UCC28500N

Overview

The UCC28500N is a high-power-factor preregulator controller manufactured by Texas Instruments. It operates in average current mode to achieve unity power factor and low harmonic distortion. The device integrates a PWM controller with a PFC stage, supporting switching frequencies up to 100 kHz. It features a wide supply voltage range of 9.7 V to 18 V and an operating temperature range from -40°C to +85°C. The component is housed in a 20-pin PDIP package for through-hole mounting.

Feature Summary

• Implements average current-mode control for precise input current shaping
• Integrates combined PFC and PWM controller functions for preregulator applications
• Provides built-in protection mechanisms including overvoltage and undervoltage lockout

Applications

• Universal AC-DC power supplies
• Offline switch-mode power supplies
• Power factor correction preregulators

Procurement Notes

Verify the specific suffix 'N' confirms the 20-PDIP through-hole package variant. Confirm RoHS compliance status as per the latest manufacturer documentation. Check for obsolescence notices or discontinuation notifications prior to finalizing procurement plans.

Selection Notes

Select this component for designs requiring integrated PFC and PWM control in a single IC. Ensure the application supports average current mode operation at frequencies up to 100 kHz. Verify that the system design accommodates the specified 20-pin DIP footprint and through-hole assembly requirements.

Part Context

This part belongs to the UCC2850x family of power factor correction controllers. It serves as a solution for offline power supplies needing high efficiency and low harmonic distortion. The device simplifies design by combining PFC and PWM stages into one package.

Replacement Considerations

Consult official substitution guides for compatible alternatives within the UCC2850x series or equivalent TI PFC controllers.