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R7731是高性能、低成本、低啟動電流、電流模式脈寬調製控制器,具有突發三重模式,以便支援綠色節能操作模式。R7731集軟啟動、欠壓鎖定(UVLO)、內部前緣遮蔽 (LEB)、過溫保護(OTP)以及內部斜率補償功能於一體,為用戶提供高效、低外部元件數量和低成本的AC/DC電源應用解決方案。為保護外部功率MOSFET不因電源過電壓而受到損壞,R7731輸出驅動器的電壓被限定在12V。R7731的另一個特點是具備多項保護功能,如超載保護(OLP)和過壓保護(OVP),省略了外部保護電路,確保穩定、可靠地運行。R7731可提供SOT-23-6和DIP-8封裝形式。
超低啟動電流(<30μmA)
10/14V 欠壓鎖定
軟啟動功能
電流模式控制
切換頻率抖動
內部前緣遮蔽
內置斜率補償
突發三重模式脈寬調製支援綠色節能模式
逐週期電流限制
回授迴路開路保護
輸出過電壓保護
過溫保護
超載保護
採用軟盤機動以降低電磁干擾
高抗雜訊能力
光耦合器短路保護
通過RoHS認證,且不含鹵素
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