Texas Instruments

UCC3921D/81143

UCC3921D/81143 Description

The UCC3921D/81143 is a General Purpose Hot Swap Controller designed by Texas Instruments, a leading manufacturer in the Power Management (PMIC) category. This IC is housed in an 8SOIC package and is suitable for surface mount applications. It operates within a temperature range of 0°C to 70°C, making it ideal for a variety of general-purpose applications where reliability and performance are paramount.

UCC3921D/81143 Features

The UCC3921D/81143 offers several unique features that set it apart from similar models in the market. Key features include:

• UVLO (Under-Voltage Lockout): Ensures the device remains off until the input voltage reaches a safe operating level, protecting the system from damage due to insufficient power supply.
• Programmable Features: The controller includes programmable options such as Auto Retry, Circuit Breaker, Current Limit, Fault Timeout, and Latched Fault. These features provide flexibility in managing fault conditions and optimizing system performance.
• Low Supply Current: With a supply current of only 1 mA, the UCC3921D/81143 is highly efficient, minimizing power consumption and heat generation.
• Single Channel: The device is designed for single-channel operation, simplifying the design process and reducing complexity in applications where a single hot swap control is sufficient.
• Compliance and Safety: The UCC3921D/81143 is REACH Unaffected and ROHS3 Compliant, ensuring it meets the latest environmental and safety standards. It also has a Moisture Sensitivity Level (MSL) of 2 (1 Year), making it suitable for environments with varying humidity levels.

UCC3921D/81143 Applications

The UCC3921D/81143 is versatile and can be used in a wide range of general-purpose applications. Some specific use cases where this product excels include:

• Data Centers: Managing power supply to servers and storage devices, ensuring smooth operation and protection against power surges.
• Telecommunications: Controlling power in base stations and network equipment, where reliability and fault tolerance are critical.
• Industrial Equipment: Providing robust power management in industrial control systems, where the device's programmable features can be tailored to specific operational requirements.
• Consumer Electronics: Ensuring safe and efficient power delivery in devices such as routers, modems, and other network peripherals.

Conclusion of UCC3921D/81143

The UCC3921D/81143 from Texas Instruments is a reliable and efficient Hot Swap Controller designed for general-purpose applications. Its unique features, such as UVLO and programmable fault management, offer significant advantages over similar models. The device's low supply current and compliance with environmental standards make it an ideal choice for a variety of applications, from data centers to consumer electronics. Despite being marked as obsolete, the UCC3921D/81143 remains a valuable component for designers looking for a robust and flexible hot swap control solution.