UCC28061DR

Overview

The UCC28061DR 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 utilizes a 16-SOIC package with a width of 3.90mm and functions across an operating temperature range of -40°C to 125°C. Designed for high-efficiency applications, it features a startup current of 100µA and integrates comprehensive 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 light-load efficiency.
• Sensorless current shaping simplifies circuit board layout while enhancing overall system efficiency and design flexibility compared to traditional continuous conduction mode controllers.
• FailSafe overvoltage protection prevents catastrophic equipment failure caused by intermediate voltage shorts resulting from voltage sensing faults.
• Integrated surge-safe current limiting protects MOSFETs during inrush events and eliminates reverse recovery issues in output rectifiers.

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 ordering suffix to ensure the correct packaging configuration matches your assembly requirements. Confirm that the component meets RoHS3 specifications and EAR99 export classification standards relevant to your region. Ensure compatibility with the 16-SOIC footprint dimensions during PCB layout validation.

Selection Notes

Select this controller for designs requiring high efficiency at light loads and reduced audible noise in consumer electronics. The transition-mode architecture allows for lower component costs and smaller EMI filters compared to continuous conduction mode solutions. Evaluate the need for dual-channel interleaving to minimize input filter size and output capacitor ripple currents.

Part Context

This component belongs to the UCC28061 series of PFC controllers designed to extend the benefits of transition-mode operation to higher power ratings. It addresses the limitations of single-phase continuous conduction mode controllers by offering superior transient response and improved acoustic performance through natural interleaving techniques.

Replacement Considerations

NCP1631DR2G is listed as a similar alternative part number.