UCC2804DTR

Overview

The UCC2804DTR is a low-power economy BiCMOS current-mode PWM controller designed for offline switcher applications. It supports Boost, Flyback, and Forward topologies with a switching frequency up to 1 MHz. The device operates within a supply voltage range of 8.3V to 12V and features a maximum duty cycle of 50%. It is housed in an 8-SOIC package and functions across a temperature range of -40°C to 85°C.

Feature Summary

• Implements current-mode pulse width modulation control for efficient power regulation.
• Supports multiple converter topologies including boost, flyback, and forward configurations.
• Features a fixed maximum duty cycle limit to ensure stable operation.

Applications

• Offline switcher designs
• Flyback converter implementations
• Forward converter circuits

Procurement Notes

Verify the specific suffix 'DTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-SOIC physical dimensions align with the target PCB footprint constraints. Ensure the operating temperature range meets the environmental requirements of the final application system.

Selection Notes

Select this component for cost-sensitive applications requiring moderate performance levels. Consider the 1 MHz switching frequency capability when evaluating passive component sizing. Evaluate the 50% duty cycle constraint against the input-to-output voltage ratio requirements of the specific power stage design.

Part Context

This part belongs to the UCC280x series of low-power controllers from Texas Instruments. It serves as an economical alternative for basic AC/DC conversion needs where high precision or advanced protection features are not critical. The series shares architectural similarities with other members while maintaining distinct pinout and functional characteristics.

Replacement Considerations

UCC2804DR