UCC28056CDBVT

Overview

The UCC28056CDBVT is a six-pin high-performance power factor correction controller from Texas Instruments, housed in an SOT-23-6 surface-mount package. It operates within a temperature range of -40°C to +125°C and draws a supply current of 46 µA. The device supports CRM/DCM hybrid mode operation with integrated overheat protection and second independent output voltage protection.

Feature Summary

• Implements a hybrid transition mode (TM) and discontinuous conduction mode (DCM) approach that automatically reduces switching frequency as load decreases.
• Maintains continuous PFC operation via burst mode with soft entry and exit periods to meet stringent energy efficiency standards without disabling the PFC stage.
• Features instant-on capability to minimize external component count and eliminates the need for a secondary winding on the boost inductor for valley sync turn-on.

Applications

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

Procurement Notes

Verify the specific suffix 'VT' indicates cut-tape packaging rather than reel quantities when ordering. Confirm the operating temperature grade matches system requirements. Ensure the SOT-23-6 footprint aligns with PCB layout constraints. Validate RoHS compliance status through official documentation prior to integration.

Selection Notes

Select this component for designs requiring high power factor at light loads down to 10% while maintaining low audible noise. It is suitable for systems needing immediate startup without auxiliary converters. Consider its wide VCC range and low start-up current for efficient power management in compact form factors.

Part Context

This part belongs to the UCC28056 series of power factor correction controllers. It is designed to drive PFC power stages up to 300W while ensuring sinusoidal line input current and low distortion. The device complements LLC controllers like the UCC256301 to simplify system architecture by removing the need for auxiliary flyback converters.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing control loops before considering alternative devices.