RT9101GQW

Overview

The RT9101GQW is a 2.65W, high-efficiency Class-D audio amplifier manufactured by Richtek USA Inc. It features low-resistance internal power MOSFETs and utilizes a filterless topology to eliminate the need for output filters, thereby reducing external component count. The device operates on a supply voltage range of 2.7V to 5.5V and delivers 1.45W of output power in certain configurations. Gain is set via external input resistors. It is housed in an 8-WDFN package with exposed pad.

Feature Summary

• High-efficiency Class-D architecture with low-resistance internal power MOSFETs
• Filterless topology eliminates output filters to reduce external components
• Adjustable gain through external input resistors

Applications

• Portable audio devices
• Mobile phones
• MP3 players

Procurement Notes

Verify the specific suffix (GQW) against the manufacturer's current datasheet to confirm pinout and thermal pad specifications. Ensure compatibility with the target PCB footprint and soldering profile. Confirm RoHS compliance status if required by local regulations. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for applications requiring high efficiency and minimal external passive components due to its filterless design. Consider the 2.7V to 5.5V supply range when designing the power system. Evaluate the thermal performance of the 8-WDFN package under maximum load conditions. Verify that the adjustable gain configuration meets the system's audio signal requirements.

Part Context

The RT9101 series belongs to Richtek's portfolio of audio amplifiers designed for portable electronics. It is part of a family of Class-D amplifiers optimized for battery-powered devices where efficiency and board space are critical constraints. The GQW variant specifies the package type and temperature rating.

Replacement Considerations

Publicly confirmed substitute part numbers were not identified in the provided source material.