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RT9554A 的設計目標是過流檢測。電流流經 CSP 和 CSN 之間的電阻形成的電壓被放大 200 倍後與 BAT_REF 端的電壓進行比較,檢查其是否發生了過流狀況。RT9554A 還為其用戶準備了一個比較器,它的兩個輸入端分別名為 AC_REAL 和 AC_REF。FLAG 是一個輸出端,它是開漏配置的,使用者可在它和某個電源之間連接一隻電阻,一旦過流狀況發生,或是 AC_REAL 端的電壓高於 AC_REF 端的電壓,FLAG 即被拉低。RT9554A 的封裝是 WDFN-8L 2x2。
共模輸入電壓最高可達 24V
VCC 工作電流:200μA
VCC 關機電流:5μA(在 S3/S4/S5 狀態下)
可程式設計過流閾值
過流保護發生時FLAG 變為低電平
符合 RoHS 規範,不含鹵素
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