UCC2891DR

DC DC Switching Controllers Overview

The UCC2891DR is a current-mode active clamp flyback controller manufactured by Texas Instruments. It supports Flyback and Forward topologies with a maximum switching frequency of 1 MHz. The device features a maximum duty cycle of 73% and provides an output drive current of 2.5 A. It operates within a supply voltage range of 9 V to 36 V, with a typical operating voltage of 12 V. The component functions reliably across an industrial temperature range from -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Integrates current-mode control architecture for active clamp flyback applications
• Provides high-current gate drive capability up to 2.5 A for efficient power switching
• Supports both Flyback and Forward converter topologies for versatile design options

DC DC Switching Controllers Applications

• Active clamp flyback power supplies
• Forward converter designs
• Offline AC/DC conversion systems
• General purpose power management ICs

DC DC Switching Controllers Procurement Notes

Verify the specific package variant against the datasheet, as the DR suffix typically denotes SOIC-Narrow-16 packaging. Confirm that the intended application aligns with the specified 1 MHz switching frequency limit and 2.5 A output current capabilities. Ensure thermal management strategies account for the +85°C maximum operating temperature rating during system integration and validation processes.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring integrated active clamp control in Flyback or Forward topologies. The 1 MHz switching frequency allows for reduced magnetic component size compared to lower-frequency alternatives. The 2.5 A drive current supports direct driving of power MOSFETs without additional buffer stages. Consider the SOIC-Narrow-16 package constraints for PCB layout optimization.

DC DC Switching Controllers Part Context

The UCC2891 belongs to the UCC2891 series of switch controllers from Texas Instruments. This series focuses on high-efficiency power conversion solutions using active clamp techniques. The device is categorized under PMIC - Power Management ICs, specifically designed for offline switching applications requiring precise current-mode regulation and robust gate drive performance.

DC DC Switching Controllers Replacement Considerations

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