Texas Instruments

LM5021NA-1  

AC DC Converters, Offline Switches

LM5021NA-1 Description

The LM5021NA-1 is a versatile offline switcher IC designed for power management applications, manufactured by Texas Instruments. This device is part of the Power Management Integrated Circuit (PMIC) category and is known for its robust performance and reliability. The LM5021NA-1 is designed with a through-hole mounting type, making it suitable for a wide range of applications where durability and ease of installation are crucial. It features a flyback and forward topology, providing flexibility in circuit design and ensuring efficient power conversion.

LM5021NA-1 Features

The LM5021NA-1 offers a comprehensive set of features that enhance its performance and usability. Key features include:

• Frequency Control, Soft Start, and Sync: These control features ensure smooth operation and synchronization with other system components, reducing electromagnetic interference (EMI) and improving overall system stability.
• Fault Protection: The device includes current limiting and overload protection, safeguarding the system from potential damage due to excessive current or load conditions.
• High Switching Frequency: With a switching frequency of up to 1MHz, the LM5021NA-1 can achieve high efficiency and reduced component size, making it ideal for compact power supply designs.
• Wide Supply Voltage Range: The IC operates with a supply voltage (Vcc/Vdd) ranging from 8V to 30V, providing flexibility in power source selection.
• High Duty Cycle: A maximum duty cycle of 80% allows for efficient power transfer and minimal energy loss.
• Output Isolation: The isolated output ensures safety and reliability in applications where galvanic isolation is required.
• Compliance and Packaging: The LM5021NA-1 is REACH unaffected and comes in a tube package, ensuring compliance with environmental regulations and ease of handling during assembly processes.

LM5021NA-1 Applications

The LM5021NA-1 is well-suited for a variety of applications due to its robust features and versatile design. Some specific use cases include:

• Power Supply Units: Ideal for designing efficient and compact power supplies for consumer electronics, industrial equipment, and medical devices.
• Adaptive Voltage Regulators: The wide supply voltage range and high switching frequency make it suitable for adaptive voltage regulator applications, ensuring stable power delivery under varying load conditions.
• Isolated Power Converters: The output isolation feature makes it a perfect choice for applications requiring galvanic isolation, such as in telecommunications and industrial control systems.
• Energy-Efficient Systems: The high efficiency and reduced component size contribute to energy-saving designs, making it suitable for green energy applications and battery-operated devices.

Conclusion of LM5021NA-1

The LM5021NA-1 by Texas Instruments is a reliable and versatile offline switcher IC designed for power management applications. Its comprehensive set of features, including frequency control, fault protection, and high switching frequency, make it an excellent choice for a wide range of applications. The device's wide supply voltage range, high duty cycle, and output isolation further enhance its performance and usability. While the product is now obsolete, its legacy continues to influence modern power management solutions, making it a benchmark for future developments in the field.

LM5021NA-1 Documents

Download datasheets and manufacturer documentation for LM5021NA-1

Datasheets :

LM5021MMX-2      

Design Resources :

Load Detecting Pwr Supply RD-166