Weight Judgement Based Thermal Balancing Strategy for Interleaved Buck Converters

The multi-phase parallel converter is widely employed in low-voltage, high-current applications, such as voltage regulator modules. In a multi-phase system, the phase current consistency affects the output characteristics, while the heat distribution in each module influences system stability. However, the realization of thermal balance inevitably affects current sharing. To address this issue, this paper proposes a strategy to optimize the weight distribution of thermal balance and current sharing to alleviate the current mismatch in thermal balancing control. Simulation and experiment results verify that the proposed strategy can balance the temperatures of semiconductors, and squeeze the current difference simultaneously. This makes active thermal control more suitable for low-voltage, high-current applications.