UCC28061D

Overview

The UCC28061D 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 a switching frequency of 500kHz. The device is housed in a 16-SOIC package with a width of 3.90mm. It functions across an operating temperature range of -40°C to 125°C and draws a startup current of 100µA. Designed for power levels between 100W and 800W, it features integrated system-level protections including input undervoltage, output overvoltage, open-loop detection, overload protection, soft start, phase fault detection, and thermal shutdown.

Feature Summary

• Natural Interleaving technology enables two-channel operation without a dedicated slave channel, synchronizing both channels to the same frequency for improved audio noise immunity and efficient light-load performance.
• Sensorless current shaping simplifies printed circuit board layout while enhancing overall system efficiency and design flexibility compared to traditional continuous conduction mode controllers.
• Dual-channel FailSafe overvoltage protection prevents catastrophic equipment failure caused by voltage sensing faults or intermediate voltage shorts during operation.

Applications

• Power supplies compliant with 80 PLUS and ENERGY STAR standards
• Set-top boxes and digital-to-analog converters
• LCD, Plasma, and DLP televisions
• Home audio systems

Procurement Notes

Verify the specific suffix 'D' indicates tube packaging rather than tape-and-reel configurations when sourcing components. Confirm that the part number corresponds to the standard commercial grade variant rather than automotive qualified versions like the QDRQ1. Ensure compatibility with 16-SOIC footprints during PCB design validation. Cross-reference manufacturer documentation for any recent lifecycle status changes or recommended alternative packages.

Selection Notes

Select this component for designs requiring high efficiency at light loads without complex control loops. The natural interleaving feature reduces input filter size and eliminates output rectifier reverse recovery events. It is suitable for applications needing robust protection against phase faults and thermal stress. Consider the 500kHz switching frequency when designing magnetic components and ensuring electromagnetic interference compliance within the target enclosure.

Part Context

This device belongs to the UCC28061 series of transition-mode PFC controllers. It shares architectural similarities with other TI interleaved PFC solutions but distinguishes itself through specific natural interleaving implementation and enhanced audible noise immunity. The SOIC-16 package provides a compact footprint suitable for dense consumer electronics layouts while maintaining adequate thermal dissipation characteristics for mid-power applications.

Replacement Considerations

The UCC28061DG4 is a lead-free version of the same functional device. Verify pinout compatibility if substituting with other interleaved PFC controllers from different manufacturers. Check datasheet specifications for gate drive current capabilities and operating voltage ranges to ensure seamless integration into existing power stages.