UCC28511DW

Overview

The UCC28511DW is a Power Factor Correction (PFC) controller manufactured by Texas Instruments, housed in an 18-SOIC package. It integrates a high-voltage startup circuit and supports average current mode control for boost PFC applications. The device operates with a switching frequency up to 200 kHz and includes features such as cycle-by-cycle peak current limiting, programmable soft-start, and undervoltage lockout. It is designed for universal AC input voltages and offers comprehensive protection mechanisms including overvoltage and thermal shutdown.

Feature Summary

• Integrates a high-voltage startup circuit to eliminate external start-up resistors
• Supports average current mode control for improved power factor performance
• Includes built-in cycle-by-cycle peak current limiting for robust operation
• Features programmable soft-start to limit inrush current during power-up

Applications

• Universal input offline power supplies
• Power factor correction stages in AC-DC converters
• Industrial power supply systems
• Telecommunications power equipment

Procurement Notes

Verify the exact suffix 'DW' corresponds to the 18-SOIC package and commercial temperature range. Confirm RoHS compliance status through the manufacturer's latest documentation. Ensure ordering quantities align with tube packaging specifications. Cross-reference the datasheet revision date to guarantee compatibility with design requirements.

Selection Notes

Select this component for designs requiring integrated high-voltage startup and average current mode PFC control. Evaluate the 18-SOIC package size against PCB layout constraints. Consider the 200 kHz maximum switching frequency when designing magnetic components. Verify that the operating temperature range meets the specific application environment needs.

Part Context

This part belongs to the UCC2851x family of PFC controllers from Texas Instruments. It is designed to simplify the implementation of high-performance power factor correction circuits. The integration of startup circuitry reduces component count compared to discrete solutions. It serves as a key component in modern efficient power conversion systems.

Replacement Considerations

Check for pin-compatible alternatives within the UCC2851x series. Verify electrical parameter equivalence for startup voltage and switching frequency. Ensure package dimensions match the existing footprint if direct replacement is required.