UCC3804D

AC DC Converters, Offline Switchers Overview

The UCC3804D is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within an input voltage range of 8.3V to 12V and supports switching frequencies up to 1MHz. The device features a maximum duty cycle of 50% and includes integrated under-voltage lockout with hysteresis. It is housed in an 8-pin SOIC package and functions across a temperature range of 0°C to 70°C.

AC DC Converters, Offline Switchers Feature Summary

• Current-mode control architecture for improved line regulation
• Integrated under-voltage lockout with hysteresis
• Low power consumption suitable for battery applications
• Supports multiple converter topologies including flyback and forward

AC DC Converters, Offline Switchers Applications

• Battery-powered equipment
• Flyback converters
• Forward converters
• DC/DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 package variant. Confirm RoHS compliance status as indicated by manufacturer documentation. Ensure the operating temperature range aligns with system requirements. Check for lead-free manufacturing standards if required by project specifications.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring low quiescent current and high efficiency in isolated power supplies. The fixed 50% duty cycle limit restricts use in certain step-up applications compared to variable duty cycle controllers. Evaluate thermal performance within the SOIC-8 package constraints for the target power level.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC380x series of current-mode PWM controllers from Texas Instruments. It shares functional similarities with other members like the UCC3805 but differs in specific electrical characteristics and package options. The series is designed for cost-sensitive, low-power offline and DC/DC conversion applications.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct pin-compatible alternatives within the same family such as UCC3804N for DIP packaging or UCC3804DTR for tape-and-reel quantities. Verify that substitute parts maintain identical voltage ranges and thermal specifications.