Auxiliary Parallel Inductor Switching Control for Improving the Load Transient Response Performance of Buck Converters

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

“…Section III presents the derivation of kp in detail. The undershoot ∆vO is solely determined by A1 as in (2).…”

“…Beginning with the time-optimal control (TOC) of the buck converter to minimize the output voltage fluctuation without the aid of auxiliary circuit components [1], various control schemes have been reported to improve the load transient response. Studies [2]- [6] utilize resistive auxiliary circuits for its simple structure and control. The auxiliary switched parallel inductor [2] and the auxiliary switched resistor [3]- [4] suppresses the output voltage fluctuation at the cost of reduced efficiency during the load transient.…”

“…Studies [2]- [6] utilize resistive auxiliary circuits for its simple structure and control. The auxiliary switched parallel inductor [2] and the auxiliary switched resistor [3]- [4] suppresses the output voltage fluctuation at the cost of reduced efficiency during the load transient. The increased electromagnetic interference (EMI) owing to the high di/dt of the auxiliary switches is another drawback of these techniques.…”

Reliability Improvement of Voltage Regulator Modules by a Virtual Series Voltage Source

“…Unfortunately, capacitors are one of the most vulnerable links in power electronic converters [4]− [6]. For reliability reasons, it is essential to reduce the capacitance [2] S×5, L×1, C×2 output-side buck-boost circuit [9] S×2, L×1, C×1 II small auxiliary phase [10] S×2, L×1 buck-boost circuit [7], [11] S×1, L×1, D×1 resonant circuit [12] S×2, L×2, C×1 III parallel-inductor circuit [13] S×4, L×1, R×1 parallel-coupled-inductor circuit [14] S×3, D×1, R×1 series-coupled-inductor circuit [15] S×2 Proposed virtual series voltage source S×1 Note: S-switch, L-inductor, D-diode, C-capacitor, R-resistor.…”