UCC2972N

Overview

The UCC2972N is a synchronous rectification controller designed for high-efficiency power conversion applications. It features an integrated driver capable of sourcing and sinking peak currents to efficiently control external N-channel MOSFETs. The device operates with a wide input voltage range, supporting various transformer-coupled topologies. Key electrical characteristics include a fixed dead-time adjustment capability and a robust under-voltage lockout mechanism to ensure reliable startup and shutdown sequences. The component is housed in a standard DIP-16 package, facilitating through-hole mounting for industrial and commercial power supply designs requiring precise secondary-side rectification control.

Feature Summary

• Integrated gate driver optimized for low-loss N-channel MOSFET switching
• Adjustable dead-time control to minimize cross-conduction losses
• Wide operating input voltage range for flexible topology integration

Applications

• High-frequency flyback converters
• Forward converter secondary rectification
• Push-pull power supply stages

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-16 package variant when ordering. Ensure the supplier provides original manufacturer documentation or authorized distributor certificates to confirm authenticity. Cross-reference the date code and lot number against current production status if long-term availability is required. Check for any recent obsolescence notices from Texas Instruments, as Unitrode products are now managed under TI's portfolio.

Selection Notes

Select this component when designing synchronous rectification circuits that require precise timing control between primary and secondary switching events. Evaluate the thermal performance requirements of the application, as the controller drives external MOSFETs rather than integrating them. Consider the input voltage range compatibility with the specific transformer turns ratio and output voltage requirements of the target power supply design.

Part Context

Originally developed by Unitrode Corporation, this part was later acquired by Texas Instruments. The UCC2972 series represents a generation of controllers focused on improving efficiency in isolated DC-DC converters by replacing diodes with actively controlled MOSFETs. It remains a reference design component for engineers optimizing power density and thermal management in legacy and modern power architectures.

Replacement Considerations

Consult Texas Instruments official substitution guides for direct pin-compatible alternatives such as the UCC29730 series for enhanced integration. Verify that any substitute maintains compatible drive strength and dead-time adjustability for the existing PCB layout and MOSFET selection.