IS31AP4991A-GRLS2-TR

Overview

The IS31AP4991A-GRLS2-TR is a monolithic Class-AB audio power amplifier manufactured by Lumissil Microsystems in an SOP-8 package. It delivers 1.1W continuous RMS output power into an 8Ω load at 5V supply voltage with 1% THD+N. The device operates from a VCC range of 2.7V to 5.5V and features an active-low shutdown mode that reduces supply current to less than 1μA. Key electrical characteristics include a typical quiescent current of 3.0mA, a power supply rejection ratio (PSRR) of 56dB at 217Hz, and ultra-low distortion of 0.074% at 0.5W output.

Feature Summary

• Bridge-tied load (BTL) architecture for high efficiency and reduced external component count
• Active-low shutdown mode enabling ultra-low standby consumption
• Near-zero click-and-pop performance during power transitions
• Internal thermal shutdown protection for enhanced reliability

Applications

• Mobile phones
• Portable electronic devices
• Notebook computers
• Personal Digital Assistants (PDAs)

Procurement Notes

Verify the specific suffix -GRLS2-TR corresponds to the SOP-8 lead-free package with a reel quantity of 2500 units. Confirm compliance requirements such as RoHS and Halogen-Free status directly with the manufacturer or authorized distributors before finalizing procurement orders.

Selection Notes

Select this component for single-channel mono audio applications requiring high output power within a compact footprint. Ensure the design accommodates the required bypass capacitors (CBYPASS and CS) to optimize PSRR and minimize low-frequency noise. Consider the wake-up time dependency on the bypass capacitor size when designing power sequencing circuits.

Part Context

This part belongs to the IS31AP4991A series of audio amplifiers designed for mobile and portable electronics. It serves as a cost-effective solution for reducing bill-of-materials complexity by integrating BTL output stages and shutdown controls into a small 8-pin surface-mount package suitable for space-constrained designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference lists or contact Lumissil Microsystems for validated alternatives.