TDA749313TR

Overview

The TDA749313TR is a Class-D audio amplifier manufactured by STMicroelectronics, designed for stereo speaker applications. It operates on a single supply voltage ranging from 3V to 5.5V and delivers up to 3W per channel into a 4-ohm load. The device features a 24-pin HTSSOP package with an exposed pad for thermal management. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.05% at 0.5W output into 4 ohms. The operational temperature range spans from 0°C to 70°C.

Feature Summary

• Class-D topology for high efficiency in stereo audio amplification
• Integrated differential input stage for improved noise immunity
• Built-in protection mechanisms including short-circuit and thermal shutdown
• Supports standby mode for power conservation

Applications

• Portable audio devices requiring low-voltage operation
• Stereo speaker systems in consumer electronics
• Battery-powered audio equipment

Procurement Notes

Verify component authenticity through authorized distributors as the part status is obsolete. Confirm package integrity and pin alignment against the 24-HTSSOP specification. Check datasheet revisions for any design changes prior to integration. Ensure compliance with RoHS3 standards if required by the target market regulations.

Selection Notes

Select this component for designs requiring a compact stereo solution under 5.5V. Consider the thermal performance of the HTSSOP package for heat dissipation requirements. Evaluate the 0.05% THD+N specification against audio quality needs. Verify that the 3W per channel output meets the impedance and power demands of the connected speakers.

Part Context

This device belongs to the TDA7493 series of audio amplifiers from STMicroelectronics. It is specifically engineered for low-voltage, high-efficiency stereo applications. The series utilizes Class-D technology to minimize power consumption while maintaining audio fidelity. The TDA749313TR variant is packaged in a surface-mount HTSSOP format suitable for automated assembly.

Replacement Considerations

Public confirmed substitute: TPA2026D2YZHT (Texas Instruments). Verify pin compatibility and electrical parameters before substitution.