UC3845BDG

DC DC Switching Controllers Overview

The UC3845BDG is a high-performance fixed-frequency current mode PWM controller manufactured by onsemi. Designed for offline and DC-DC converter applications, it features an integrated oscillator, temperature-compensated reference, high-gain error amplifier, and current sensing comparator. The device provides a high-current totem-pole output suitable for driving power MOSFETs. It supports Boost and Flyback topologies with a maximum switching frequency of 500 kHz and a maximum duty cycle of 50%. The component operates within a supply voltage range of 7.6 V to 30 V and is housed in an 8-SOIC (0.154", 3.90mm Width) surface-mount package.

DC DC Switching Controllers Feature Summary

• Implements fixed-frequency current mode control architecture for efficient power conversion
• Includes internal oscillator and temperature-compensated reference for stable operation
• Features high-current totem-pole output stage optimized for direct MOSFET drive
• Supports isolated and non-isolated DC-DC converter topologies

DC DC Switching Controllers Applications

• Offline flyback converters
• Forward converters
• DC-to-DC step-up (Boost) converters
• Battery chargers

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'DG' corresponds to the tube packaging variant rather than tape-and-reel configurations when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected distributor provides valid traceability data for quality assurance purposes.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring robust current-mode control with minimal external circuitry. The 8-pin SOIC package facilitates compact PCB layouts. Consider thermal management requirements based on the operating temperature range and load conditions during system design.

DC DC Switching Controllers Part Context

This part belongs to the UC3845B series of high-performance current controllers. It shares functional similarities with the UC3844B and UC3842B series but offers specific electrical characteristics tailored for modern switching power supplies. The device is widely utilized in industrial and consumer electronics power stages.

DC DC Switching Controllers Replacement Considerations

Compatible substitutes include UC3845BD1R2G and UC3845BVDR2G. Verify pin compatibility and packaging differences before substitution.