TDA2050V

Overview

The TDA2050V is a monolithic integrated circuit in a Pentawatt package, designed as an audio class AB amplifier. It supports supply voltages from ±4.5V to ±25V and delivers up to 35W RMS into a 4Ω load at THD=10% with ±18V supply, or 32W into an 8Ω load at THD=10% with ±22V supply. The device provides typically 50W music power into a 4Ω load over 1 second at ±22.5V. Key electrical characteristics include a maximum output peak current of 5A, open-loop voltage gain of 80dB, and a slew rate of 8V/μs.

Feature Summary

• Integrated short-circuit protection limits output transistor current to maintain safe operating area during accidental AC output to ground shorts.
• Thermal shutdown circuit reduces power dissipation and current consumption if junction temperature reaches 150°C, preventing permanent damage.
• Supports both single and split supply operations for flexible system integration.

Applications

• Hi-Fi audio amplification systems
• High-class television sets

Procurement Notes

Verify the specific ordering suffix 'V' against manufacturer documentation to confirm exact pinout and mechanical dimensions. Confirm component status, as this part may be obsolete. Ensure adequate heatsinking is provided due to thermal requirements.

Selection Notes

Select based on required output power and load impedance. Verify that the application environment allows for proper heat dissipation via an external heatsink. Ensure the input signal level matches the high open-loop gain specifications to prevent distortion.

Part Context

The TDA2050V belongs to the TDA2050 family of audio power amplifiers manufactured by STMicroelectronics. It utilizes the Pentawatt package for efficient mounting and thermal management. This series is engineered for applications requiring high output power with low harmonic and crossover distortion.

Replacement Considerations

TDA2050H is a confirmed substitute within the same product family offering identical functionality and specifications.

FAQ

What is the maximum allowable junction temperature before thermal shutdown activates?

The thermal shutdown circuit activates when the junction temperature reaches 150°C.

How does the short-circuit protection function?

It limits the current of the output transistors based on collector-emitter voltage, acting as a peak power limiter rather than simple current limiting to keep devices within their safe operating area.