SilabsSi828x系列集成DC／DC转换器SiC FET驱动器解决方案

Silabs公司的Si828x系列(Si8281/82/83/84)组合了隔离大电流栅极驱动器和集成了系统安全性和反馈功能.该系列产品非常适合驱动逆变器和马达控制应用中所用的碳化硅(SiC) FET,功率MOSFET和IGBT.Si828x系列隔离栅极驱动器采用Silicon Labs公司的专有的硅隔离技术,支持耐受电压高达5.0 kVrmper UL1577.这种技术具有高性能的随温度和老化的性能变差会减少,部件间一致性更好,和其它隔离栅极驱动器相比有更好的共模抑制比.在故障条件下软关断,短路保护超快保护<< 1 μs,高CMTI 25 kV/μs,30V驱动器侧电源30V,集成了米勒箝位和互补驱动器控制输入,DC/DC转换器效率83%,关断,频率和软起动控制,可提供汽车级OPN,支持PPAP文件,AEC-Q100规范,支持IMDS和CAMDS列表,工作温度–40 到 125 C.主要用在工业应用如SiC/IGBT/ MOSFET栅极驱动,工业和再生能源逆变器,AC,无刷和DC马达控制,变速马达控制器,隔离开关电源,以及汽车应用如混合动力和电动汽车,动力逆变器,车载充电器,感应充电器和DC/DC转换器.本文介绍了Si8281/82/83/84主要特性,简化通路框图和应用电路,配置电路,测量电路和评估板Si828x-HB-EVB主要特性,电路图,材料清单.

The Si828x family (Si8281/82/83/84) is comprised of isolated, high-current gate drivers with integratedsystem safety and feedback functions. These devices are ideal for driving SiliconCarbide (SiC) FETs, power MOSFETs, and IGBTs used in a wide variety of inverter and motorcontrol applications. The Si828x isolated gate drivers utilize Silicon Labs proprietary siliconisolation technology, supporting up to 5.0 kVrms withstand voltage per UL1577. This technologyenables higher-performance, reduced variation with temperature and age, tighter part-topartmatching, and superior common-mode rejection compared to other isolated gate drivertechnologies.

In addition to the gate driver, the Si828x family integrates a dc-dc controller for simple implementationof an isolated supply for the driver side. The Si828x dc-dc controller can be orderedin two different configurations depending on what system voltage rails are available and theamount of power needed. The Si8281 and Si8283 have integrated power switches but arelimited in...