LM4879IBPX

Audio Amplifiers Overview

The LM4879IBPX is a Class-AB audio power amplifier from the Boomer series, manufactured by Texas Instruments. It delivers 1.1W continuous average power to an 8Ω BTL load at 5V with less than 1% THD+N. The device operates on a single supply voltage ranging from 2.2V to 5.0V. Key electrical specifications include a quiescent current of 5mA (typ) at 5V and a shutdown current of 0.1µA (typ). It features a bridge-tied load configuration eliminating output coupling capacitors.

Audio Amplifiers Feature Summary

• Eliminates output coupling capacitors and bootstrap components through internal bridged architecture
• Features advanced pop and click circuitry to prevent audible noise during power transitions
• Includes ultra-low current global shutdown mode for extended battery life in portable devices
• Integrates internal thermal shutdown protection to safeguard against overheating

Audio Amplifiers Applications

• Mobile phones
• Personal Digital Assistants (PDAs)
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the specific package suffix IBPX corresponds to the intended footprint, as the datasheet lists multiple variants including DSBGA and WSON. Confirm RoHS compliance status and lead-free designation directly with the manufacturer or authorized distributors. Ensure the ordering information matches the exact revision level required for your design implementation.

Audio Amplifiers Selection Notes

Select this component when designing space-constrained mobile applications requiring high efficiency without external inductors. The unity-gain stability allows flexible gain configuration via external resistors. Consider the thermal resistance characteristics of the specific package variant to ensure adequate heat dissipation under maximum load conditions.

Audio Amplifiers Part Context

This device belongs to the Texas Instruments Boomer family of audio power amplifiers. These amplifiers are engineered to deliver high-quality output power while minimizing the number of required external components. The LM4879 specifically targets low-power portable applications where minimal space and power consumption are primary design constraints.

Audio Amplifiers Replacement Considerations

LM4879MMBD

Audio Amplifiers FAQ

Does the LM4879 require output coupling capacitors?

No, the LM4879 does not require output coupling capacitors or snubber networks due to its bridged output configuration.

How is the shutdown function controlled?

The shutdown pin controls the bias circuitry; driving it logic low disables the amplifier, achieving an ultra-low current shutdown mode.