TDA2040V

Overview

The TDA2040V is a monolithic integrated circuit in a Pentawatt package, designed for use as an audio class AB amplifier. It typically provides 22W output power at Vs = 32V/4Ω with 0.5% distortion. The device features high output current capability and very low harmonic and cross-over distortion. Electrical characteristics include a supply voltage range of ±2.5V to ±20V, input bias current of 1μA typical, and closed loop voltage gain of 30dB. Thermal shut-down activates at 145°C junction temperature.

Feature Summary

• Patented short circuit protection system that automatically limits dissipated power to keep output transistors within their safe operating area
• Integrated thermal shut-down system for enhanced reliability under extreme conditions
• Very low harmonic and cross-over distortion performance suitable for high-fidelity applications

Applications

• Hi-Fi audio power amplification systems
• High-end television sets requiring high-quality sound reproduction
• Multiway loudspeaker systems utilizing active crossovers
• Active boxes and subwoofer/midrange/tweeter solutions

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific Pentawatt-5 package variant matches design requirements. Check RoHS compliance status against current environmental regulations. Ensure proper thermal management infrastructure is planned given the 3°C/W junction-to-case resistance specification.

Selection Notes

Evaluate supply voltage constraints against the ±2.5V to ±20V operational range. Consider thermal dissipation requirements based on expected output power levels and ambient temperatures. Assess load impedance compatibility, noting optimal performance at 4Ω or 8Ω resistive loads. Verify PCB layout capabilities to support the required ground decoupling and heat sinking strategies outlined in application notes.

Part Context

Part of the TDA2040 series of Class AB audio power amplifiers manufactured by STMicroelectronics. Designed specifically for high-power audio applications where low distortion and robust protection are critical. Shares architectural similarities with other devices in the family but offers distinct power handling capabilities within the Pentawatt package format.

Replacement Considerations

TDA2050 serves as a higher-power alternative within the same product family. Both utilize the Pentawatt package and Class AB architecture. Verify pin compatibility and thermal requirements when substituting, as the TDA2050 delivers up to 35W compared to the TDA2040's 22W typical output.

FAQ

What is the mechanism behind the short circuit protection?

The TDA2040 incorporates a patented system that automatically limits dissipated power to maintain output transistors within their safe operating area during fault conditions.

How does the device handle thermal overload?

An integrated thermal shut-down system activates when the junction temperature reaches 145°C, protecting the internal circuitry from damage due to excessive heat.