On Semi NCP51705 6A高速SiC MOSFET驱动方案
On Semi公司的NCP51705驱动器是设计用来驱动SiC MOSFET晶体管,为了得到尽可能低导通损耗,驱动器能驱动SiC MOSFET器件的最大可允许栅极电压,源电流和沉电流为6A,并提供重要的保护功能如基本电源的欠压锁住监视和基于驱动电路的结温的热关断,主要用在驱动SiC MOSFET晶体管,工业逆变器,马达驱动和PFC,AC／DC转换器和DC／DC转换器.本文介绍了NCP51705主要特性,内部框图,低边开关配置图和应用电路,以及NCP51705 Mini 评估板和NCP51705 Mini SMD评估板主要特性,电路图,材料清单和PCB设计图.
The NCP51705 driver is designed to primarily drive SiC MOSFETtransistors. To achieve the lowest possible conduction losses, thedriver is capable to deliver the maximum allowable gate voltage to theSiC MOSFET device. By providing high peak current during turn−onand turn−off, switching losses are also minimized. For improvedreliability, dV／dt immunity and even faster turn−off, the NCP51705can utilize its on−board charge pump to generate a user selectablenegative voltage rail.
For full compatibility and to minimize the complexity of the biassolution in isolated gate drive applications the NCP51705 alsoprovides an externally accessible 5 V rail to power the secondary sideof digital or high speed opto isolators.
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