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Efficient DC-DC Converter Using Variable Switching Frequency Digital Controller

In this research paper, load adaptive high efficiency DC-DC converter with optimized switching control is suggested. The converter is controlled over a wide load range by auto-tuning the switching frequency. The desired switching frequency is selected depend upon load current value. The new algorithm is presented to adapt the loading condition while maintaining the constant output voltage. This algorithm is implemented in a simulation environment where converter continuously maintains the optimal switching frequency under varying converter parameters and operating conditions. This Adaptive frequency Optimization (AFO) proposed controller performance is simulated and proposed algorithm is verified successfully. The efficiency curves are also plotted for different values of load current which provides validation of proposed adaptive frequency optimization algorithm.