UCC3912DP

Overview

The UCC3912DP is a programmable hot swap power manager manufactured by Texas Instruments, originally developed by Unitrode. It provides comprehensive protection for circuit boards during insertion into live backplanes. The device features an internal N-channel MOSFET switch and supports supply voltages from 3V to 8V. Key electrical parameters include a maximum output current of 4A and a supply current of 1mA. It operates within a temperature range of 0°C to 70°C and is housed in a 24-PowerTSSOP package.

Feature Summary

• Integrates an internal N-channel MOSFET for efficient power switching without external components.
• Provides programmable current limiting and fault timeout capabilities to protect against overcurrent conditions.
• Includes thermal shutdown protection to prevent damage during overheating events.
• Features latch-off fault response to isolate the board immediately upon critical failure.

Applications

• Hot swap applications in telecommunications equipment
• Insertion protection for industrial control boards
• General purpose circuit board protection in modular systems

Procurement Notes

Verify component authenticity through authorized distributors as counterfeits exist. Confirm package marking matches the 24-PowerTSSOP specification. Check manufacturing date codes for compliance with RoHS standards. Ensure storage conditions respect moisture sensitivity level 2 requirements before reflow soldering.

Selection Notes

Select this component when designing systems requiring protected board insertion into active backplanes. It is suitable for low-voltage applications between 3V and 8V. Consider the internal MOSFET capability for currents up to 4A. Evaluate the programmable features if specific trip points are required for unique load profiles.

Part Context

This part belongs to the UCC391x series of hot swap controllers from Texas Instruments. It shares functional similarities with other models like the UCC39151 but differs in voltage range and package type. The series is designed for general-purpose protection in modular electronics where live insertion is necessary.

Replacement Considerations

Direct replacement options may be limited due to the specific 24-PowerTSSOP package and 3V-8V operating range. Verify pin compatibility and thermal characteristics if substituting with similar hot swap managers from other manufacturers or different TI series members.

FAQ

What is the fault response behavior of the UCC3912DP?

The device utilizes a latch-off fault response, which turns off the internal MOSFET and remains latched until the fault condition is removed and the enable pin is cycled.

Does the UCC3912DP require an external MOSFET?

No, it integrates an internal N-channel MOSFET switch, eliminating the need for external pass transistors in standard applications.