• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.5
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• pp.853-860
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• 2024

In this study, a design method for a PWM control-based single input/single output buck DC-DC converter with multiple output voltages was studied which is recently required in industrial electronic devices. Based on the basic theory of the buck DC-DC converter, the design method of the buck converter was determined and a voltage control algorithm based on PWM control for a single-input, single-output buck converter that can selectively obtain multi-level output voltages was developed. To verify the effectiveness of the design methodology, a prototype was designed and made. Next, under a test environment based on the prototype DC-DC converter, the effectiveness of the PWM control-based voltage control method was verified by confirming that the multiple output voltages track within an error rate of 7% when the target voltages are selectively determined for the fixed and variable input voltages.