LM4895IBP/NOPB

Audio Amplifiers Overview

The LM4895IBP/NOPB is a fully differential audio power amplifier designed for mobile phones and portable devices. It delivers 1W continuous average power to an 8Ω load at 5VDC with less than 1% THD+N, or 1.4W to a 4Ω load. The device operates on a 2.2V to 5.5V supply, features a fixed internal gain of 6dB, and includes an ultra-low current shutdown mode (0.1µA typical). It eliminates the need for output coupling capacitors and incorporates improved pop & click circuitry.

Audio Amplifiers Feature Summary

• Fully differential amplification architecture providing bridged-mode output without external coupling capacitors
• Internal gain-setting resistors fix the differential gain at 6dB, minimizing external component requirements
• Ultra-low current shutdown mode allows flexible logic high or low selection to minimize power consumption
• Advanced pop and click circuitry eliminates audible noises during turn-on and turn-off transitions

Audio Amplifiers Applications

• Mobile phones
• PDAs
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm that the specific package variant matches your PCB footprint requirements. Check for available replacement options from Texas Instruments if long-term availability is required. Ensure design reviews account for the discontinuation timeline to prevent production delays.

Audio Amplifiers Selection Notes

Select this amplifier for applications requiring high-quality audio output in space-constrained portable designs. The fully differential topology offers advantages in power supply rejection and common-mode noise reduction compared to single-ended configurations. Consider thermal management requirements when driving low-impedance loads to ensure junction temperatures remain within safe operating limits.

Audio Amplifiers Part Context

This component belongs to the Boomer series of audio power amplifiers developed by Texas Instruments. The series focuses on delivering high output power with minimal external components, specifically targeting low-voltage mobile communication devices. The LM4895 utilizes advanced bridged-mode operation to maximize efficiency and sound quality within strict power constraints.

Audio Amplifiers Replacement Considerations

LM4941TM/NOPB is listed as a similar replacement option.