UC3854N-F

Overview

The UC3854N-F is a high power factor preregulator integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 14.5V to 30V and supports switching frequencies up to 200 kHz. The device is designed for through-hole installation in a 16-PDIP package, measuring 19.3mm in length, 6.35mm in width, and 4.57mm in height. It functions effectively within an operating temperature range of 0°C to +70°C.

Feature Summary

• Implements average current mode control for precise power factor correction
• Integrates zero-power detection capabilities to enhance efficiency at light loads
• Features a robust startup circuit with low initial bias current requirements

Applications

• Active power factor correction stages in AC-DC power supplies
• High-efficiency switched-mode power supply (SMPS) designs
• Compliance applications requiring strict harmonic distortion limits

Procurement Notes

Verify the specific suffix 'F' against the official Texas Instruments datasheet to confirm if it denotes a specific tape-and-reel variant or packaging distinction compared to the standard UC3854N. Ensure the component matches the required lead form and material specifications for your assembly process.

Selection Notes

Select this component when designing single-stage PFC converters using Boost topology. It is suitable for applications requiring high power factor without complex digital control loops. Consider thermal management due to the PDIP package's thermal resistance characteristics in enclosed environments.

Part Context

The UC3854 series represents a family of advanced power factor correction controllers from Texas Instruments. The UC3854N-F belongs to the standard UC3854 line, distinct from the enhanced UC3854A/B variants which offer improved performance metrics. It serves as a foundational analog solution for modern power electronics.

Replacement Considerations

UC3854N

FAQ

What control method does the UC3854N-F utilize?

It utilizes average current mode control to shape the input current waveform.

Is the UC3854N-F available in surface mount packages?

No, the UC3854N-F specifically refers to the through-hole PDIP-16 package variant.