TDA7490L

Overview

The TDA7490L is a dual audio Class-D amplifier designed for high-efficiency applications in TV and home stereo sets. It delivers 20W + 20W output power at RL = 8Ω/4Ω with THD = 10%. The device supports split supply operation within a wide voltage range of ±10V to ±25V, as well as single supply configurations. Key electrical characteristics include an efficiency of 86% at full load, a closed-loop gain of 30 dB, and a switching frequency range of 100 kHz to 230 kHz. It features short-circuit protection across the load and thermal overload protection.

Feature Summary

• High-efficiency Class-D architecture optimized for low power dissipation
• Supports both split and single supply voltage operations
• Integrated turn-on/off pop-free mute and standby functions
• Includes short-circuit and thermal overload protection mechanisms

Applications

• Television sets
• Home stereo systems
• High-efficiency audio amplification circuits

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity upon receipt, as the Flexiwatt 25 housing requires careful handling during installation. Review the official datasheet for absolute maximum ratings and thermal management guidelines before integration into final designs.

Selection Notes

Select this component for designs requiring dual-channel amplification with high efficiency. Ensure the power supply matches the ±10V to ±25V operating range. Verify that the application circuit includes appropriate LC filtering components as specified in the datasheet to maintain signal quality and meet electromagnetic compatibility requirements.

Part Context

The TDA7490L belongs to STMicroelectronics' line of Class-D audio amplifiers. It is housed in a Flexiwatt 25 vertical package, which facilitates heat dissipation without requiring a separate heatsink in many applications. This packaging allows for compact board layouts while maintaining robust thermal performance under continuous operation.

Replacement Considerations

Consult official documentation for pin-compatible alternatives. Verify that any substitute part meets the same voltage, power, and thermal specifications required by the existing design constraints.