UCC2804DTR/81221

Overview

The UCC2804DTR is an offline PWM controller from Texas Instruments designed for high-frequency switching applications. It supports Boost, Flyback, and Forward topologies with a maximum switching frequency of 1 MHz. The device operates within a supply voltage range of 8.3V to 12V and features a maximum duty cycle of 50%. It includes integrated soft-start and adjustable current limiting capabilities. The component is housed in an 8-SOIC package and is rated for operation across a temperature range of -40°C to 125°C.

Feature Summary

• Supports multiple converter topologies including Boost, Flyback, and Forward configurations
• Integrated adjustable current limit circuitry for transformer protection
• Built-in soft-start mechanism to minimize inrush current during startup

Applications

• High-density AC/DC power supplies
• Flyback converter designs
• Forward converter architectures

Procurement Notes

Verify the specific suffix against official documentation to confirm exact packaging and tape specifications. Ensure the ordering part number matches the required temperature grade and package variant. Confirm RoHS compliance status through the manufacturer's datasheet before finalizing procurement orders.

Selection Notes

Select this controller for designs requiring a 1 MHz switching frequency and a 50% maximum duty cycle. It is suitable for applications needing integrated current limiting and soft-start functionality without external components. Verify that the input voltage range aligns with the 8.3V to 12V operating specification.

Part Context

This component belongs to the UCC280x series of PWM controllers from Texas Instruments. These devices are engineered for cost-effective and compact power supply solutions. The series offers various pinouts and feature sets to accommodate different topology requirements while maintaining high efficiency and reliability standards.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin replacements within the UCC280x family. Verify electrical parameters such as switching frequency and supply voltage ranges when considering alternative models.