E-UC2845BD1

DC DC Switching Controllers Overview

The E-UC2845BD1 is a current mode PWM controller from the UC384xB family, manufactured by STMicroelectronics. It operates with a switching frequency up to 500 kHz and supports boost, flyback, and forward topologies. The device features a single output channel with a maximum duty cycle of 48% to 50%. It functions within a supply voltage range of 7.6 V to 30 V and delivers an output current of 1 A. The component is housed in an 8-pin SOIC package and is designed for off-line or DC-to-DC power supply applications.

DC DC Switching Controllers Feature Summary

• Implements fixed-frequency current mode control for efficient power regulation
• Supports multiple converter topologies including boost, flyback, and forward
• Includes built-in high-current output stage capable of driving external MOSFETs

DC DC Switching Controllers Applications

• Off-line AC-DC converters
• DC-to-DC step-up (boost) converters
• Flyback power supply designs
• Forward converter implementations

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'E' against the official STMicroelectronics datasheet to confirm it denotes a standard commercial grade variant rather than a specialized industrial or automotive qualification. Ensure the ordering part number matches the exact package marking and RoHS compliance status required for your bill of materials. Cross-reference the manufacturer's latest documentation to confirm availability and any potential lifecycle changes.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring a robust current-mode controller with integrated high-current drive capabilities. It is suitable for applications needing frequencies up to 500 kHz and supports common isolated and non-isolated topologies. Consider the 48% to 50% maximum duty cycle limitation when designing transformer ratios and feedback loops for your specific voltage conversion requirements.

DC DC Switching Controllers Part Context

This part belongs to the widely used UC384xB series of current mode PWM controllers. These ICs are industry-standard solutions for offline and DC-DC switching power supplies. The UC2845 variant specifically offers a higher operating frequency compared to lower-speed counterparts, allowing for smaller passive components in compact power adapter and server PSU designs.

DC DC Switching Controllers Replacement Considerations

Direct pin-compatible substitutes include the UC2845D and UC2845N from various manufacturers. Verify electrical parameters such as supply voltage range and output current capability before substitution. Ensure the replacement part supports the same SOIC-8 package and thermal characteristics.