UCC28501DWTR

Overview

The UCC28501DWTR is a BiCMOS Power Factor Correction (PFC) and PWM combination controller manufactured by Texas Instruments. It integrates average current-mode control for PFC and voltage-mode control for the post-regulator within a single package. The device operates with a maximum switching frequency of 120 kHz and provides a peak output drive current of 1.2 A. It is housed in a 20-pin SOIC package and supports surface-mount installation. The component functions as a complete power management solution for AC-DC converters requiring high efficiency and low harmonic distortion.

Feature Summary

• Integrates average current-mode PFC control with voltage-mode PWM regulation for the post-regulator stage
• Provides high-current gate drive capability suitable for driving external power switches
• Supports standard boost topology for power factor correction applications

Applications

• AC-DC power supplies with integrated power factor correction
• Universal input offline power conversion systems
• High-efficiency flyback or forward converters with active PFC

Procurement Notes

Verify the specific suffix 'DWTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 20-pin SOIC footprint matches the target PCB design guidelines. Ensure compatibility with the intended thermal management strategy, as the device dissipates heat during operation. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or pin configurations before finalizing procurement specifications.

Selection Notes

Select this component when a single IC solution is preferred for combining PFC and secondary-side regulation control. It is suitable for designs targeting moderate power levels where integration reduces component count. Consider the 120 kHz switching frequency limit when designing magnetic components. Evaluate the need for BiCMOS technology benefits regarding noise immunity and drive strength compared to simpler CMOS alternatives in noisy industrial environments.

Part Context

This part belongs to the UCC2850x family of BiCMOS PFC/PWM combination controllers from Texas Instruments. These devices are designed to simplify the design of high-performance AC-DC power supplies by integrating two distinct control loops into one package. The family typically targets universal input applications, offering a compact alternative to discrete PFC and PWM controller combinations.

Replacement Considerations

Direct replacements may include other BiCMOS PFC/PWM combo controllers from Texas Instruments such as the UCC28503 series, provided pinouts and electrical characteristics align. Verify functional equivalence regarding control loop stability and drive capabilities before substituting.