Switching regulator using a quadratic boost converter for wide DC conversion ratios
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A controller design methodology for a quadratic boost converter with a single active switch is developed. This converter has two LC filters; thus, it will exhibit fourth-order characteristic dynamics. However, only the first inductor current and the output capacitor voltage are selected for feedback purposes. This current can also be used for one-cycle overload protection; therefore, the full benefits of current-mode control are maintained. Average current-mode control is selected over peak current-mode control because this strategy provides a faster transient response and better noise immunity. The high-gain compensator of the current loop helps tracking the current programme with a high degree of accuracy. The robustness of the proposed controller is tested under changes in the input voltage, output load and reference signal. © 2009 The Institution of Engineering and Technology.
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Active switches; Average current-mode control; BOOST converter; Controller designs; Conversion ratio; Current loop; Current Mode Control; Fourth-order; High degree of accuracy; High-gain; Inductor currents; Input voltages; LC filter; Noise immunity; Output capacitor; Output load; Overload protection; Peak current mode control; Reference signals; Switching regulator; Controllers; DC-DC converters; Electric converters; Power quality
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