UC2843D8G4

Power Supply Controllers, Monitors Overview

The UC2843D8G4 is a current-mode PWM controller manufactured by Texas Instruments, housed in an 8-pin SOIC package. It operates within a supply voltage range of 8.2 V to 25 V, with a nominal input of 15 V. The device supports switching frequencies up to 500 kHz and features a maximum duty cycle of 100%. It includes an internal 5 V reference, adjustable oscillator, and soft-start capability. The component functions across a temperature range of -40°C to +85°C and complies with RoHS standards.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for superior transient response and inherent line feed-forward compensation.
• Features asymmetric under-voltage lockout thresholds to prevent erratic startup behavior during power cycling.
• Integrates a precision 5 V bandgap reference source with high accuracy for stable error amplifier operation.

Power Supply Controllers, Monitors Applications

• Flyback converter designs
• Forward converter topologies
• Boost DC-DC step-up circuits

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'D8G4' against official Texas Instruments documentation to confirm the exact tape-and-reel packaging configuration and lead-free status. Ensure compatibility with existing PCB footprints for the SOIC-8 package. Cross-reference the revision level to guarantee alignment with current manufacturing specifications and environmental compliance requirements.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated or non-isolated converters requiring precise current-mode regulation. The UC2843 series is suitable for applications needing adjustable frequency operation via external RC components. Consider the thermal performance of the SOIC-8 package relative to the expected power dissipation in the target environment.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers from Texas Instruments. The family shares common functional blocks including the error amplifier, PWM latch, and output driver. Variants within the series differ primarily in operating temperature ranges, qualification levels, and specific pin-out configurations for different package types.

Power Supply Controllers, Monitors Replacement Considerations

Direct replacements include UC2843D8TR and UC2843AD8TRG4. Verify that substitute parts maintain identical pin assignments and electrical characteristics before integration into the design.