UCC28056ADBVT

Overview

The UCC28056ADBVT is a six-pin high-performance Power Factor Correction (PFC) controller from Texas Instruments, housed in an SOT-23 package. It implements a hybrid control mode that operates in Transition Mode (CrM/TM) at full load and transitions to Discontinuous Conduction Mode (DCM) as the load decreases, automatically reducing switching frequency. The device supports a wide VCC operating range of 8.5V to 34V and features low startup current consumption below 46µA. It includes integrated protections such as over-temperature shutdown,逐周期限流, and independent output voltage protection.

Feature Summary

• Hybrid CrM/DCM operation for optimized efficiency across varying loads
• Burst mode capability without disabling PFC for strict energy standards compliance
• Integrated thermal protection and cycle-by-cycle current limiting
• Low quiescent current with wide supply voltage tolerance

Applications

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

Procurement Notes

Verify the suffix 'VT' indicates tape-and-reel packaging distinct from the 'R' variant. Confirm RoHS compliance status via the official datasheet. Ensure the ordering part number matches the specific package and reel quantity requirements for your assembly line. Cross-reference the manufacturer's latest product change notification for any pinout or electrical specification updates.

Selection Notes

Select this component for designs requiring high power factor correction with minimal external components. The hybrid control strategy reduces audible noise and improves light-load efficiency. Suitable for applications needing compliance with EuP Lot 6, CoC V5, and DOE Level VI standards. Consider the SOT-23 package constraints for thermal management in compact form factors.

Part Context

Part of the UCC28056 series designed for high-performance PFC applications. It complements other controllers like the UCC256301 LLC controller to enable complete power solutions without auxiliary flyback converters. The device targets consumer electronics and IT equipment where size, efficiency, and regulatory compliance are critical design drivers.

Replacement Considerations

Check for direct substitutes within the UCC2805x family. Verify pin compatibility and electrical parameters against legacy PFC controllers. Ensure alternative devices support the required hybrid CrM/DCM transition behavior and meet the same thermal and regulatory standards.