TPA731D

Overview

The TPA731D is a 700-mW mono analog input Class-AB audio amplifier featuring differential inputs. It operates over a supply range of 2.5 V to 5.5 V, with full specifications provided for 5-V and 3.3-V operation. The device includes an active high shutdown feature and integrates on-board temperature sensing capabilities. It is housed in an 8-pin SOIC (D) package and functions within a temperature range of -40°C to +85°C. Key electrical parameters include a gain bandwidth product of 1.4 MHz and an operating supply current of 1.55 mA.

Feature Summary

• Supports differential input configurations for improved noise rejection
• Integrates short-circuit and thermal protection mechanisms
• Includes active high shutdown functionality for power management

Applications

• Low-voltage portable audio systems
• Mono audio output stages
• Battery-powered consumer electronics

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin alignment against the 8-pin SOIC specification. Review datasheet revisions for any historical updates regarding thermal or electrical characteristics prior to integration into final designs.

Selection Notes

Select this component for single-channel applications requiring low voltage operation between 2.5 V and 5.5 V. The differential input capability makes it suitable for environments where common-mode noise reduction is critical. Ensure the design accommodates the specified 1.55 mA quiescent current and thermal constraints within the -40°C to +85°C operating range.

Part Context

The TPA731D belongs to Texas Instruments' line of low-voltage audio power amplifiers. It is designed for efficiency and compactness in portable devices. The D suffix denotes the SOIC-8 package variant. This specific part number represents a discontinued product scheduled for obsolescence by the manufacturer.

Replacement Considerations

This component is scheduled for obsolescence and will be discontinued by the manufacturer. Designers should identify alternative audio amplifiers from current portfolios that match the required 700-mW output, differential input configuration, and SOIC-8 packaging constraints.