With the rapid development of core industries such as AI data centers, photovoltaic energy storage, and rail transportation, the voltage withstand and efficiency requirements of SiC (Silicon Carbide) devices continue to rise. The voltage rating of SiC devices has gradually increased from the traditional 650 V to 1200 V, and is even moving toward the high-end 1700 V range. Correspondingly, the reliability test voltages for SiC devices are also being raised, creating an urgent market demand for high-voltage precision DC power supplies—a critical technological breakthrough driving the advancement of the SiC industry.