UC3852N

Overview

The UC3852N is a high power-factor preregulator controller 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 8-pin PDIP package. It functions within an operating temperature range of -40°C to +85°C and draws a typical quiescent supply current of 400 µA.

Feature Summary

• Implements average current mode control for high power factor correction
• Integrates on-time controlled zero-current switching for reduced losses
• Includes built-in soft-start and brown-out protection circuits

Applications

• High power-factor preregulators
• Power factor correction circuits
• Switching power supplies

Procurement Notes

Verify the specific suffix against official documentation, as variations may exist. Confirm RoHS compliance status and lead times directly with the manufacturer or authorized distributors prior to ordering. Ensure the procurement channel is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this component for applications requiring high power factor correction with average current mode control. Consider the 8-pin PDIP package for through-hole assembly requirements. Evaluate the -40°C to +85°C operating temperature range against environmental conditions. Compare performance against similar models like the UC3854 if higher pin counts are needed.

Part Context

The UC3852N belongs to the UC2852/UC3852 family of power factor correction controllers from Texas Instruments. This series is widely used in offline power supplies to improve efficiency and reduce harmonic distortion. The N suffix denotes the standard ceramic DIP package variant suitable for general-purpose industrial and commercial electronics.

Replacement Considerations

Public confirmed substitutes include UC2852N and UC1852N.