LM4905LQX

Audio Amplifiers Overview

The LM4905LQX is a mono Class AB audio amplifier integrated circuit manufactured by Texas Instruments. It delivers 1.07W of output power and operates on a supply voltage range of 2.2V to 5.5V. The device is housed in an 8-WQFN exposed pad package, also referred to as 8LLP. It supports surface mount mounting types and functions within an operating temperature range of -40°C to 85°C (TA). Key electrical characteristics include its classification as a linear audio amplifier with single-channel capability.

Audio Amplifiers Feature Summary

• Integrated thermal protection that limits current or shuts down the device if internal silicon temperature exceeds safe thresholds
• Includes depop functionality to reduce speaker pop noise during power transitions
• Features shutdown mode for power management efficiency

Audio Amplifiers Applications

• Portable audio devices requiring compact mono amplification
• Battery-powered consumer electronics
• Embedded audio systems with space constraints

Audio Amplifiers Procurement Notes

Verify the manufacturer part number matches exactly LM4905LQX from Texas Instruments. Confirm the package type is 8-WQFN Exposed Pad (8LLP) and check RoHS compliance status. Ensure the datasheet corresponds to the specific revision. Validate the operating temperature range and supply voltage specifications against project requirements before finalizing procurement decisions.

Audio Amplifiers Selection Notes

Select this component when a mono Class AB amplifier is required for low-voltage applications between 2.2V and 5.5V. Consider the 8-WQFN package for space-constrained designs. Evaluate the need for built-in thermal protection and depop features. Compare output power requirements against the 1.07W specification. Verify compatibility with surface mount assembly processes and the specified operating temperature range.

Audio Amplifiers Part Context

The LM4905LQX belongs to the Texas Instruments LM4905 series of audio amplifiers. This series focuses on providing high-quality audio performance in small form factors suitable for portable applications. The LQX suffix indicates the specific package variant and tape-and-reel packaging configuration. It is designed to replace discrete solutions in mono audio channels where size and power efficiency are critical.

Audio Amplifiers Replacement Considerations

Consult official Texas Instruments documentation for direct pin-to-pin replacements or functional equivalents within the LM4905 family. Verify that any substitute maintains the same 8-WQFN package dimensions and electrical characteristics.