UCC28051P

Overview

The UCC28051P is a power factor correction controller from Texas Instruments, designed for continuous conduction mode (CCM) boost PFC applications. It operates within an input voltage range of 85 VAC to 265 VAC and supports output voltages up to 400 VDC. The device integrates a precision analog multiplier, a high-bandwidth transconductance error amplifier, and a current sense amplifier. Key electrical parameters include a switching frequency adjustable via an external resistor, a maximum duty cycle of approximately 50%, and an operating temperature range from -40°C to +85°C. It is housed in an 8-pin PDIP package.

Feature Summary

• Integrates a precision analog multiplier for universal AC line operation
• Features a high-bandwidth transconductance error amplifier for fast transient response
• Includes a built-in current sense amplifier with threshold adjustment
• Provides comprehensive protection against overvoltage, undervoltage, and thermal faults

Applications

• Continuous conduction mode (CCM) power factor correction front ends
• Universal AC-DC power supplies
• Computer and telecom power systems
• Industrial power supplies

Procurement Notes

Verify the specific suffix 'P' indicates the PDIP package variant when ordering. Confirm RoHS compliance status through the manufacturer's official documentation or distributor specifications prior to procurement. Ensure the design accounts for the thermal characteristics associated with the through-hole package in the final assembly.

Selection Notes

Select this component for designs requiring CCM PFC topology with universal AC input compatibility. It is suitable for applications needing integrated multiplier functionality without external discrete components. Consider the PDIP package for prototyping or applications where through-hole mounting is preferred over surface mount technology.

Part Context

The UCC28051 belongs to the UCC280x series of power factor correction controllers by Texas Instruments. This series is widely used in high-performance AC-DC conversion systems. The UCC28051 specifically targets CCM applications, distinguishing it from other variants that may support discontinuous or boundary conduction modes.

Replacement Considerations

Direct replacements should be sought within the UCC280x family, such as the UCC28050 or UCC28056, depending on the required conduction mode and pinout compatibility. Verify functional equivalence and package dimensions before substitution.