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本文提出了一种用于600V超级结MOSFET的有源转换率控制栅极驱动器，采用鲁棒离散时间反馈技术实现4.5V/ns的快速电压转换率，旨在最小化开关损耗同时满足噪声抑制要求。
Active gate control is an emerging technique to minimize the switching loss of highpower converters facing noise-suppression challenges. In a conventional gate-driver design, a fixed value of gate resistance is chosen by the converter designers so that the slew rate (SR) of the drain voltage Vd, namely dVd/dt, does not exceed noise-aware design guidelines in each application and use case. Minimizing the gate resistance leads to high dVd/dt and the reduction in switching loss while shortening the turn-on delay for the overall converter performance. However, the impact is limited because of uncontrollable dVd/dt drift caused by load-current, temperature, and Vth variations of the power transistors. Thus, in practice there is significant room for further loss and turn-on-delay minimization for the active gate control that adaptively modulates gatedriving ability within every switching cycle. Several feedback techniques based on real-time SR monitoring have been studied with
Shusuke Kawai, Takeshi Ueno, Kohei Onizuka
Toshiba, Kawasaki, Japan