UCC28056ADBVR

Overview

The UCC28056ADBVR is a six-pin high-performance power factor correction controller from Texas Instruments, housed in an SOT-23-6 package. It operates within a temperature range of -40°C to +125°C and supports surface-mount installation. The device utilizes a hybrid control mode that transitions from Transition Mode (TM) at full load to Discontinuous Conduction Mode (DCM) as the load decreases, automatically reducing switching frequency. This architecture enables compliance with strict energy standards such as EuP Lot 6 Level 2 and DOE Level VI without disabling the PFC stage.

Feature Summary

• Implements a hybrid CrM/DCM control method that maintains continuous PFC operation while optimizing efficiency across varying load conditions.
• Features integrated burst mode with soft entry and exit periods to minimize audible noise and reduce input current distortion at light loads.
• Includes enhanced error amplifier for rapid load step response and valley synchronization capability without requiring secondary boost inductor windings.

Applications

• Desktop computers
• Digital televisions
• Gaming consoles
• Set-top boxes
• Entry-level servers and network servers

Procurement Notes

Verify the specific suffix 'ADBVR' corresponds to the SOT-23-6 package and reel/cut-tape distribution format. Confirm RoHS compliance status through official documentation. Ensure the operating voltage range of 8.5V to 34V aligns with system requirements. Cross-reference the manufacturer part number against authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for applications requiring high power factor correction performance in compact form factors. The low start-up current consumption and wide VCC range facilitate efficient design. Consider compatibility with LLC controllers like the UCC256301 for complete power supply solutions. Evaluate thermal management needs given the maximum operating temperature rating.

Part Context

This device belongs to the UCC28056 series of power factor correction controllers designed for AC-DC conversion stages. It serves as a key component in modern power supplies aiming to meet international energy efficiency regulations. The integration of advanced control features allows designers to achieve high performance with minimal external component count.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.