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RT9554A 的设计目标是过流检测。电流流经 CSP 和 CSN 之间的电阻形成的电压被放大 200 倍后与 BAT_REF 端的电压进行比较,检查其是否发生了过流状况。RT9554A 还为其用户准备了一个比较器,它的两个输入端分别名为 AC_REAL 和 AC_REF。FLAG 是一个输出端,它是开漏配置的,用户可在它和某个电源之间连接一只电阻,一旦过流状况发生,或是 AC_REAL 端的电压高于 AC_REF 端的电压,FLAG 即被拉低。RT9554A 的封装是 WDFN-8L 2x2。
共模输入电压最高可达 24V
VCC 工作电流:200μA
VCC 关机电流:5μA(在 S3/S4/S5 状态下)
可编程过流阈值
过流保护发生时FLAG 变为低电平
符合 RoHS 规范,不含卤素
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