LM4897MM/NOPB

Audio Amplifiers Overview

The LM4897 is a 1.1W audio power amplifier designed for mobile phones and portable devices. It delivers 1.1W to an 8Ω BTL load at 5V with <1% THD+N, or 350mW at 3V. Operating from 2.6V to 5.5V, it features unity-gain stability, no output coupling capacitors, and advanced pop/click circuitry. Shutdown current is typically 0.1μA. PSRR is 62dB at 5V. Available in VSSOP-8 package.

Audio Amplifiers Feature Summary

• Integrated fade-in/fade-out functionality eliminates unnatural sounds during shutdown transitions.
• Advanced pop and click circuitry prevents noise during turn-on and turn-off events.
• Bridge-tied load (BTL) configuration enables high output power without requiring output coupling capacitors.
• Ultra-low current shutdown mode minimizes power consumption when the device is not in use.

Audio Amplifiers Applications

• Mobile phones
• PDAs
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify component status as obsolete. Confirm availability through authorized distributors or surplus channels. Validate datasheet revision SNAS183E against specific manufacturing lot requirements. Ensure compatibility with existing PCB footprints and thermal management designs before procurement.

Audio Amplifiers Selection Notes

Select this component for applications requiring minimal external components and low quiescent current. The BTL architecture suits space-constrained portable designs. Verify that the required output power aligns with the supply voltage range of 2.6V to 5.5V. Consider the VSSOP package size for board layout constraints.

Audio Amplifiers Part Context

Part of Texas Instruments' Boomer audio amplifier family. Designed specifically for high-quality output power with minimal external components. Intended for demanding applications in mobile communication devices where space and power efficiency are critical.

Audio Amplifiers Replacement Considerations

LM4890MM/NOPB: Similar 1W mono amplifier but lacks fade-in/fade-out feature.

Audio Amplifiers FAQ

Does the LM4897 require output coupling capacitors?

No, the LM4897 uses a bridge-tied load (BTL) configuration that eliminates the need for output coupling capacitors.

What is the typical shutdown current?

The typical shutdown current is 0.1μA when the shutdown pin is driven logic low.