STA8600A - High-Performance Audio Amplifier IC | STMicroelectronics
料号： STA8600A ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： STA8600A ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STA8600A （相同外形与封装尺寸） ——差异在于 Package, Protection Features, Mounting Type, Quiescent Current, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
STA8600A 最大额定值与电气特性
| 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 |
| 输出配置 | 4-channel (quad) |
| Load Impedance | 4Ω to 8Ω |
| 工作温度范围 | -40°C to +105°C |
| 封装 | PowerSO-36 |
| 安装类型 | Surface Mount |
| 热阻，结到环境 | 35°C/W |
| 静态电流 | 120 mA |
| Protection Features | Overcurrent, overtemperature, short-circuit |
| RoHS 状态 | Compliant |
| Amplifier Class | Class AB |
STA8600A 引脚配置
| 引脚 1 | OUT1+ — Positive output for channel 1 |
| 引脚 2 | OUT1- — Negative output for channel 1 |
| 引脚 3 | GND — Ground |
| 引脚 4 | OUT2+ — Positive output for channel 2 |
| 引脚 5 | OUT2- — Negative output for channel 2 |
| 引脚 6 | VCC — Power supply |
| 引脚 7 | OUT3+ — Positive output for channel 3 |
| 引脚 8 | OUT3- — Negative output for channel 3 |
| 引脚 9 | GND — Ground |
| 引脚 10 | OUT4+ — Positive output for channel 4 |
| 引脚 11 | OUT4- — Negative output for channel 4 |
| 引脚 12 | VCC — Power supply |
典型应用
STA8600A 适用于 6 应用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.
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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.
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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.
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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.
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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.
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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.
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推荐产品汇总
工程参考数据： STA8600A ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Higher output power than TDA7560 （对比 TDA7560)
- Lower THD than TDA7560 （对比 TDA7560)
- Wider supply voltage range than TDA7850 （对比 TDA7850)
设计说明
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.
合规信息
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified, but suitable for automotive audio applications.
