UCC28061DRG4

Overview

The UCC28061DRG4 is a dual-channel interleaved 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 installation, the device utilizes a 16-SOIC package with a width of 3.90mm. It functions reliably across an extended temperature range from -40°C to 125°C and draws a startup current of 100µA.

Feature Summary

• Natural Interleaving technology synchronizes two channels as masters without slave channels to ensure strong matching and rapid response.
• Sensorless current shaping simplifies circuit board layout while enhancing overall system efficiency.
• FailSafe overvoltage protection prevents catastrophic output overvoltage conditions caused by voltage sensing faults.

Applications

• Power supplies meeting 80 PLUS and ENERGY STAR standards
• Set-top boxes and game devices
• LCD, plasma, and DLP televisions

Procurement Notes

Verify that the specific suffix DRG4 corresponds to the standard RoHS-compliant tape-and-reel packaging configuration. Confirm the 16-SOIC physical dimensions match your PCB footprint requirements. Ensure the design accommodates the specified 14V to 21V operating supply voltage range for stable controller operation.

Selection Notes

Select this component for applications requiring high-efficiency transition-mode PFC control above 100W. The Natural Interleaving feature is critical for reducing audible noise in consumer electronics. Verify compatibility with low-cost diodes and reduced EMI filter sizes compared to traditional continuous conduction mode designs.

Part Context

This part belongs to the UCC28061 series of interleaved PFC controllers. It shares core architecture with variants like the UCC28061DR but includes specific manufacturing or compliance suffixes. The series targets high-power density designs where acoustic noise immunity and light-load efficiency are primary engineering constraints.

Replacement Considerations

The NCP1631DR2G is documented as a similar alternative product. Verify functional equivalence regarding interleaving capabilities and pinout compatibility before substitution.

FAQ

How does the Natural Interleaving feature improve performance?

It synchronizes both channels as masters at the same frequency, providing inherent strong matching and faster transient response without requiring a dedicated slave channel.

What protection features are integrated into the UCC28061?

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