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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
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我们介绍了一种具有内置VCE(sat)检测和米勒钳位功能以保护IGBT免受过电流损坏的智能栅极驱动光耦(TLP5222,TLP5212,TLP5214A和TLP5214)。VCE(sat)检测电路负责监测IGBT的VCE(sat)电压,如果发现存在过电流的情况即执行光耦输出的软关断。同时向控制器发送故障信号。米勒钳位功能将抑制栅极电位升高和IGBT故障,即绕过IGBT经光耦内部关断接地时产生的米勒电流。TLP5222,TLP5212,TLP5214A和TLP5214还集成了许多其它功能,包括全摆幅电压输出和UVLO功能。减少支持这些功能的外部组件的数量,有助于降低成本和减少PCB的尺寸。
集电极电压由DESAT引脚监测,当功率器件发生过电流时,VCE(sat)升高。当TLP5222,TLP5212,TLP5214A和TLP5214 DESAT引脚电压超过6.5V时,VOUT柔和地变低(软关断),同时向控制器发送故障信号。
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