LM4918LQ/NOPB

Audio Amplifiers Overview

The LM4918LQ/NOPB is a stereo audio amplifier with automatic gain control (AGC) in an LQ package. It delivers 1W into 8Ω loads with less than 1.0% THD+N. The device operates on a single supply voltage ranging from 2.7V to 5.5V. Key electrical parameters include a typical quiescent current of 18mA and a shutdown current of 1µA. It features thermal shutdown protection, click-and-pop suppression, and selectable standby modes.

Audio Amplifiers Feature Summary

• Integrated automatic gain control circuitry for dynamic range management
• Stereo bridged power amplifiers with high output capability
• Click and pop suppression circuitry for smooth audio transitions
• Thermal shutdown protection to safeguard against overheating

Audio Amplifiers Applications

• Portable computers
• Desktop computers
• Multimedia monitors

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix and package type against the manufacturer's official documentation before procurement. Confirm that the component meets all required environmental and operational specifications for the intended application. Ensure compatibility with existing system designs regarding pinout and electrical characteristics.

Audio Amplifiers Selection Notes

Select this component for applications requiring integrated AGC and stereo amplification in a compact form factor. Consider the thermal performance requirements when designing the PCB layout, as heat dissipation is critical for maintaining optimal operation. Evaluate the power supply constraints to ensure they align with the device's operating voltage range.

Audio Amplifiers Part Context

The LM4918 belongs to the Boomer audio integrated circuit family, designed by National Semiconductor (now Texas Instruments). These circuits are engineered to deliver high-quality audio performance while minimizing the need for external components. The LM4918 specifically combines stereo bridged amplifiers with AGC functionality, making it suitable for multimedia and portable computing applications.

Audio Amplifiers Replacement Considerations

Consult the manufacturer's datasheet or official substitution guide for confirmed equivalent part numbers. Verify pin compatibility, electrical specifications, and packaging details before replacing the component. Cross-reference with authorized distributors to ensure availability and authenticity of substitute parts.