UC3853DTR

Overview

The UC3853DTR is a high power factor preregulator manufactured by Texas Instruments. It operates within an operating supply voltage range of 12V to 40V and supports a practical maximum frequency of 0.115 MHz. The device utilizes average current mode control for continuous conduction mode (CCM) operation. It features a peak output sink gate drive current of 1A and a peak output source gate drive current of -1A. The component functions with a startup current of 0.25 mA and an operating supply current of 10 mA. UVLO thresholds are set at 11.5V for turn-on and 9.5V for turn-off.

Feature Summary

• Implements average current mode control for continuous conduction mode operation
• Designed specifically as a high power factor preregulator
• Includes under-voltage lockout protection with defined on/off thresholds

Applications

• High power factor preregulator circuits
• Power factor correction systems
• Single-phase AC-DC conversion designs

Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in packaging or lead times without altering core functionality. Confirm availability status through authorized channels, as distribution data may reflect temporary stock levels rather than permanent obsolescence. Ensure compliance with RoHS directives if required for the target market.

Selection Notes

Select this component when designing single-phase power factor correction applications requiring average current mode control. The UC3853DTR is suitable for systems needing a dedicated high power factor preregulator solution. Consider the 12V to 40V supply range and the 0.115 MHz frequency limit during system planning.

Part Context

The UC3853DTR belongs to the UC3853 family of high power factor preregulators from Texas Instruments. This series addresses power factor correction needs in single-phase applications. The DTR suffix typically denotes a tape-and-reel packaging format for surface-mount assembly, distinguishing it from tube-packaged variants like the UC3853N.

Replacement Considerations

Public confirmed substitutes include UC2853DTRG4 and UC3853DTRG4.