UC2843DTR

Power Supply Controllers, Monitors Overview

The UC2843DTR is a current-mode PWM controller manufactured by Texas Instruments, housed in a 14-SOIC package. It operates within an input voltage range of 8.2 V to 25 V, with a nominal supply of 15 V. The device supports switching frequencies up to 500 kHz and features adjustable slope compensation. It includes a high-precision 5 V reference, UVLO with distinct start/stop thresholds, and a totem-pole output capable of ±1 A peak drive current. Operating temperature spans -40°C to 85°C.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture with adjustable slope compensation for stable operation
• Totem-pole output stage providing high peak drive current for power MOSFETs
• Distinctive under-voltage lockout with separate start and stop thresholds
• Integrated high-precision 5 V bandgap reference voltage source

Power Supply Controllers, Monitors Applications

• Offline flyback power supplies
• Forward converter topologies
• Boost DC-to-DC converters
• Battery chargers

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DTR' indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the 14-SOIC footprint matches the design layout. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring adjustable frequency and slope compensation. It is suitable for applications needing robust input transient response. Consider the 14-pin SOIC package for board space constraints. Verify that the operating voltage range aligns with the system's supply rails. Evaluate thermal performance within the specified industrial temperature range.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers from Texas Instruments. The series provides essential functions for fixed-frequency switching regulators with minimal external components. Variants differ in temperature grades, package types, and maximum duty cycle capabilities. The UC2843 specifically offers adjustable slope compensation for versatile topology support.

Power Supply Controllers, Monitors Replacement Considerations

UC2843ADTR is a tube-packaged alternative from the same manufacturer. UC2843BDR2G is listed as a similar replacement option. Verify pin compatibility and electrical specifications before substituting.