UC2853DTR

Overview

The UC2853DTR is a high power factor preregulator controller manufactured by Texas Instruments. It implements average current mode control for continuous conduction mode (CCM) operation. The device operates within an operating supply voltage range up to 40 V and features undervoltage lockout thresholds at 11.5 V (on) and 9.5 V (off). It supports practical operating frequencies up to 0.115 MHz. The component is available in an 8-pin SOIC package.

Feature Summary

• Implements average current mode control for continuous conduction mode operation
• Includes overvoltage protection circuitry
• Features integrated undervoltage lockout with defined on/off thresholds

Applications

• High power factor preregulators
• Single-phase power factor correction systems

Procurement Notes

Verify the specific suffix 'DTR' against the official datasheet to confirm the tape-and-reel packaging configuration and temperature grade. Ensure the ordering part number matches the exact package type and thermal rating required for the design. Cross-reference the manufacturer's latest documentation to confirm active status and any recent revisions.

Selection Notes

Select this component for designs requiring single-phase PFC with average current mode control. Verify that the maximum operating frequency of 0.115 MHz meets the system requirements. Confirm compatibility with the 8-pin SOIC footprint and ensure the supply voltage remains within the specified limits during all operating conditions.

Part Context

This part belongs to the UCx853 family of high power factor preregulators from Texas Instruments. It is functionally related to variants such as the UC3853 and UC2853, which share similar control architectures but may differ in temperature ranges or packaging options. The DTR suffix specifically denotes the surface-mount reel packaging variant.

Replacement Considerations

Official substitutes include UC2853DTRG4 and UC3853DTRG4. Verify pinout compatibility and electrical specifications before substitution.