<p>This paper proposes a robust control technique for a four-phase interleaved boost converter for fuel cell applications which is constructed using a field-programmable gate array. The novelty lies in the integration of nonlinear sliding mode control with a four-phase interleaved boost converter on a field-programmable gate array platform. The suggested control method offers significant robustness in the face of changing load conditions and disturbances with energy-based Lyapunov function to provide a methodical way to analyze and ensure the stability of the closed-loop system. A block of an adaptive delay time is meant to be utilized in a nonlinear sliding mode control system in combination with the traditional sliding mode control, which depends on the chattering removal method. The proposed technique achieves fast convergence and transient responsiveness while reducing the ripple levels in the converter’s input currents and output voltage. In order to facilitate more comparison, a small-signal model-based proportional–integral controller has been developed. The experimental implementation allows for high-speed control and real-time processing, which makes the system appropriate for applications that need accurate and fast power regulation. The efficiency of the suggested control method is shown by the results of experiments and simulations that qualify the system for uses requiring fast and precise power regulation; it has more effective power management than the traditional technique.</p>