Texas Instruments

UC3868N

UC3868N Description

The UC3868N is a versatile transistor driver designed for DC-to-DC switching controllers, manufactured by Texas Instruments. This integrated circuit (IC) is part of the UC3868 family and is packaged in a through-hole configuration, making it suitable for a wide range of applications. Despite being marked as obsolete, the UC3868N remains a reliable choice for engineers and designers due to its robust performance and compatibility with various power supply designs.

UC3868N Features

• Output Type: The UC3868N is a transistor driver, specifically designed to drive power transistors in switching power supplies.
• Output Configuration: It features a positive output configuration, which simplifies the design of power circuits.
• Switching Frequency: The IC supports a wide switching frequency range of 50kHz to 500kHz, allowing for efficient power conversion across various applications.
• Supply Voltage: The UC3868N operates within a supply voltage range of 7V to 22V, providing flexibility in power supply design.
• Soft Start: This feature ensures a smooth startup process, reducing inrush currents and protecting the power supply components.
• Maximum Duty Cycle: The IC supports a maximum duty cycle of 100%, enabling efficient power transfer and high output power levels.
• Output Phases: It features a single output phase, which simplifies the control and synchronization of the power supply.
• Compliance and Packaging: The UC3868N is REACH unaffected and RoHS3 compliant, ensuring environmental and regulatory compliance. It is packaged in a tube format, facilitating easy handling and integration into through-hole PCB designs.

UC3868N Applications

The UC3868N is ideal for a variety of applications due to its wide operating range and robust features. Some specific use cases include:

• Switching Power Supplies: The IC is well-suited for designing efficient switching power supplies, where its wide frequency range and high duty cycle capabilities can significantly improve performance.
• DC-to-DC Converters: The UC3868N can be used in DC-to-DC converters to achieve high efficiency and power density, making it a popular choice for compact power supply designs.
• Battery Chargers: Its ability to handle a wide range of input voltages and provide precise control makes it suitable for battery charging applications, ensuring safe and efficient charging processes.
• Industrial Power Supplies: The robustness and reliability of the UC3868N make it an excellent choice for industrial power supplies, where high efficiency and long-term stability are critical.

Conclusion of UC3868N

Despite its obsolescence, the UC3868N remains a valuable component in the electronics industry due to its comprehensive feature set and proven performance. Its wide switching frequency range, high duty cycle, and soft start capabilities make it an ideal choice for a variety of power supply applications. The UC3868N's compliance with environmental regulations and its through-hole mounting type further enhance its appeal for engineers and designers. While newer alternatives may offer advanced features, the UC3868N continues to provide reliable performance and compatibility with existing designs, making it a reliable choice for power supply applications.