | 0.01% | 0.01% | 0.02% |
| SNR | 100 dB | 100 dB | 100 dB | 95 dB |
| PSRR | 80 dB | 80 dB | 80 dB | 75 dB |
| Quiescent Current | 120 mA | 130 mA | 120 mA | 110 mA |
主な差別化要因
- Higher output power than TDA7560 （vs TDA7560)
- Lower THD than TDA7560 （vs TDA7560)
- Wider supply voltage range than TDA7850 （vs TDA7850)
設計ノート
The STA8600A in PowerSO-36 package has a junction-to-ambient thermal resistance of 35°C/W. At 4 x 50W output, power dissipation can reach 20W, causing a temperature rise of 700°C without proper heatsinking. Use a heatsink with thermal resistance below 5°C/W and ensure the exposed pad is soldered to a large copper area (at least 4 square inches) for reliable operation.
Place decoupling capacitors (100nF ceramic and 1000uF electrolytic) close to the VCC pins to minimize supply impedance and reduce distortion. Use a star-ground topology to separate power ground from signal ground, preventing ground loops that can introduce noise. The exposed pad must be connected to the ground plane with multiple vias for optimal thermal and electrical performance.
Do not operate the STA8600A without a load connected, as this can cause output stage instability. Ensure the supply voltage does not exceed 18V, as this can damage the device. When using the standby and mute pins, follow the recommended timing sequences to avoid pop noise. Always use a heatsink for continuous high-power operation, as the package alone cannot dissipate the heat generated at full output.
コンプライアンス情報
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified, but suitable for automotive audio applications.
