UCC2804DR81221G4

Overview

The UCC2804DR81221G4 is a pulse-width modulation (PWM) controller IC designed for offline switch-mode power supply applications. Manufactured by Texas Instruments, this device supports multiple converter topologies including boost, flyback, and forward configurations. It operates with a switching frequency capability of up to 1 MHz and is housed in an 8-SOIC package. The component integrates current limiting fault protection features to ensure reliable operation within offline and DC-to-DC converter systems.

Feature Summary

• Supports multiple converter topologies including boost, flyback, and forward architectures
• Integrates current limiting fault protection mechanisms
• Capable of operating at switching frequencies up to 1 MHz

Applications

• Offline switch-mode power supplies
• Boost converter designs
• Flyback converter implementations
• Forward converter circuits

Procurement Notes

Verify the specific suffix DR81221G4 against official Texas Instruments documentation to confirm exact manufacturing lot details and compliance status. Ensure that the 8-SOIC package dimensions match your PCB footprint requirements. Confirm availability status as production data may indicate end-of-life or substitution recommendations for this specific part number variant.

Selection Notes

Select this component when designing offline power supplies requiring support for boost, flyback, or forward topologies. Consider the 1 MHz maximum switching frequency for size optimization. Verify that the 8-SOIC package fits the assembly constraints. Ensure the design accommodates the integrated current limiting protection features provided by the controller architecture.

Part Context

This component belongs to the UCC280x series of PWM controllers from Texas Instruments. These devices are engineered for general-purpose offline power conversion applications. The series provides flexible topology support and robust protection features suitable for various industrial and consumer power supply designs requiring efficient voltage regulation.

Replacement Considerations

Public sources indicate that the UCC2804DR81221G4 is no longer manufactured. Review official Texas Instruments documentation for confirmed substitute part numbers. Do not assume functional equivalence without verifying pinout compatibility and electrical specifications against recommended replacements.