UCC28500DWTR

Overview

The UCC28500DWTR is a Texas Instruments average current mode Power Factor Correction (PFC) controller designed for high-performance pre-regulators. It operates within a switching frequency range of 80 kHz to 120 kHz and supports supply voltages from 9.7 V to 18 V. The device is housed in a 20-SOIC package with an operating temperature range of -40°C to +85°C. It features a low startup current of 150 µA and includes integrated protection mechanisms such as cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.

Feature Summary

• Implements average current mode control for precise power factor correction and low harmonic distortion
• Integrates comprehensive protection features including cycle-by-cycle current limiting and thermal shutdown
• Supports flexible operation across a wide input voltage range suitable for universal AC inputs

Applications

• High-performance power factor correction pre-regulators
• Universal AC-DC power supplies
• Computer and peripheral power supplies

Procurement Notes

Verify the specific suffix 'DWTR' indicates the tape-and-reel packaging variant distinct from the tube-packaged 'DW'. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the ordering part number matches the required package type and reel quantity specifications defined in the official datasheet.

Selection Notes

Select this component for designs requiring average current mode PFC control with integrated protections. It is suitable for applications needing operation up to 120 kHz. Compare against the UC2854 series if different pinouts or specific feature sets are required. Verify that the 20-SOIC package dimensions fit the PCB layout constraints.

Part Context

The UCC28500 belongs to the UCC28500/03 family of PFC controllers from Texas Instruments. These devices are engineered for high-efficiency power conversion systems. The DWTR suffix specifically denotes the reel-packaged version of the SOIC-20 device, facilitating automated surface-mount assembly processes.

Replacement Considerations

The UCC28512DWR is listed by distributors as a manufacturer-recommended alternative. Verify functional compatibility and pinout alignment before substitution.