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    T113 MQ-R接7寸LCD遇到的问题

    D1系列-RISC-V
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      chzfmx LV 4 last edited by

      手头有一块T113-MQ-R和一块7寸LCD屏(1024*600),买了一块40pin转50pin的驱动板,能成功点亮显示屏
      3479b5fa-9b3e-4148-b082-e881ebf2d12b-image.png
      但发现MQ-R发热严重,排查后发现是背光驱动电路中的电感L4发烫
      998d659a-7c00-470d-ad75-97d899381199-image.png
      查了下屏的参数,背光电流要200mA
      4d0b114b-098c-4bb4-860c-851f09bc8698-image.png
      然后MT9284-28J的Vfb = 104mV
      71d6bbb3-e3af-44c0-81e5-0a33720504a7-image.png
      我是只需要调整R4的阻值呢还是需要更换驱动芯片,L4(10uH)电感是否需要跟换?
      4d81a68e-a89a-4a8c-8a64-49533cb8ddd4-image.png

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