UCC38050P

Overview

The UCC38050P 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 input supply voltages between 12 V and 18 V. The device features undervoltage lockout thresholds at 15.6 V and 9.7 V, ensuring stable startup and shutdown behavior. Designed for through-hole mounting, it utilizes an 8-pin PDIP package. The controller draws a low startup current of 75 µA, facilitating efficient energy usage during initialization phases in power conversion applications.

Feature Summary

• Implements discontinuous transition mode control to optimize power factor correction performance
• Complies with IEC61000-3-2 harmonic current standards for regulatory adherence
• Integrates precise undervoltage lockout circuitry for reliable power sequencing

Applications

• Electronic ballasts requiring downstream PWM conversion
• Power factor correction stages in AC-DC power supplies
• Discontinuous conduction mode power management systems

Procurement Notes

Verify component authenticity due to end-of-life status. Confirm package integrity as the unit uses an 8-pin PDIP housing. Check datasheet revisions for any copper bond wire updates. Ensure compatibility with existing PCB footprints before integration into new designs.

Selection Notes

Select this component for applications requiring transition mode PFC without downstream regulation. Evaluate thermal requirements for the PDIP package. Consider the 200 kHz switching frequency for magnetics design. Verify input voltage range matches the 12 V to 18 V specification.

Part Context

This part belongs to the UCC3805x family of transition mode PFC controllers from Texas Instruments. It shares functional similarities with the UCC38051P but differs in specific parameter configurations. The series targets cost-sensitive applications needing compliance with harmonic emission standards.

Replacement Considerations

Public confirmed substitute: UCC38051P.