UCC28061DG4

Overview

The UCC28061DG4 is a Natural Interleaving Transition-Mode Power Factor Correction (PFC) controller manufactured by Texas Instruments. It operates within a supply voltage range of 14V to 21V and supports switching frequencies up to 500kHz. Designed for surface-mount applications, it utilizes a 16-SOIC package with a width of 3.90mm. The device functions across an extended temperature range from -40°C to +125°C. It features integrated gate drivers capable of sourcing 1A and sinking 1.8A, facilitating efficient control in high-power PFC systems.

Feature Summary

• Natural Interleaving technology synchronizes two channels as masters without slave channels, ensuring strong matching and rapid response while maintaining transition-mode operation.
• FailSafe overvoltage protection prevents catastrophic output overvoltage conditions caused by voltage sensing faults or short circuits to intermediate voltages.
• Sensorless current shaping simplifies printed circuit board layout and enhances system efficiency by eliminating the need for external current sensors.

Applications

• Power supplies rated between 100W and 800W
• Set-top boxes and digital-to-analog converters
• LCD, plasma, and DLP televisions

Procurement Notes

Verify the specific suffix 'DG4' indicates lead-free construction and RoHS compliance when ordering. Confirm that the 16-SOIC package dimensions match your PCB footprint requirements. Ensure the operating environment stays within the specified -40°C to +125°C thermal limits. Check for any recent product change notices regarding pinout or electrical characteristics before finalizing designs.

Selection Notes

Select this component for applications requiring improved audible noise immunity compared to standard transition-mode controllers. It is suitable for designs aiming to meet 80 PLUS and ENERGY STAR efficiency standards. Consider its sensorless architecture if minimizing bill-of-materials complexity is a priority. Evaluate the 500kHz switching capability against EMI filter size constraints.

Part Context

This part belongs to the UCC28061 family of interleaved PFC controllers. It shares core functionality with variants like UCC28061DR but differs in packaging and environmental specifications. The DG4 suffix typically denotes a lead-free, RoHS-compliant version housed in a tube, distinguishing it from tape-and-reel alternatives.

Replacement Considerations

UCC28061DR serves as a functional equivalent with identical electrical characteristics but utilizes tape-and-reel packaging instead of tubes. Verify package compatibility and handling requirements when substituting between these variants.

FAQ

How does Natural Interleaving improve performance?

It allows both channels to operate as masters synchronized to the same frequency, providing inherent strong matching and faster transient response while ensuring each channel runs in transition mode.

What protection features are included?

The device includes input undervoltage lockout, output overvoltage protection with FailSafe capability, open-loop detection, overload protection, soft start, phase fault detection, and thermal shutdown.