UCC38050D

Overview

The UCC38050D is a transition mode power factor correction (PFC) controller manufactured by Texas Instruments. It operates with a fixed switching frequency of 200 kHz and features undervoltage lockout thresholds of 15.6 V and 9.7 V. The device is housed in an 8-SOIC package and supports a maximum duty cycle of 49%. It is designed for applications requiring IEC61000-3-2 compliance and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Transition mode PFC control architecture
• IEC61000-3-2 harmonic current compliance
• Integrated undervoltage lockout protection

Applications

• Power factor correction stages in AC-DC converters
• Compliance with IEC61000-3-2 Class C/D equipment standards
• High-efficiency power supply designs

Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 package variant. Confirm the operating temperature range meets system requirements, as this part supports -40°C to 85°C. Ensure design compatibility with transition mode PFC topologies. Check for end-of-life status or alternative recommendations from the manufacturer if long-term availability is critical.

Selection Notes

Select this component for designs requiring transition mode PFC with strict harmonic current limits. It is suitable for applications needing integrated UVLO and high efficiency without complex external compensation. Consider thermal performance in the SOIC-8 package when determining heat dissipation needs for the target power level.

Part Context

The UCC38050D belongs to Texas Instruments' family of advanced PFC controllers. It combines transition mode operation with robust protection features. This series targets modern power supplies that must meet international electromagnetic compatibility standards while maintaining high power factor performance.

Replacement Considerations

Check for direct pin-compatible alternatives such as the UCC28050D if different packaging or extended temperature ranges are required. Verify functional equivalence regarding switching frequency and UVLO thresholds before substitution.