UC2843D8

Power Supply Controllers, Monitors Overview

The UC2843D8 is a current-mode PWM controller manufactured by Texas Instruments, designed for offline and DC-to-DC fixed-frequency control schemes. 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 delivers a peak output current of 200 mA. It features a maximum duty cycle of 100% and includes internal circuitry such as an error amplifier, UVLO, and latch logic. The component is housed in an 8-pin SOIC package and functions across a temperature range of -40°C to 85°C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode pulse width modulation control for efficient power conversion
• Integrates low startup current under-voltage lockout (UVLO) with hysteresis
• Features a high-current图腾柱 output stage optimized for driving N-channel MOSFETs
• Includes internal latch protection and precision reference adjustment at the error amplifier input

Power Supply Controllers, Monitors Applications

• Offline flyback power supplies
• Forward converter topologies
• Boost DC-to-DC converters
• General-purpose switched-mode power supplies

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'D8' against the manufacturer's official ordering guide to confirm the exact package type and tape/reel specifications. Ensure that the procurement channel provides valid traceability documentation consistent with Texas Instruments standards. Confirm that the delivered units match the specified commercial temperature grade and pin configuration before integration into production systems.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing circuits requiring a robust current-mode controller with integrated protection features. The UC2843D8 is suitable for applications needing a wide operating voltage range and high peak drive capability. Consider the thermal performance of the SOIC package and ensure adequate PCB layout practices are followed to manage heat dissipation within the specified operational temperature limits.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers from Texas Instruments. The UC284x series specifically denotes devices rated for the commercial temperature range of -40°C to 85°C. This family provides a standardized solution for various power supply topologies, offering compatibility with other members like the UC2842 and UC2844 through shared functional architectures.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include the UC2843AD8TRG4 and UC2843AQD8. Verify that alternative parts maintain identical pinouts and electrical characteristics. Automotive-grade variants like the UC2843AQD8RG4Q1 require confirmation of AEC-Q100 compliance if automotive reliability is necessary.