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RT8470 是高效率的連續模式開關降壓型轉換器,設計用於在電源電壓高於 LED 電壓的情況下驅動單只或多隻串聯連接的 LED 。其工作電壓範圍是 7V~30V,採用磁滯控制模式,使用高端電流設定電阻設定輸出電流大小。 RT8470 集成了功率開關和高端電流檢測電路,可用 PWM 信號或類比信號實現 PWM 調光輸出實現 LED 亮度控制。RT8470 採用小型 TSOT-23-5 封裝和熱強化的 SOP-8(含散熱焊盤)封裝。
7V~30V 輸入電壓範圍
高端電流檢測,磁滯控制架構
內部集成 350mΩ N-MOSFET
1A 電流輸出能力(TSOT-23-5 封裝適用)
1.2A 電流輸出能力(SOP-8(含散熱焊盤)適用)
高達 97% 的效率
LED 電流精度:±5% (典型值)
類比或 PWM 信號調光
300Hz 內置斜坡信號發生器
輸入欠壓鎖定
熱關機保護
符合 RoHS 規範,不含鹵素
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