AOZ7111AI是一款工作在臨界模式的功率因數校正電路控制晶片。應用在Boost模式PFC電路。傳統的電流模式的CRM PFC需要從AC交流線採樣，而AOZ7111AI則不需要，因而進一步降低了採樣電路的功率損耗，有利於系統低待機功耗設計。AOZ7111AI內部集成了大量電路，從而最大限量地減少了週邊電路器件的數量。同時，AOZ7111AI取消了ZCD採樣，不需要過零檢測，減低了PFC電感的複雜程度。具有過壓保護電路，欠壓保護和過流保護等保護電路。
►場景應用圖
►展示板照片
►方案方塊圖
►核心技術優勢
●實現功率因數校正，降低系統THD值 ●降低系統EMI ●Max Frequency：350KHz ●internal soft-start function
►方案規格
● No AC input voltage sensing requirement ● AC Fault Detect™ makes system more robust ● Maximum switching frequency limitation ● Additional OVP detection pin ● Output over-voltage / open-feedback protection and disable function ● Internal closed loop soft-start ● Dynamic OVP function ● Non-linear gain error amplifier enable fast line and load transient response ● No need for the auxiliary winding with minus current detection (ZCD) ● 150μs internal start-up timer ● MOSFET over-current protection and inductor saturation protection ● Under-voltage lockout with hysteresis ● Lower startup and operating current ● +300mA / -800mA peak gate drive current ● Thermal shutdown ● SO-8 package