Second-Order Sliding-Mode Controller for Boost Converters with Parameter Estimation

This paper proposes a Second-Order Sliding-Mode (SOSM) controller for dc-dc boost converter. The proposed controller is implemented in a simple state-machine structure. A parameter estimation method is proposed to improve the robustness of the dc-dc boost converter under unknown load disturbances. The SOSM controller can achieve a time-optimal dynamic response under unknown load disturbances without requiring the information of load or an integral term. The proposed control approach is verified by experimental results on a 1.5A, 12V prototype.