TL431IDBVR by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。TL431IDBVR Price reference $ 0.110550。TL431IDBVR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information TL431IDBVR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial