UC2843BD1R2

DC DC Switching Controllers Overview

The UC2843BD1R2 is a high-performance fixed-frequency current mode PWM controller manufactured by onsemi. Designed for offline and DC-DC converter applications, it supports Boost, Flyback, and Forward topologies. The device features a precision trimmed oscillator with a guaranteed frequency of 250 kHz and current mode operation up to 500 kHz. It includes automatic feedforward compensation, latched PWM for cycle-by-cycle current limiting, and an internal trimmed reference with UVLO. The SOIC-14 package provides separate power and ground pins for the output stage.

DC DC Switching Controllers Feature Summary

• High-performance current mode control architecture
• Precision trimmed oscillator with temperature compensation
• Latched PWM for cycle-by-cycle current limiting
• Separate power and ground pins in SOIC-14 package

DC DC Switching Controllers Applications

• Offline converters
• DC-DC step-up converters
• Flyback power supplies

DC DC Switching Controllers Procurement Notes

Verify the exact suffix against official documentation, as 'UC2843BD1R2' may be a partial identifier or variant of the standard UC2843BD1R2G. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering part number matches the specific tape-and-reel packaging requirements for your assembly line.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring precise frequency control and robust current limiting. The UC2843B series is suitable for low-voltage applications due to its specific UVLO thresholds. Consider the SOIC-14 package if separate drive power and ground connections are necessary for the图腾柱 output stage to minimize noise coupling.

DC DC Switching Controllers Part Context

This part belongs to the UC284x family of current mode controllers from onsemi. These devices are industry-standard solutions for switch-mode power supplies. The UC2843 variant specifically offers adjustable slope compensation and is optimized for applications where cycle-by-cycle current limiting is critical for protection and stability.

DC DC Switching Controllers Replacement Considerations

Check for direct pin-compatible alternatives such as the UC2843D or TL2843BDR from other manufacturers. Verify that any substitute maintains the same UVLO thresholds and oscillator frequency characteristics to ensure circuit compatibility without redesign.