UCC29950DR

Overview

The UCC29950DR is a Power Factor Correction (PFC) controller from Texas Instruments, designed for continuous conduction mode (CCM) applications. It operates within a switching frequency range of 87 kHz to 109 kHz and utilizes an 8-pin SOIC package. This component serves as the primary control IC for AC/DC converters featuring main PFC stages with one isolated output.

Feature Summary

• Supports continuous conduction mode (CCM) power factor correction
• Integrated control logic for AC/DC converter topologies

Applications

• AC/DC power supplies with main PFC stage
• Systems requiring one isolated output
• Power factor correction circuits in offline SMPS

Procurement Notes

Verify the specific revision level against the manufacturer's latest documentation before integration. Confirm that the 8-pin SOIC footprint matches the target PCB layout. Ensure the design accommodates the specified 87 kHz to 109 kHz switching frequency range for proper electromagnetic interference management.

Selection Notes

Select this component for designs requiring CCM PFC control with a single isolated output topology. The fixed frequency range suits applications where switching noise must be confined between 87 kHz and 109 kHz. Evaluate thermal requirements for the SOIC-8 package based on the intended power output levels.

Part Context

This device belongs to the UCC299xx series of power management integrated circuits. It functions specifically as a PFC controller rather than a general-purpose voltage regulator or gate driver. The DR suffix indicates the tape-and-reel packaging variant of the standard UCC29950 device.

Replacement Considerations

The UCC29950D is the direct tube-packaged equivalent. Verify pinout compatibility and electrical specifications before substituting.