UC2843AD8TR

Power Supply Controllers, Monitors Overview

The UC2843AD8TR is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance DC-DC converter applications. It operates within an input voltage range of 8.2 V to 25 V, with a nominal supply voltage of 15 V. The device supports switching frequencies up to 500 kHz and delivers a maximum duty cycle of 100%. It features a single output capable of sourcing 200 mA at 5 V. The component is housed in an 8-pin SOIC package (SOIC-8) with dimensions of 4.9 mm in length. It functions reliably across a temperature range of -40 °C to +85 °C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for enhanced transient response and simplified compensation.

Power Supply Controllers, Monitors Applications

• Boost converter topologies
• Flyback power supplies
• Forward converter designs

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'D8TR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the operating temperature grade matches the industrial specification (-40 °C to +85 °C) rather than automotive or extended grades. Ensure compliance with RoHS directives if environmental regulations apply to the final product assembly line.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated or non-isolated converters requiring precise current-mode regulation. It is suitable for applications needing a wide input voltage range and high-frequency operation up to 500 kHz. Consider the 8-SOIC package constraints for thermal management and PCB layout space. Evaluate the 200 mA output drive capability against the external MOSFET gate charge requirements.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC2843 family of current-mode PWM controllers from Texas Instruments. It shares functional similarities with the UC1843 and UC3843 series, differing primarily in temperature rating and manufacturing revisions. The UC2843AD8TR represents the commercial/industrial grade variant, distinct from the automotive-grade UC2843AQ series which offers extended temperature capabilities.

Power Supply Controllers, Monitors Replacement Considerations

UC2843ADTR is a direct manufacturer-recommended replacement offering identical electrical characteristics and pinout compatibility. UC2843BDR2G from onsemi serves as a similar alternative but requires verification of specific parameter tolerances and package dimensional accuracy before integration.