TDA1905

Overview

The TDA1905 is a monolithic integrated circuit power amplifier designed for low-frequency audio applications in radio and TV sets. It operates within a supply voltage range of 4V to 30V and delivers up to 5W output power into 4Ω loads at 14V. The device features a muting facility, protection against chip over-temperature, very low noise, high supply voltage rejection, and low switch-on noise. It is housed in a POWERDIP (8+8) package with a thermal resistance of 15°C/W junction-to-pins.

Feature Summary

• Integrated muting function for temporary inhibition of the output signal during switching or tuning events
• Built-in thermal limiting circuit that reduces power dissipation if junction temperature reaches 150°C
• High supply voltage rejection capability to minimize ripple effects on audio quality
• Low switch-on noise and very low input noise characteristics

Applications

• Radio sets
• TV sets
• Low frequency power amplification

Procurement Notes

Verify the specific ordering number matches the required configuration. Confirm the package type is POWERDIP (8+8). Ensure the application environment stays within the specified supply voltage range of 4V to 30V. Check thermal management requirements against the maximum allowable power dissipation curves provided in the datasheet.

Selection Notes

Select this component for applications requiring a simple, cost-effective audio amplifier with muting capabilities. Consider the 16-pin POWERDIP package for assembly ease and space savings. Evaluate the need for external heatsinking based on the ambient temperature and desired power output levels. Ensure the load impedance matches the design specifications for optimal performance.

Part Context

The TDA1905 belongs to STMicroelectronics' family of audio power amplifiers. It is specifically engineered for consumer electronics like radios and televisions where low noise and reliable operation are critical. The device integrates advanced protection features to ensure robustness in various operating conditions.

Replacement Considerations

No public confirmed substitute part numbers are available in the source material.