LM4990LD/NOPB

Audio Amplifiers Overview

The LM4990LD/NOPB is a Texas Instruments audio power amplifier in a 10-pin HVSON package. It operates on a single supply voltage ranging from 2.2V to 5.5V and delivers up to 1.25W of continuous average power into an 8Ω load at 5V with less than 1% THD+N. The device features selectable shutdown logic levels, unity-gain stability, and advanced circuitry to eliminate turn-on/off noise.

Audio Amplifiers Feature Summary

• Features a low-power consumption shutdown mode with user-selectable high or low logic level activation.
• Includes improved click and pop circuitry that eliminates audible noise during power transitions.
• Operates without requiring output coupling capacitors, snubber networks, or bootstrap capacitors.
• Allows external gain configuration capability through simple resistor selection.

Audio Amplifiers Applications

• Mobile phones
• PDAs
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the specific package suffix LD corresponds to the required HVSON footprint and pinout for your PCB layout. Confirm the shutdown logic configuration matches your system control signals, as this variant supports selectable modes unlike fixed-logic alternatives.

Audio Amplifiers Selection Notes

Select this component when space constraints require a compact HVSON package while maintaining bridge-tied load performance. Ensure the application utilizes a single-supply architecture within the 2.2V to 5.5V range and requires minimal external passive components for implementation.

Audio Amplifiers Part Context

This part belongs to the LM4990 family of 2-watt audio amplifiers designed for portable communication devices. It shares core amplifier topology with other variants but differs in packaging and specific logic configurations available across the product line.

Audio Amplifiers Replacement Considerations

LM4990MM/NOPB (VSSOP package)

Audio Amplifiers FAQ

How is the shutdown mode configured?

The shutdown mode can be set to trigger on either a high or low logic signal by connecting the Shutdown Mode pin to VDD or GND, respectively.

Does the LM4990 require output coupling capacitors?

No, the device is designed to operate without output coupling capacitors, snubber networks, or bootstrap capacitors.