LM4961LQX/NOPB

Audio Amplifiers Overview

The LM4961LQX/NOPB is a mono audio power amplifier with an integrated boost converter, designed for driving ceramic speakers in portable devices. It delivers a typical 15Vp-p output swing in bridged-tied load (BTL) mode to a 2μF + 30Ω load from a 3.2V to 5.0V supply. The device features low quiescent current of 7mA and shutdown current of 0.1μA. It includes click/pop elimination circuitry, thermal shutdown protection, and external gain configuration capabilities.

Audio Amplifiers Feature Summary

• Integrates a boost converter with variable output voltage to drive capacitive loads like ceramic speakers without bootstrap capacitors or snubber circuits.
• Features advanced click and pop circuitry that eliminates noise during turn-on and turn-off transitions.
• Includes a band switch function allowing the amplifier to operate in both receiver mode and ringer/loudspeaker mode using a single device.
• Provides thermal shutdown protection and a low-power consumption shutdown mode.

Audio Amplifiers Applications

• Cellphones
• PDAs

Audio Amplifiers Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest documentation before integration. Confirm that the application circuit design accounts for the exposed die attach paddle thermal requirements specified in the datasheet. Ensure input signals remain within absolute maximum ratings to prevent damage.

Audio Amplifiers Selection Notes

Select this component when driving high-impedance capacitive loads such as ceramic speakers where standard output coupling capacitors are undesirable. Consider the external gain setting resistors and feedback capacitor values to optimize bandwidth and stability. Evaluate the PCB layout for thermal dissipation through the exposed pad to maintain junction temperature limits.

Audio Amplifiers Part Context

This part belongs to Texas Instruments' Boomer audio power amplifier family, which focuses on providing high-quality output power with minimal external components. The LM4961 specifically targets applications requiring high voltage output swings from low supply voltages by integrating the necessary DC-DC conversion stage directly on the chip.

Audio Amplifiers Replacement Considerations

LM4961LQBD