For high-power quasi-continuous laser drivers, the switched pulse power supply (PPS) is a promising technique due to its higher efficiency when compared with linear drivers. However, there are some digital control challenges with high precision, fast response and zero overshoot during the flat-top current stage. To promote the use of a switched PPS, this paper proposes a digital control strategy based on predictive current control under a multiphase PPS converter circuit. The key of the proposed control strategy is that predictive inner current control is only used for the master phase circuit. Meanwhile, the current sharing control is used for balancing the phase currents, and the setting outer current controller is used for keeping the whole converter control system stable and robust. Furthermore, to obtain fast and precise current tracking, a predictive average current control independent from the load values is derived. Moreover, a reducing gain method is applied to guarantee the stability of the inner current control. When compared with the conventional multiphase control, the proposed strategy possesses a faster dynamic response and a higher accuracy. In addition, it is more flexible under digital control implementation. A 360 W dual-interleaved PPS prototype is utilized for verifying the effectiveness of the proposed control strategy.

对于大功率准连续激光驱动器，由于与线性驱动器相比效率更高，因此开关脉冲电源（PPS）是一种很有前途的技术。但是，在平顶电流阶段，数字控制面临着高精度，快速响应和过冲为零的挑战。为了促进开关式PPS的使用，本文提出了一种基于预测电流控制的多相PPS转换器电路下的数字控制策略。提出的控制策略的关键是预测性内部电流控制仅用于主相电路。同时，均流控制用于平衡相电流，设定外部电流控制器用于保持整个转换器控制系统的稳定和鲁棒性。此外，为了获得快速而精确的电流跟踪，推导出独立于负载值的预测平均电流控制。此外，采用减小增益的方法来保证内部电流控制的稳定性。与传统的多相控制相比，该策略具有更快的动态响应和更高的精度。此外，它在数字控制的实施下更加灵活。使用360 W双交错PPS原型来验证所提出的控制策略的有效性。在数字控制实施下，它更加灵活。使用360 W双交错PPS原型来验证所提出的控制策略的有效性。在数字控制实施下，它更加灵活。使用360 W双交错PPS原型来验证所提出的控制策略的有效性。