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HCPL-788J-500E 产品描述
HCPL-788J 隔离放大器专门面向电子电动机驱动中的电流感应应用设计,在典型实现中,电机电流流经外部电阻造成的类比压降通过 HCPL-788J 进行感应,并在 HCPL-788J 光隔离屏障另一端产生正比于电机电流的较大模拟输出电压,可以直接连接到单电源模数转换器,并提供过载输出 (FAULT) 和模拟整流输出 (ABSVAL)。
可以使用 wired-OR 方式连接的过载输出 (FAULT) 可以应用在任何电机相位的快速短路检测,可 wired-OR 的整流输出 (ABSVAL) 则通过执行多相位整流简化电机负载的测量,由于在现今电子驱动电路中共模电压可以在数十 ns 内出现数百 V 的变化,因此 HCPL-788J 在设计上可以承受 10 kV/μs 的超高共模瞬态变化。
HCPL-788J 应用在 EBV 公司电机控制参考设计。
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