UCC38050DR

Overview

The UCC38050DR is a transition mode power factor correction (PFC) controller manufactured by Texas Instruments. It operates with a fixed switching frequency of 200 kHz and supports supply voltages ranging from 12 V to 18 V. The device draws a typical operating supply current of 75 µA. It is housed in an 8-pin SOIC package designed for surface mount technology. The component functions as a single-output transistor driver intended for positive output configurations.

Feature Summary

• Implements transition mode control architecture for power factor correction applications
• Features low operating supply current to minimize standby power consumption
• Provides integrated oscillator for fixed frequency operation

Applications

• Power factor correction stages in AC-DC power supplies
• Transition mode PFC controllers for consumer electronics
• Industrial power supply front-end circuits

Procurement Notes

Verify the specific suffix DR against official Texas Instruments documentation to confirm the tape and reel packaging configuration. Ensure compatibility with the target PCB footprint for the SOIC-8 package. Confirm RoHS compliance status through the manufacturer's latest datasheet or environmental information page, as regulatory requirements may vary by production batch.

Selection Notes

Select this component when designing transition mode PFC systems requiring a fixed 200 kHz switching frequency. Consider the 75 µA supply current for efficiency optimization in low-power applications. Validate that the 12 V to 18 V supply range aligns with the auxiliary winding design of the target transformer. Compare against other UCC28050 series variants if different packaging or temperature ranges are required.

Part Context

This part belongs to the UCC28050/51 family of transition mode PFC controllers. It shares functional similarities with the UCC38051 but differs in packaging and specific electrical characteristics. The UCC38050DR is distinct from buck or flyback controllers like the UCC38C52, focusing specifically on power factor correction rather than general DC-DC conversion topologies.

FAQ

What control mode does the UCC38050DR utilize?

It utilizes transition mode control for power factor correction.

Is the switching frequency adjustable?

No, the UCC38050DR operates at a fixed switching frequency of 200 kHz.