Texas Instruments

UC3846Q  

DC DC Switching Controllers

UC3846Q Description

The UC3846Q is a highly integrated DC-DC switching controller designed for a wide range of power conversion applications. Manufactured by Texas Instruments, this controller is part of the DC DC Switching Controllers category and is known for its robust performance and versatility. The UC3846Q features a transistor driver output type with a positive output configuration, making it suitable for driving external power transistors efficiently. Despite being marked as obsolete, the UC3846Q remains a reliable choice for engineers and designers due to its comprehensive feature set and compatibility with various power supply designs.

UC3846Q Features

The UC3846Q offers several key features that enhance its performance and usability in power conversion systems:

• Output Type and Configuration: The UC3846Q is designed as a transistor driver with a positive output configuration, ensuring efficient power delivery and control.
• Switching Frequency: It operates at a switching frequency of 500kHz, which allows for high efficiency and reduced component size in power supply designs.
• Supply Voltage Range: The controller supports a wide supply voltage range of 6.95V to 40V, making it suitable for a variety of input voltage conditions.
• Control Features: The UC3846Q includes essential control features such as current limit, enable, frequency control, and soft start. These features provide precise control over the power conversion process and enhance system reliability.
• Synchronous Rectification: The inclusion of synchronous rectification helps improve efficiency by reducing power losses in the rectification stage.
• Clock Synchronization: The controller supports clock synchronization, which is beneficial for multi-phase designs and reducing electromagnetic interference (EMI).
• Output Phases: The UC3846Q is designed for single-phase operation, simplifying the design process while maintaining high efficiency.
• Duty Cycle: The maximum duty cycle is 50%, which is ideal for maintaining stability and efficiency in various load conditions.
• Compliance and Packaging: The UC3846Q is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and regulatory standards. It is packaged in a tube format, which is suitable for surface mount applications.

UC3846Q Applications

The UC3846Q is ideal for a variety of applications where high efficiency and reliable power conversion are required. Some specific use cases include:

• Power Supplies: The UC3846Q is well-suited for designing efficient power supplies for consumer electronics, telecommunications equipment, and industrial applications.
• DC-DC Converters: Its high switching frequency and wide input voltage range make it a preferred choice for compact and efficient DC-DC converter designs.
• Battery Chargers: The controller's features, such as current limit and soft start, make it suitable for designing battery chargers that require precise control and protection mechanisms.
• Embedded Systems: The UC3846Q can be used in embedded systems where power efficiency and reliability are critical, such as in automotive electronics and IoT devices.

Conclusion of UC3846Q

The UC3846Q from Texas Instruments is a versatile and reliable DC-DC switching controller that offers a comprehensive set of features for efficient power conversion. Despite its obsolete status, the UC3846Q remains a valuable component for engineers and designers due to its wide supply voltage range, high switching frequency, and advanced control features. Its compatibility with various power supply designs and compliance with environmental standards make it a practical choice for a range of applications. Whether used in power supplies, DC-DC converters, battery chargers, or embedded systems, the UC3846Q delivers high performance and reliability, ensuring efficient power management in modern electronic devices.

UC3846Q Documents

Download datasheets and manufacturer documentation for UC3846Q

Datasheets :

UC1846,7, 2846,7, 3846,7      

PCN Obsolescence/ EOL :

UCYYY 29/Jun/2017      

HTML Datasheet :

UC1846,7, 2846,7, 3846,7