Supplementary power supply circuit

The utility model provides a supplementary power supply circuit, including a plurality of level converter, just a plurality of level converter's power supply input terminal is connected to low -voltage storage battery 's confession electrical output respectively, at least one level converter among a plurality of level converter has the isolation output, just at least one level converter among a plurality of level converter has non - isolation output. The utility model discloses a direct power supply output voltage with low -voltage storage battery of a plurality of level converter transfers toand keeps apart output power supply and non - isolation output power supply, and not only the power framework is efficient, can reduce the volume of product in addition. 本实用新型提供了种辅助供电电源电路，包括多个电平变换器，且所述多个电平变换器的供电输入端分别连接到低压蓄电池的供电输出端；所述多个电平变换器中的至少个电平变换器具有隔离输出端，且所述多个电平变换器中的至少个电平变换器具有非隔离输出端。本实用新型通过多个电平变换器直接将低压蓄电池的供电输出电压转为隔离输出供电电源和非隔离输出供电电源，不仅电源架构的效率高，而且可减小产品的体积。