Texas Instruments

UCC3809N-1  

AC DC Converters, Offline Switches

UCC3809N-1 Description

The UCC3809N-1 is an offline switch-mode power supply controller designed for a variety of topologies including Boost, Buck, Flyback, and Forward. Manufactured by Texas Instruments, this device is housed in a through-hole package and is suitable for applications requiring isolated output. The UCC3809N-1 operates within a supply voltage range of 8V to 19V and features a maximum duty cycle of 70%. It is capable of switching at a frequency of up to 1MHz, making it suitable for high-frequency applications. The device also includes control features such as frequency control and soft start, which enhance its performance and reliability. The UCC3809N-1 has a start-up voltage of 15V and is compliant with REACH and RoHS3 standards, ensuring environmental safety. Although it is currently marked as obsolete, its robust design and versatile features make it a reliable choice for legacy systems.

UCC3809N-1 Features

• Topology Support: The UCC3809N-1 supports multiple topologies, including Boost, Buck, Flyback, and Forward, making it highly versatile for various power conversion applications.
• Frequency Control and Soft Start: These features ensure smooth startup and stable operation, reducing inrush currents and improving overall system reliability.
• High Switching Frequency: With a switching frequency of up to 1MHz, the UCC3809N-1 is well-suited for applications requiring high efficiency and compact design.
• Wide Supply Voltage Range: The device operates within a supply voltage range of 8V to 19V, providing flexibility in power supply design.
• Isolated Output: The UCC3809N-1 offers isolated output, which is essential for applications requiring electrical isolation between the input and output.
• Compliance and Safety: The device is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.
• Through-Hole Mounting: The through-hole package type is ideal for applications where surface-mount technology is not preferred or feasible.

UCC3809N-1 Applications

The UCC3809N-1 is ideal for a range of applications due to its versatile topology support and robust performance features. Some specific use cases include:

• Power Supplies: The device is well-suited for designing isolated power supplies in various electronic systems.
• Adaptive Voltage Scaling: The ability to control frequency and duty cycle makes it suitable for applications requiring adaptive voltage scaling.
• High-Frequency Applications: Its high switching frequency capability makes it ideal for compact and high-efficiency power conversion systems.
• Legacy Systems: Despite being marked as obsolete, the UCC3809N-1 remains a reliable choice for maintaining and upgrading legacy systems that require its specific features.

Conclusion of UCC3809N-1

The UCC3809N-1, manufactured by Texas Instruments, is a versatile and reliable offline switch-mode power supply controller. Its support for multiple topologies, high switching frequency, and isolated output make it suitable for a wide range of applications. The inclusion of frequency control and soft start features enhances its performance and reliability. Although marked as obsolete, its robust design and compliance with environmental standards make it a valuable component for legacy systems and specific high-frequency applications.

UCC3809N-1 Documents

Download datasheets and manufacturer documentation for UCC3809N-1