UCC3917DTR

Overview

The UCC3917DTR is a positive floating hot-swap power manager manufactured by Texas Instruments. It is designed for applications requiring controlled insertion of printed circuit boards into live backplanes. The device integrates precise current limiting, voltage monitoring, and fault protection logic to ensure safe system operation during board insertion and removal.

Feature Summary

• Integrates programmable current limit control for soft-start and overcurrent protection
• Provides continuous monitoring of bus voltage and load conditions
• Includes built-in fault detection mechanisms for short circuits and thermal events

Applications

• Controlled insertion of daughter cards into active backplanes
• Hot-swappable server blade power management
• Telecommunications equipment board replacement systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package and temperature grade. Review the latest datasheet revision history for any functional updates or pinout changes before finalizing procurement specifications.

Selection Notes

Select this component when designing systems that require robust protection during live board insertion. Ensure the external sense resistor values align with the desired current limit thresholds. Verify compatibility with the target backplane voltage levels and thermal environment constraints.

Part Context

This part belongs to the UCC391x family of hot-swap controllers. It serves as a critical interface component in modular electronic systems, bridging the power delivery infrastructure with individual circuit boards while preventing electrical stress during dynamic connection events.

Replacement Considerations

Public confirmed substitute part numbers include UCC3917D.