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RT9538 是開關模式的電池充電控制器,可對單節或多節鋰離子電池、鎳氫電池和鎳鎘電池進行定電流或恒壓充電。其最大充電電流可用外部電阻進行設定,固定輸出電壓最高可達 30V,精度為 0.5%。另有第三個控制回路可對來自電源轉接器的輸入電流進行限制,這可保證讓系統持續工作的同時還能讓電池以最高速率進行充電,但卻不會超出電源供應器的能力。RT9538 可以低達 2V 的壓差對 2.5V~25V 的電池進行充電,它在輸入電源被移除後即自動進入睡眠模式,電流消耗僅有 10μA,無需使用二極體與電池進行串聯。當充電電流下降至額定充電電流的 20% 以下時,一個邏輯信號輸出指示電池已充滿。
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