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[原创]On SemiNCP517056.6 kW车载充电机SiC解决方案

关键词:汽车电子 车载充电机 SiC模块 On Semi NCP51705

时间:2021-09-09 15:24:53       来源:中电网

On Semi公司的NCP51705主要用来驱动SiC MOSFET晶体管,为了获得最低可能导通损耗,驱动器能向SiC MOSFET器件提供最大可用栅极电压.通过在开通和关断时提供高峰值电流,开关损耗也是最小化.为了提高可靠性,dV/dt免疫性和甚至更快地关断,NCP51705能利用车载充电泵来产生用户可选择的负电源轨.为了完全的兼容性和最小化复杂性,器件还提供外接5V轨,给数字或高速光隔离体的次级边供电.NCP51705还提供重要保护功能如偏压电源的欠压锁住监测和基于驱动电路结温的热关断.器件主要用在驱动SiC MOSFET,工业逆变器,马达驱动以及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,应用电路图以及6.6kW车载充电器SiC模块评估板SEC-6D6KW-OBC-SIC-GEVB主要特性,系统框图,电路图,以及PCB设计图和材料清单.

 

The NCP51705 driver is designed to primarily drive SiC MOSFET transistors. To achieve the lowest possible conduction losses, the driver is capable to deliver the maximum allowable gate voltage to the SiC MOSFET device. By providing high peak current during turn−on and turn−off, switching losses are also minimized. For improved reliability, dV/dt immunity and even faster turn−off, the NCP51705 can utilize its on−board charge pump to generate a user selectable negative voltage rail. For full compatibility and to minimize the complexity of the bias solution in isolated gate drive applications the NCP51705 also provides an externally accessible 5 V rail to power the secondary side of digital or high speed opto isolators. The NCP51705 offers imp..

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