四模块并联交错大功率激光驱动电源研制

根据高功率半导体激光器对大功率、低纹波、高可靠性恒流源驱动源的需求，设计了基于4个BUCK模块并联交错输出的恒流电源，最大输出功率37.5 kW（250 V×150 A）。4个模块导通时间依次间隔T/4使模块间的纹波抵消降低，实现输出电流纹波率0.066%。利用FPGA并行优势快速响应输出保护，在12.2 μs内即可关断输出，保护优异。测试结果验证了设计，目前已成功应用于某项目中。

Design of four-module parallel interleaved high power laser driver

According to the demand of high power semiconductor laser for high power, low ripple and high reliability constant current driver, a constant current power supply based on four BUCK modules in parallel is designed. The maximum output power is 37.5 kW (250 V×150 A). The conduction time interval of the four modules is T/4 in turn, which weakens the ripple by cancellation between the modules and achieves the output current ripple rate of 0.066%. Using the parallel advantage of FPGA, it can quickly respond to the output protection, and turn off the output within 12.2 μs, so the protection is excellent. The experimental results verify the design, which has been successfully applied in a project.