LM4674ATL/NOPB

The LM4674ATL/NOPB is a high-performance audio amplifier integrated circuit (IC) produced by Texas Instruments. It is designed for portable audio applications, providing a compact and efficient solution for driving speakers in devices such as smartphones, tablets, and portable speakers.

Key Features:

1. Amplification Type: The LM4674 is a Class D audio amplifier, which means it operates with high efficiency, reducing heat generation and extending battery life in portable applications.

2. Output Power: The amplifier can deliver up to 2.5W of output power per channel into a 4-ohm load, making it suitable for driving small speakers directly.

3. Supply Voltage: It operates over a wide supply voltage range, typically from 2.5V to 5.5V, allowing it to be used in various battery-powered applications.

4. Low Distortion: The LM4674 features low total harmonic distortion (THD) and noise, ensuring high-quality audio reproduction with minimal interference.

5. Integrated Features: The IC includes built-in features such as thermal shutdown protection, short-circuit protection, and a mute function, enhancing reliability and user experience.

6. Package Type: The LM4674ATL/NOPB is available in a small, thermally efficient package (usually a TSSOP or similar), which is ideal for space-constrained designs.

7. Efficiency: With its Class D architecture, the LM4674 achieves high efficiency, often exceeding 85%, which is crucial for battery-operated devices to maximize runtime.

8. External Components: The design typically requires minimal external components, simplifying the overall circuit design and reducing the footprint on the PCB.

9. Applications: It is suitable for a variety of applications, including portable speakers, televisions, computer audio systems, and other consumer electronics where high-quality audio amplification is required.

Electrical Characteristics:

• Input Impedance: The amplifier has a high input impedance, allowing it to interface easily with various audio sources.
• Output Impedance: The output stage is designed to drive low-impedance loads effectively, ensuring good performance with typical speaker configurations.
• Frequency Response: The LM4674 provides a wide frequency response, making it capable of reproducing a full range of audio frequencies.

Conclusion:

The LM4674ATL/NOPB from Texas Instruments is a versatile and efficient audio amplifier IC that meets the demands of modern portable audio applications. Its combination of high output power, low distortion, and integrated protection features makes it an excellent choice for designers looking to enhance audio performance in compact electronic devices.