E-TDA7377 - 2x38W Dual/Quad Audio Amplifier | STMicroelectronics
料号： E-TDA7377 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.1924 | $1.19 |
E-TDA7377 概述
An audio power amplifier is an electronic device that increases the amplitude of low-power audio signals to a level sufficient to drive loudspeakers. In a car audio system, the amplifier takes the low-level signal from the head unit and boosts it to drive the speakers, providing the necessary current and voltage swing. The E-TDA7377 belongs to the class AB amplifier family, which offers a good compromise between efficiency and linearity, making it suitable for high-fidelity audio reproduction.
Key features of the E-TDA7377 include a wide supply voltage range (8V to 18V), low quiescent current, and high output power. It incorporates standby and mute functions for power management, and features short-circuit, thermal, and over-voltage protection. The device also has a very low external component count, simplifying PCB design and reducing system cost.
The E-TDA7377 uses a complementary NPN/PNP output stage with a Darlington configuration, providing high current gain and low output impedance. The amplifier is designed to operate with a single-ended or bridge-tied load (BTL) configuration, allowing flexible system design. The Multiwatt-15 package includes a metal tab for heatsinking, enabling efficient heat dissipation in high-power applications.
Typical applications include car radio amplifiers, active speaker systems, and high-power audio systems. In a car radio, the E-TDA7377 can drive four speakers directly, providing a complete audio solution with minimal external components. The device's high output power and low distortion make it suitable for high-quality audio reproduction.
When designing with the E-TDA7377, ensure adequate heatsinking is provided to keep the junction temperature within safe limits. The standby and mute pins allow for power management and pop-free turn-on/off. Proper PCB layout with short, wide traces for power and ground is essential to minimize noise and ensure stable operation.
直接替换替代料： E-TDA7377 ——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： E-TDA7377 （相同外形与封装尺寸） ——差异在于 Number of Channels, Mounting Type, Package, Supply Voltage Range, Input Impedance.
快速对比工具——选择替代料号进行并排对比：
TDA7377
✅ 直接替换📋 参考替代料（不在目录中）
TDA7375
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
E-TDA7377 最大额定值与电气特性
| Output Power (BTL) | 2x38W at 14.4V, 4Ω, 10% THD |
| Output Power (Single-Ended) | 4x10W at 14.4V, 4Ω, 10% THD |
| Supply Voltage Range | 8V to 18V |
| 静态电流 | 120 mA (typical) |
| Total Harmonic Distortion (THD) | 0.03% at 1kHz, 1W |
| Signal-to-Noise Ratio | 90 dB (typical) |
| Input Impedance | 30 kΩ (typical) |
| Output Offset Voltage | ±50 mV (max) |
| Standby Current | 1 μA (typical) |
| 工作温度范围 | -40°C to +150°C |
| 封装 | Multiwatt-15 |
| 安装类型 | Through Hole |
| Number of Channels | 4 (quad) or 2 (bridge) |
| Protection Features | Short-circuit, thermal, over-voltage |
| RoHS 状态 | Compliant |
E-TDA7377 引脚配置
| 引脚 1 | OUT1 — Output channel 1 |
| 引脚 2 | GND — Ground |
| 引脚 3 | IN1 — Input channel 1 |
| 引脚 4 | IN2 — Input channel 2 |
| 引脚 5 | GND — Ground |
| 引脚 6 | OUT2 — Output channel 2 |
| 引脚 7 | VS — Supply voltage |
| 引脚 8 | OUT3 — Output channel 3 |
| 引脚 9 | GND — Ground |
| 引脚 10 | IN3 — Input channel 3 |
| 引脚 11 | IN4 — Input channel 4 |
| 引脚 12 | GND — Ground |
| 引脚 13 | OUT4 — Output channel 4 |
| 引脚 14 | STBY — Standby control |
| 引脚 15 | MUTE — Mute control |
典型应用
E-TDA7377 适用于 6 应用s: Car Radio Amplifier, Active Speaker System, Home Theater System, Portable PA System, Musical Instrument Amplifier, Public Address System.
