BU45K302G-TL

Overview

The BU45K302G-TL is a monolithic integrated circuit designed for use in switching power supply applications. It integrates a high-voltage power MOSFET with control logic, offering a compact solution for offline flyback converters. The device features an internal oscillator and current limit protection to ensure stable operation under varying load conditions. It is housed in a TO-220FP package, facilitating efficient heat dissipation for medium-power designs.

Feature Summary

• Integrated high-voltage power MOSFET with built-in control circuitry
• Internal fixed-frequency oscillator for simplified design
• Current limit protection for enhanced reliability

Applications

• Offline flyback power supplies
• General-purpose AC/DC adapters
• Battery chargers for consumer electronics

Procurement Notes

Verify the specific suffix 'TL' indicates the correct tape and reel packaging configuration as per the manufacturer's official documentation. Confirm that the TO-220FP package variant matches the thermal requirements of the target application. Cross-reference the full part number against the latest Rohm Semiconductor datasheet to ensure no revisions or obsolescence notices affect availability.

Selection Notes

Select this component when a combined power switch and controller is required to reduce board space and component count. Ensure the input voltage range and output power requirements fall within the specified limits of the integrated MOSFET. Evaluate thermal management needs based on the TO-220FP package capabilities for the intended operating environment.

Part Context

This part belongs to Rohm's series of integrated power switches aimed at simplifying offline converter designs. It replaces discrete combinations of controllers and MOSFETs, reducing assembly complexity. The series is commonly used in cost-sensitive consumer electronics where efficiency and size are critical factors.

Replacement Considerations

Consult official substitution guides for compatible parts with similar voltage ratings and package types. Verify pin compatibility and electrical characteristics before replacing the original component in existing designs.