LM74502HDDFR

Overview

The LM74502HDDFR is a high-voltage N+1 ORing controller manufactured by Texas Instruments. It operates within an input voltage range of 3.2 V to 65 V and supports industrial temperature ranges from -40°C to 125°C. The device utilizes a TSOT-23-8 surface-mount package and draws a supply current of 45 µA. Key electrical parameters include a turn-on delay of 2 µs and a turn-off delay of 75 µs, with a maximum output current capability of 2.37 A.

Feature Summary

• Provides N+1 ORing control for redundant power distribution architectures
• Features adjustable output voltage slew rate control to manage inrush currents
• Includes integrated overvoltage protection mechanisms for system safeguarding

Applications

• Industrial redundant power bus systems
• High-voltage server power distribution units
• Telecommunications infrastructure power supplies

Procurement Notes

Verify the specific suffix 'H' against official datasheets to confirm high-voltage rating specifications. Ensure compatibility with existing PCB footprints for the TSOT-23-8 package. Cross-reference RoHS compliance status with current manufacturer declarations prior to final procurement decisions.

Selection Notes

Select this component when designing systems requiring robust ORing functionality for voltages up to 65 V. Consider the low quiescent current for efficiency-sensitive applications. Evaluate thermal performance requirements based on the small form factor and expected load conditions during continuous operation.

Part Context

This part belongs to the LM74502 family of ideal diode controllers. It serves as a specialized power management IC designed to replace traditional diodes in power paths, offering lower voltage drops and improved efficiency compared to standard rectification methods in high-voltage environments.

Replacement Considerations

LM74502DDFR