Understanding Power Supply Current Handling Issues: Causes and Solutions

Troubleshooting power supply current handling issues is crucial to achieving optimal performance of your electronic devices.

In this video, we will explore the common reasons why a power supply fails to handle the defined output current and provide practical solutions to solving these issues. Whether you are designing a power supply or repairing an existing one, understanding the structure of the power supply is key to quickly solving these problems.

This guide primarily focuses on Flyback-type power supplies that are widely used in applications up to 100W. By examining the block diagrams of Flyback converters, we can gain insight into the intricacies of current control mechanisms.

Design considerations, such as accurate transformer calculations and proper winding techniques, are essential for those creating power supplies from scratch. For repair attempts, it is crucial to evaluate components such as the current sense resistor, Mosfet, and assess the PWM controller for any potential damage.

By following the step-by-step troubleshooting techniques outlined in this guide, you will be equipped with the knowledge and skills necessary to effectively diagnose and rectify power supply current handling issues.