TDA7490

Overview

The TDA7490 is a dual-channel Class-D audio amplifier IC manufactured by STMicroelectronics. It operates on a dual supply voltage ranging from ±10V to ±25V and is housed in a 25-Flexiwatt vertical package with through-hole mounting. The device delivers up to 50W per channel into a 16-ohm load or 25W per channel into an 8-ohm load. It supports mono or stereo output configurations and functions within an ambient temperature range of 0°C to 70°C.

Feature Summary

• Class-D topology for high efficiency
• Integrated pop-noise elimination and mute functions
• Built-in short-circuit and thermal protection mechanisms
• Standby mode capability for power management

Applications

• Audio amplification systems
• General-purpose sound reproduction equipment

Procurement Notes

Verify component authenticity and datasheet alignment before integration, as the TDA7490 is officially listed as obsolete. Confirm that the 25-Flexiwatt package dimensions match the target PCB footprint. Ensure design specifications accommodate the specified operating temperature range and supply voltage limits to maintain reliability.

Selection Notes

Select this component when a robust, through-hole mounted Class-D amplifier is required for higher power applications. It is suitable for designs needing integrated protection features without external heat sinks due to its specific package thermal characteristics. Verify compatibility with the intended dual-supply architecture and load impedance requirements.

Part Context

This part belongs to the TDA74xx series of audio amplifiers from STMicroelectronics. It represents a discrete solution compared to modern surface-mount alternatives, utilizing a specialized Flexiwatt package designed for vertical mounting. The series focuses on delivering substantial output power with built-in safety features for consumer and industrial audio electronics.

Replacement Considerations

No public confirmed substitute part numbers are available.