規格
| 屬性 | 價值 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Type | Class AB |
| Output Type | 1-Channel (Mono) |
| Max Output Powerx Channels @ Load | 1.1W x 1 @ 8Ohm |
| Voltage - Supply | 2.7V ~ 5.5V |
| Features | Short-Circuit and Thermal Protection, Shutdown |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Supplier Device Package | 8-SOIC |
概述
Description
The TPA4861DR is a stereo audio power amplifier integrated circuit produced by Texas Instruments. It is designed to drive speakers directly and is commonly used in portable audio devices due to its compact size and efficient power usage. The IC can deliver up to 1.5 watts per channel into an 8-ohm load, making it suitable for applications requiring medium power output. It operates from a single power supply and features a low total harmonic distortion (THD) level, ensuring high-quality audio reproduction. The TPA4861DR incorporates thermal and short-circuit protection to prevent damage under adverse conditions. Its differential input design helps in reducing noise and improving sound clarity. Additionally, the chip supports a shutdown mode to conserve power when the amplifier is not in use. This IC typically comes in a small SOIC package, making it easy to integrate into various electronic designs. Overall, the TPA4861DR is a versatile and reliable choice for enhancing audio performance in portable electronic devices.
Equivalent
The TPA4861DR is a Class-AB audio power amplifier. Equivalent products can include other audio amplifiers with similar specifications, such as the LM4861 from Texas Instruments, the MAX4410 from Maxim Integrated, and the TDA2822M from STMicroelectronics. When choosing an equivalent, consider factors like power output, voltage requirements, and package type to ensure compatibility with your application. Always refer to the datasheets for detailed specifications and pin compatibility.
Features
The TPA4861DR is a mono, Class-D audio power amplifier commonly used in battery-powered devices. Key features include:
1. Output Power: Delivers up to 1.4W into an 8-ohm load at 5V supply, suitable for driving small speakers.
2. Efficiency: High efficiency around 85-90% helps reduce heat dissipation and extend battery life.
3. Low THD+N: Offers low Total Harmonic Distortion plus Noise (THD+N) for clear audio output.
4. Wide Supply Range: Operates from 2.5V to 5.5V, making it versatile for various applications.
5. Shutdown Mode: Includes a low-power shutdown mode to conserve energy.
6. Thermal Protection: Built-in thermal shutdown helps prevent damage from overheating.
7. Short-Circuit Protection: Protects the device in case of an output short.
8. Space-Saving Package: Comes in an 8-pin SOIC package, allowing for a compact design.
9. Pop Reduction: Features integrated circuitry to minimize pop noise during power on/off transitions.
These attributes make the TPA4861DR suitable for portable audio applications where space and power efficiency are critical.
1. Output Power: Delivers up to 1.4W into an 8-ohm load at 5V supply, suitable for driving small speakers.
2. Efficiency: High efficiency around 85-90% helps reduce heat dissipation and extend battery life.
3. Low THD+N: Offers low Total Harmonic Distortion plus Noise (THD+N) for clear audio output.
4. Wide Supply Range: Operates from 2.5V to 5.5V, making it versatile for various applications.
5. Shutdown Mode: Includes a low-power shutdown mode to conserve energy.
6. Thermal Protection: Built-in thermal shutdown helps prevent damage from overheating.
7. Short-Circuit Protection: Protects the device in case of an output short.
8. Space-Saving Package: Comes in an 8-pin SOIC package, allowing for a compact design.
9. Pop Reduction: Features integrated circuitry to minimize pop noise during power on/off transitions.
These attributes make the TPA4861DR suitable for portable audio applications where space and power efficiency are critical.
Pinout
The TPA4861DR is an integrated circuit designed by Texas Instruments, primarily used as an audio power amplifier. It comes in a surface-mount SOIC (Small Outline Integrated Circuit) package with 8 pins. Here is a brief overview of its pin functions:
1. IN+ (Pin 1): Non-inverting input for the audio signal.
2. IN- (Pin 2): Inverting input for the audio signal.
3. VO+ (Pin 3): Positive differential output for the load (speaker).
4. VO- (Pin 4): Negative differential output for the load (speaker).
5. VDD (Pin 5): Supply voltage for the device.
6. GND (Pin 6): Ground connection.
7. SHUTDOWN (Pin 7): Used to place the amplifier in a low-power shutdown mode.
8. BIAS (Pin 8): Used for biasing internal circuitry.
The TPA4861DR is designed for driving low impedance speakers and offers features like thermal and short-circuit protection. It's commonly used in applications such as portable audio devices or any system requiring efficient audio amplification with minimal external components.
1. IN+ (Pin 1): Non-inverting input for the audio signal.
2. IN- (Pin 2): Inverting input for the audio signal.
3. VO+ (Pin 3): Positive differential output for the load (speaker).
4. VO- (Pin 4): Negative differential output for the load (speaker).
5. VDD (Pin 5): Supply voltage for the device.
6. GND (Pin 6): Ground connection.
7. SHUTDOWN (Pin 7): Used to place the amplifier in a low-power shutdown mode.
8. BIAS (Pin 8): Used for biasing internal circuitry.
The TPA4861DR is designed for driving low impedance speakers and offers features like thermal and short-circuit protection. It's commonly used in applications such as portable audio devices or any system requiring efficient audio amplification with minimal external components.
Manufacturer
The TPA4861DR is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic components, including integrated circuits and embedded processors. TI's products are used in various applications, such as automotive systems, industrial automation, personal electronics, and communications infrastructure. The company is known for its innovation and significant contributions to the electronics industry, making it one of the leading semiconductor companies worldwide.
Application
The TPA4861DR is a stereo audio power amplifier designed for applications requiring high-quality sound output with low distortion. Its primary application areas include:
1. Portable Audio Devices: Ideal for enhancing sound in portable speakers and headphone amplifiers.
2. Consumer Electronics: Used in televisions, radios, and set-top boxes for improved audio performance.
3. Computers and Accessories: Suitable for desktop and laptop sound systems, as well as external audio peripherals.
4. Automotive Audio Systems: Provides clear and robust sound in car audio applications.
5. Home Audio Systems: Enhances audio output in mini stereo systems and home theater setups.
These applications benefit from its efficiency, low power consumption, and compact size.
1. Portable Audio Devices: Ideal for enhancing sound in portable speakers and headphone amplifiers.
2. Consumer Electronics: Used in televisions, radios, and set-top boxes for improved audio performance.
3. Computers and Accessories: Suitable for desktop and laptop sound systems, as well as external audio peripherals.
4. Automotive Audio Systems: Provides clear and robust sound in car audio applications.
5. Home Audio Systems: Enhances audio output in mini stereo systems and home theater setups.
These applications benefit from its efficiency, low power consumption, and compact size.
Package
The TPA4861DR is housed in a SOIC (Small Outline Integrated Circuit) package, specifically an 8-pin SOIC package, often referred to as "D" or "DR" in Texas Instruments' packaging codes. This package type is commonly used for surface-mount applications in electronic circuits.
