UCC3809DTR-1

AC DC Converters, Offline Switchers Overview

The UCC3809DTR-1 is an economy primary side controller from Texas Instruments, designed for switching power supply applications. It supports Boost, Buck, Flyback, and Forward topologies with a fixed switching frequency of 1 MHz. The device features a maximum duty cycle of 70% and provides a single output capable of sourcing up to 800 mA at 10 V. It operates within a commercial temperature range of 0°C to +70°C and is housed in an SOIC-8 surface-mount package.

AC DC Converters, Offline Switchers Feature Summary

• Supports multiple converter topologies including Boost, Buck, Flyback, and Forward configurations.
• Integrates primary side control capabilities for simplified design without optocouplers.
• Features high-frequency operation at 1 MHz to reduce passive component size.

AC DC Converters, Offline Switchers Applications

• Primary side regulated AC/DC converters
• Flyback power supplies
• Forward converter designs
• Buck and Boost DC/DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'DTR-1' against the official Texas Instruments datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the SOIC-8 package dimensions align with your PCB footprint. Confirm moisture sensitivity level handling procedures are followed during assembly to prevent damage.

AC DC Converters, Offline Switchers Selection Notes

Select this component when a cost-effective solution for primary side regulation is required. The 1 MHz switching frequency allows for smaller magnetics compared to lower frequency alternatives. Verify that the 800 mA output drive current meets the gate charge requirements of the external MOSFETs in your specific topology application.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC3809 series of economy primary side controllers. It shares functional similarities with other members like the UCC3809D-1 but differs in packaging and reel specifications. The DTR suffix indicates tape and reel packaging, distinguishing it from tube-packaged variants.

AC DC Converters, Offline Switchers Replacement Considerations

The UCC3809D-1 is a related variant in the same family, typically differing in packaging (tube vs. reel). Verify compatibility before substitution as pinouts and electrical specs may vary slightly between series members.