LP2904DR by TI Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。LP2904DR Price reference $ 1.340000。LP2904DR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LP2904DR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial