Texas Instruments

UCC3921D

UCC3921D Description

The UCC3921D is a high-performance hot swap controller designed for general-purpose applications, manufactured by Texas Instruments. This device is engineered to manage the insertion and removal of circuit boards in live systems, ensuring safe and reliable operation. The UCC3921D operates within a temperature range of 0°C to 70°C, making it suitable for a variety of environments. It features a surface-mount package, specifically an 8-pin SOIC (Small Outline Integrated Circuit) in a tube, which is ideal for compact and space-constrained designs.

With a supply current of just 1 mA, the UCC3921D is highly efficient, minimizing power consumption and heat generation. This efficiency is crucial for maintaining system performance and longevity. The device is also REACH unaffected and RoHS3 compliant, ensuring it meets stringent environmental and regulatory standards. The UCC3921D has a moisture sensitivity level (MSL) of 1, which means it is unlimited and can be safely stored and handled without special precautions.

UCC3921D Features

The UCC3921D offers a comprehensive set of programmable features that enhance its versatility and performance. These features include:

• Auto Retry: Automatically attempts to re-establish the connection after a fault, reducing downtime and improving system reliability.
• Circuit Breaker: Provides protection against overcurrent conditions, safeguarding the system from damage.
• Current Limit: Limits the maximum current draw, ensuring stable operation and preventing overloads.
• Fault Timeout: Allows for a configurable timeout period after a fault is detected, providing flexibility in system design.
• Latched Fault: Locks the fault condition until it is manually cleared, ensuring that the system remains safe and stable.

The UCC3921D also includes an Under Voltage Lock Out (UVLO) feature, which prevents the device from operating below a specified voltage threshold, ensuring reliable performance and preventing damage due to low voltage conditions. This feature is particularly beneficial in systems where voltage fluctuations are common.

UCC3921D Applications

The UCC3921D is well-suited for a wide range of general-purpose applications where hot swap functionality is required. Its compact size and efficient design make it ideal for use in:

• Data Centers: Managing the insertion and removal of server blades and storage devices without interrupting system operation.
• Telecommunications Equipment: Ensuring reliable and safe hot swap operations in routers, switches, and other networking gear.
• Industrial Control Systems: Facilitating the maintenance and upgrade of control boards in industrial environments.
• Medical Equipment: Allowing for the safe replacement of critical components in medical devices without powering down the entire system.

The UCC3921D's robust feature set and compliance with industry standards make it a reliable choice for applications where system uptime and reliability are paramount.

Conclusion of UCC3921D

The UCC3921D from Texas Instruments is a versatile and efficient hot swap controller that offers a comprehensive set of features and benefits. Its low supply current, programmable features, and robust protection mechanisms make it an ideal choice for a variety of general-purpose applications. The device's compliance with environmental and regulatory standards ensures it meets the demands of modern electronics design. Whether used in data centers, telecommunications, industrial control systems, or medical equipment, the UCC3921D provides reliable and safe hot swap functionality, enhancing system performance and reliability.