onsemi

UC3845DR2G  

DC DC Switching Controllers

UC3845DR2G Description

The UC3845DR2G is a transistor driver IC designed for power management applications, specifically tailored for boost and flyback topologies. Manufactured by onsemi, this IC is part of the Power Management (PMIC) category and is housed in a Surface Mount package, specifically a 14SOIC. Despite being marked as obsolete, the UC3845DR2G remains a robust choice for applications requiring reliable and efficient power conversion.

UC3845DR2G Features

• Output Type: The UC3845DR2G is designed as a Transistor Driver, capable of driving external transistors to achieve efficient power conversion.
• Output Configuration: It supports a positive output configuration and is capable of isolation, making it suitable for applications requiring electrical isolation.
• Frequency - Switching: The IC can operate at frequencies up to 500kHz, enabling high-frequency switching and compact designs.
• Voltage - Supply (Vcc/Vdd): It operates within a supply voltage range of 7.6V to 30V, providing flexibility in power supply requirements.
• Operating Temperature: The UC3845DR2G is designed to operate within an ambient temperature range of 0°C to 70°C, ensuring reliable performance in various environmental conditions.
• Control Features: It includes frequency control, allowing precise regulation of the switching frequency.
• Duty Cycle (Max): The maximum duty cycle is 48%, which helps in maintaining stable and efficient power conversion.
• Moisture Sensitivity Level (MSL): With an MSL of 1 (Unlimited), the IC is suitable for a wide range of manufacturing processes without concerns about moisture sensitivity.
• Synchronous Rectifier: The UC3845DR2G does not support synchronous rectification, which simplifies the design for applications where this feature is not.
  required- Clock Sync: It does not support clock synchronization, which is not a requirement for many power management applications.
• Number of Outputs: The IC features a single output, which is ideal for applications requiring a straightforward and efficient power conversion solution.
• Output Phases: It operates with a single output phase, ensuring simplicity and reliability in power delivery.
• Package: The UC3845DR2G is available in a Tape & Reel (TR) package, facilitating easy handling and integration into automated assembly processes.
• REACH Status: The IC is REACH unaffected, ensuring compliance with environmental and safety regulations.
• ECCN: The Export Control Classification Number (ECCN) is EAR99, indicating that the product is subject to minimal export restrictions.
• HTSUS: The Harmonized Tariff Schedule of the United States (HTSUS) code is 8542.31.0001, facilitating customs and import processes.

UC3845DR2G Applications

The UC3845DR2G is ideal for a variety of applications that require efficient power conversion and reliable performance. Some specific use cases include:

• Power Supplies: The IC is well-suited for designing power supplies that require high efficiency and compact form factors, such as those used in consumer electronics and industrial equipment.
• Adapters and Chargers: It can be used in the development of adapters and chargers for portable devices, where high-frequency operation and compact design are crucial.
• Lighting Applications: The UC3845DR2G can be employed in LED lighting systems, where boost and flyback topologies are commonly used to achieve efficient power conversion and stable output.
• Telecommunications: In telecom equipment, the IC can provide reliable power management solutions, ensuring stable operation within the specified temperature range.

Conclusion of UC3845DR2

GThe UC3845DR2G, despite being marked as obsolete, remains a valuable component in the power management domain. Its unique features, such as high-frequency operation, wide supply voltage range, and robust operating temperature range, make it a reliable choice for various applications. The IC's ability to support boost and flyback topologies, combined with its single output and frequency control, simplifies design and enhances efficiency. While it may not support synchronous rectification or clock synchronization, the UC3845DR2G offers a straightforward and efficient solution for power conversion needs. Its compliance with REACH and minimal export restrictions further enhances its suitability for global applications.

UC3845DR2G Documents

Download datasheets and manufacturer documentation for UC3845DR2G

Datasheets :

UC3844-45, UC2844-45      

PCN Obsolescence/ EOL :

Multiple Devices 15/May/2006      

HTML Datasheet :

UC3844-45, UC2844-45      

Environmental Information :

onsemi RoHS