Soft-Switching Auxiliary Current Control for Improving Load Transient Response of Buck Converter

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

“…In (10), R ds is the on-state resistance of MOSFETs, which is dependent on the junction temperature T j , i.e., Here, R ds,25°C,max denotes the maximum value of R ds at 25°C, α is the temperature coefficient, which can be obtained from the datasheet [31].…”

“…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.…”

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

“…The turn-on switching loss of the auxiliary low-side MOSFET is assumed zero owing to the ZVS. In the CAC and CPM, the auxiliary MOSFETs turn ON with hard switching and their switching losses can be obtained using (26) and (27). In (24)-(27), Tt, N, Ton, and Toff are the load transient period, number of switching cycles, time duration of ONtransition, and time duration of OFF-transition of the auxiliary MOSFET, respectively.…”

“…The original concept of the proposed control has firstly been addressed in [26]. This paper focuses on the analysis and implementation of the control circuitry with comprehensive explanations.…”

Current-Limited Suboptimal Sliding Mode Control for Voltage-Regulated Synchronous Buck Converters

“…Step-down power converters remain as a subject of research due to their applications in powering integrated circuits and sensitive loads, which require fast dynamic response at their outputs, as well as very good line and load regulation rates [1]- [4]. In order to improve the transient response, several control techniques have been applied to these converters, including linear control [5], hysteresis-based control [6], [7], auxiliary current control [8], time-optimal control [9]- [11], constant on time control [12]- [15], hybrid control [16], [17] or using new sensing solutions [18].…”