Two-loop voltage-mode control of coupled inductor step-down buck converter

摘要: A simple two-loop voltage mode control scheme for the two inductor step-down buck converter is proposed. This a voltage-mode in which external sawtooth generator PWM generation not required. The controller implementation requires only single error amplifier and gives almost current-mode performance. proposed lower ripple input current reduces filtering requirements as compared to conventional topology. To reduce even more, integrated magnetic components with steering phenomena are For modelling signal-flow-graph approach developed find open, closed-loop small-signal transfer functions eliminate complexity mathematical analysis. unified model of converter, from complete behaviour can be predetermined, developed. Effectiveness performance improvement demonstrated through simulations. Experimental results load regulation against line changes provided validate scheme.