IS31AP2005-DLS2-TR

Overview

The IS31AP2005 is a high-efficiency, 2.95W mono Class-D audio power amplifier featuring a low-noise, filter-less PWM architecture that eliminates the need for an output LC filter. Operating on a single 5V supply, it drives a 4Ω speaker load at 2.95W (THD+N=10%) and an 8Ω load at 1.70W. The device includes integrated pop-and-click suppression, short-circuit protection, and thermal shutdown. It supports fully differential or single-ended inputs with externally configurable gain via input resistors.

Feature Summary

• Filter-less PWM architecture reduces external component count and system cost by eliminating the output LC filter.
• Fully differential design minimizes RF rectification and removes the requirement for a bypass capacitor.
• Integrated pop-and-click suppression circuitry prevents audible noise during power-up and power-down sequences.
• Built-in short-circuit and thermal protection mechanisms ensure robust operation under fault conditions.

Applications

• Wireless or cellular handsets
• Portable DVD players
• Notebook PCs
• USB speakers
• Portable gaming devices

Procurement Notes

Verify the package type matches the specific suffix: DLS2 indicates DFN-8, while SLS2 indicates MSOP-8. Confirm the operating temperature range requirements align with the industrial specification of -40°C to +85°C. Ensure the application voltage falls within the 2.7V to 5.5V supply range. Check for RoHS and Halogen-Free compliance if required by your manufacturing standards.

Selection Notes

Select this amplifier for applications requiring high efficiency and minimal external components due to its filter-less design. Consider the fully differential input option for noisy environments like wireless handsets to maximize noise rejection. Evaluate the gain configuration needs; the default gain is 2V/V but can be adjusted using external input resistors. Ensure adequate decoupling capacitors are placed close to the VCC pin to maintain performance.

Part Context

This component belongs to Lumissil Microsystems' portfolio of high-performance audio amplifiers. It is designed as a compact solution for portable electronics where space and power efficiency are critical constraints. The device integrates advanced features typically found in larger Class-AB amplifiers into a small footprint, making it suitable for modern mobile and consumer electronic devices.

Replacement Considerations

The IS31AP2005-SLS2-TR is the MSOP-8 package variant of the same functional device. When replacing, verify that the existing PCB layout accommodates the chosen package type (DFN-8 vs. MSOP-8). Ensure that the thermal management strategy is compatible with the new package's thermal resistance characteristics.