Design of Switching Regulated Power Supply Based on Flyback

This article presents the design of a feedback-controlled, variable direct current (DC)-regulated switch-mode power supply suitable for laboratory applications. The design includes optimization of the control loop compensation to ensure stability and responsiveness of the power supply. The hardware circuit design and implementation are described to ensure the power supply operates as intended. Experimental results demonstrate that the designed power supply functions properly within a wide input voltage range (85–265 V) and achieves adjustable DC voltage output (1–36 V). The output voltage deviation is within 1%, and the output ripple is between 1 and 2%, indicating acceptable stability and output quality of the power supply. The design meets the requirements for a variable power supply in laboratory settings, providing a new approach for DC auxiliary power supply in laboratories.