UC2855BN

Overview

The UC2855BN is a high-performance power factor correction (PFC) pre-regulator controller manufactured by Texas Instruments. It operates within a switching frequency of 500 kHz and supports an operating temperature range from -40°C to +85°C. The device is housed in a 20-pin PDIP package and draws a typical supply current of 150 µA. Designed for through-hole mounting, it functions as a dedicated PFC solution within the PMIC category.

Feature Summary

• Integrated high-performance power factor correction control architecture
• Supports zero-crossing detection for improved line current shaping
• Includes internal oscillator with programmable frequency capabilities

Applications

• High performance AC-DC pre-regulators
• Power factor correction circuits
• Universal input power supplies

Procurement Notes

Verify the specific suffix 'BN' indicates the commercial grade variant with the specified temperature range and packaging. Confirm RoHS compliance status via the official datasheet before integration. Ensure the procurement channel provides valid traceability documentation for this component type.

Selection Notes

Select this component when designing systems requiring a dedicated PFC controller with a 500 kHz switching capability. The PDIP-20 package is suitable for prototyping or applications where through-hole assembly is preferred over surface mount technology. Compare against the UC3855B series for industrial temperature variations if required.

Part Context

This part belongs to the UC2855B family of power factor correction controllers. It serves as a specialized integrated circuit for managing the power factor in AC-DC conversion stages, distinct from general PWM controllers like the UC2845 series.

Replacement Considerations

The UC3855BN is documented as an alternative version within the same product family.