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LCD Backlight sits on 2.65V when VCC_SCREEN is off #77

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gardners opened this issue Sep 17, 2022 · 0 comments
Open

LCD Backlight sits on 2.65V when VCC_SCREEN is off #77

gardners opened this issue Sep 17, 2022 · 0 comments

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@gardners
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Not sure how this happens, but EN_BACKLIGHT being asserted when VCC_SCREEN is off still results in a low-level backlight. It might just be backflow from the /SHDN pin from EN_BACKLIGHT partially powering things.

Adding a 1K or 10K resistor in-line between EN_BACKLIGHT and /SHDN should limit the current flow, and thus prevent this?
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@gardners