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RT9757 是高效率的大電流鋰離子電池充電 IC,它在DIV2 模式下工作時,電池電壓為 4V、充電電流為 2A 時的效率可達 98.2%,最大充電電流可達 7A;它在直通模式下工作時,電池電壓為 4V、充電電流為 1A 時的效率可達 99.1%,最大充電電流可達 5A。它集成有兩組支援直充工作模式、可在不同相位工作的電荷泵分壓電路,具有控制外接過壓保護電路的能力,輸入端含有反向電流阻斷開關,具有兩種調節模式、14 種保護措施、9 種報警信號,能根據 USB BC1.2 的標準和 UFCS 融合快充規範的協定進行埠檢測,其高速類比數位轉換器獲取的輸入、輸出電流、電壓資訊和溫度資訊均可通過 I2C 介面進行上報。建議的接面溫度範圍為-40°C至125°C,而環境溫度範圍則為-40°C至85°C。
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