Texas Instruments

UC3875NG4  

AC DC Converters, Offline Switches

UC3875NG4 Description

The UC3875NG4 is a high-performance offline switch IC designed for full-bridge converters, offering robust control and protection features. Manufactured by Texas Instruments, this device is housed a in 20-pin DIP package and is suitable for a wide range of AC-DC conversion applications. The UC3875NG4 operates within a temperature range of 0°C to 70°C (TA) and is compliant with REACH and ROHS3 standards, ensuring environmental safety and regulatory adherence. The device is categorized under AC-DC Converters and Offline Switches, making it ideal for applications requiring efficient power conversion and control.

UC3875NG4 Features

The UC3875NG4 features a comprehensive set of control and protection mechanisms that enhance its performance and reliability. Key features include:

• Frequency Control: The IC supports switching frequencies up to 1MHz, enabling high-efficiency power conversion and reduced component size.
• Soft Start: This feature ensures a smooth startup process, minimizing inrush currents and protecting the circuit from potential damage.
• Synchronization: The ability to synchronize with external clocks allows for precise control and coordination in complex power systems.
• Current Limiting: Built-in fault protection mechanisms, such as current limiting, safeguard the device and connected components from overcurrent conditions.
• 100% Duty Cycle: The UC3875NG4 supports a full duty cycle, providing maximum flexibility and control over the power conversion process.
• Wide Supply Voltage Range: The device operates within a supply voltage range of 9.5V to 20V, making it suitable for various power supply configurations.
• Through Hole Mounting: The through-hole mounting type ensures mechanical stability and ease of integration into printed circuit boards.

UC3875NG4 Applications

The UC3875NG4 is ideal for applications requiring high-efficiency power conversion and robust control mechanisms. Specific use cases include:

• AC-DC Power Supplies: The device is well-suited for offline power supplies in consumer electronics, industrial equipment, and telecommunications infrastructure.
• Full-Bridge Converters: The UC3785NG4's ability to control full-bridge topologies makes it a preferred choice for high-power conversion applications.
• High-Frequency Switching Applications: The 1MHz switching frequency capability allows for compact and efficient designs, reducing the overall size and weight of power conversion systems.
• Telecommunications and Networking Equipment: The device's wide operating temperature range and compliance with international standards make it suitable for use in harsh environments and critical infrastructure.

Conclusion of UC387NG54

The UC3875NG4 from Texas Instruments stands out as a versatile and reliable offline switch IC for AC-DC conversion applications. Its comprehensive set of control features, including frequency control, soft start, and synchronization, combined with robust fault protection mechanisms, make it a superior choice over similar models. The device's ability to operate within a wide supply voltage range and support a full duty cycle further enhances its flexibility and applicability. Ideal high for-frequency switching and full-bridge converters, the UC3875NG4 is a valuable component for engineers seeking efficient and reliable power conversion solutions.

UC3875NG4 Documents

Download datasheets and manufacturer documentation for UC3875NG4

PCN Assembly/Origin :

Assembly Site 05/Oct/2018      

Datasheets :

UC2875QP      

PCN Obsolescence/ EOL :

EOL 21/Sept/2023      

HTML Datasheet :

UC2875QP