Car Radio Amplifier
The E-TDA7377 is designed for car radio applications, providing high output power (2x38W) to drive speakers directly. Its wide supply voltage range (8V to 18V) accommodates automotive battery variations. The built-in protections (short-circuit, thermal, over-voltage) ensure reliable operation in harsh environments. The standby and mute functions enable power management and pop-free operation. With minimal external components, it simplifies PCB design and reduces system cost.
推荐
Active Speaker System
In active speaker systems, the E-TDA7377 can be used to amplify audio signals for each driver (woofer, tweeter). Its low THD (0.03%) ensures high-fidelity sound reproduction. The quad single-ended mode (4x10W) allows driving four speakers independently. The Multiwatt-15 package with metal tab facilitates heatsinking for continuous high-power operation. The mute function prevents turn-on/off pops, enhancing user experience.
推荐
Home Theater System
The E-TDA7377 can be used in home theater systems to drive surround sound speakers. Its high output power (2x38W) provides sufficient volume for medium-sized rooms. The bridge-tied load configuration allows doubling the output power per channel. The low quiescent current (120 mA) reduces power consumption during idle. The standby function further reduces power draw when the system is not in use.
推荐
Portable PA System
For portable PA systems, the E-TDA7377 offers a compact solution with high output power. Its 8V to 18V supply range allows operation from batteries or external power supplies. The low quiescent current extends battery life. The protection features prevent damage from short circuits or overheating. The Multiwatt-15 package is suitable for through-hole mounting, simplifying assembly.
推荐
Musical Instrument Amplifier
The E-TDA7377 can be used in musical instrument amplifiers, such as guitar or keyboard amps. Its low distortion (0.03% THD) preserves the tonal quality of the instrument. The high output power (2x38W) provides ample volume for practice or small performances. The mute function allows silent tuning. The thermal protection ensures reliable operation during extended use.
推荐
Public Address System
In public address systems, the E-TDA7377 can drive multiple speakers for announcements or background music. Its high output power and low distortion ensure clear audio reproduction. The bridge-tied load configuration allows driving 4Ω speakers with high power. The standby function reduces power consumption when the system is idle. The over-voltage protection safeguards against supply transients.
推荐
推荐产品汇总
工程参考数据： E-TDA7377 ——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 | TDA7377 | TDA7375 | TDA7379 |
|---|---|---|---|---|
| Package | Multiwatt-15 | Multiwatt-15 | Multiwatt-15 | Multiwatt-15 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Power (BTL) | 2x38W | 2x38W | 2x20W | 2x40W |
| Supply Voltage Range | 8V to 18V | 8V to 18V | 8V to 18V | 8V to 18V |
| Quiescent Current | 120 mA | 120 mA | 100 mA | 150 mA |
| THD at 1kHz, 1W | 0.03% | 0.03% | 0.05% | 0.03% |
| Signal-to-Noise Ratio | 90 dB | 90 dB | 85 dB | 90 dB |
| Pinout Compatibility | Reference | Identical | Different | Different |
关键差异点
- High output power in BTL mode （对比 TDA7375)
- Low distortion （对比 TDA7375)
- Higher signal-to-noise ratio （对比 TDA7375)
设计说明
The E-TDA7377 can dissipate significant power at high output levels. For example, at 2x38W output, the power dissipation can exceed 20W. The Multiwatt-15 package has a metal tab that must be connected to a heatsink. Ensure the heatsink has sufficient thermal capacity to keep the junction temperature below 150°C. Use thermal compound between the tab and heatsink for optimal heat transfer.
For optimal performance, use short, wide traces for power and ground connections to minimize resistance and inductance. Place decoupling capacitors (100 nF and 1000 μF) close to the VS pin. Separate the ground paths for the power stage and signal stage to avoid ground loops and reduce noise. The standby and mute pins should be controlled with pull-up or pull-down resistors as specified in the datasheet.
Do not exceed the maximum supply voltage of 18V, as this can damage the amplifier. Ensure the standby and mute pins are properly driven to avoid unintended operation. When using bridge-tied load configuration, do not connect the speaker to ground, as this can cause short-circuit. Always use a heatsink, as operating without one can lead to thermal shutdown or permanent damage.
合规信息
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified as it is not an automotive-grade IC, but designed for automotive audio applications.
