The LM4871I from STMicroelectronics is a high-quality audio power amplifier that offers a seamless audio experience for a wide range of applications. Designed with the latest technology, this amplifier is capable of delivering 3W of continuous average power to a 3Ω load with less than 10% THD+N from a 5V power supply.

Key Features

• Amplifier Type: Class AB
• Output Power: 3W into 3Ω at 5V
• THD+N: Less than 10% at the rated power
• Supply Voltage Range: 2.0V to 5.5V
• No External Output Coupling Capacitors: Simplifies circuit design
• Shutdown Mode: Features a low-power sleep mode
• External Gain Configuration: Flexibility in gain adjustment

The LM4871I is equipped with a shutdown pin that allows the user to enable or disable the device, thus conserving power when the amplifier is not in use. This makes it an ideal choice for battery-powered devices where energy efficiency is paramount.

Moreover, the device is designed to operate without external bootstrap capacitors or snubber networks, which simplifies the overall design and reduces the number of external components needed. This not only saves space on the PCB but also reduces the overall cost of the design.

The flexibility of external gain configuration allows the user to set the gain of the amplifier as required by the application, providing greater control over the audio output. Additionally, the LM4871I is unity-gain stable and can be configured by external gain-setting resistors.

Applications

The LM4871I is suitable for a variety of applications where high-quality audio amplification is required, such as:

• Mobile Phones
• Portable Computers
• Personal Digital Assistants (PDAs)
• Portable DVD Players
• Games

With its impressive set of features and its ability to provide high-quality audio in a compact form factor, the LM4871I from STMicroelectronics stands out as a top choice for designers and engineers looking to enhance the audio capabilities of their products.