Voltage Mode Controlled Buck Converter Under Input Voltage Variations (original) (raw)

Design of DC-DC Buck Converter

Buck Converter is a voltage step-down and current step-up converter. It is a DC-DC converter. Buck converter is the most basic Switched-Mode Power Supply (SMPS) topology. It is widely used throughout the industry to convert a higher input voltage into a lower output voltage. The Buck Converter is used in SMPS circuits where the DC output voltage needs to be lower than the DC input voltage. Desired target is to design Buck Converter for 15 V input with output 5V @10W. In this report will including the design details, required wave forms to verify the correctness of the circuit, the voltage gain, inductor current/output voltage ripple, stray components and their influences, efficiency charted from rated down to 10% load, the switching loss, and performance comparison of different selections of devices.

Mathematical Modelling and Representation of DC to DC Converter (Buck Converter)

International Journal for Research in Applied Science and Engineering Technology IJRASET, 2020

The switched mode dc to dc converters are one of the easiest power electronic circuits which convert voltage to one level into another level by its own switching action. These converters have covered wide areas of Power-electronics, due to their various applications like power supplies for personal computers, office equipment’s, industrial applications, DC drives, automotive, aircraft, etc. Control and stabilization of converters by their switching phenomenon are the main factors.

COMPARATIVE STUDY OF CONVENTIONAL CONTROL TECHNIQUES FOR A DC-DC BUCK CONVERTER

Journal of Research in Engineering and Applied Sciences, 2021

In this paper, conventional controllers like P, I, PID are designed for a DC-DC buck converter. The purpose of the controller is to maintain the output voltage. A comparative study of the control techniques is carried out. The overall system response is analyzed based on the performance and robustness. The usefulness of the control technique is tested by changing the reference voltage, introducing disturbances in the input voltage and parameters of the buck converter. Simulation results validate the efficacy of the conventional controllers.

FPGA implementation of fixed-point arithmetic voltage mode controller for the Buck converter

2021 9th International Conference on Modern Power Systems (MPS), 2021

A digital implementation of the voltage mode control for buck converters was designed and demonstrated on an FPGA development board. The digital control uses a fixed-point structure that increases the control accuracy without increasing the number of arithmetic operations. A soft-start function was included to minimize the output voltage overshoot at startup; an over-current protection function was also integrated in the experimental setup. The buck converter was designed to supply 3. 3V from an input voltage ranging from SV to 16V. Measurements results presented in the paper validate the design: 61mV maximum overshoot on startup; load transients of 164mV overshoot and 145. 5mV undershoot for a load jump from 150mA to 1. 1A, line transient of 236mV overshoot and 21SmV undershoot for 4V line jump and 44mV maximum output voltage ripple. The control loop stability margins were also assessed through measurements: they shown a minimum phase margin of 38.5° and a minimum gain margin of 11dB for a 16V input voltage and a 1. S4A load current.