load switch indicator dimly illuminated

greatfet-hardware / jasmine

a lithium polymer battery charging neighbor

BSD 3-Clause "New" or "Revised" License

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load switch indicator dimly illuminated #5

Open mossmann opened 5 years ago

mossmann commented 5 years ago

D4 is dimly lit when Jasmine is charging with load switch SW1 turned off. This happens when charging from Azalea's USB port but not when charging from Jasmine's USB port. I assume this is due to reverse leakage through D2, but that would be good to test.

mossmann commented 5 years ago

If this issue persists with D2 removed, it might be caused by leakage from VBAT.

yhetti commented 4 years ago

Hopefully this will be fixed by adding the LDO. (issue #15)

mossmann commented 4 years ago

We measured current through LED at 0.5 mA (rev3). Raising the forward voltage of the LED by changing it from red to yellow or green may help.

mossmann commented 4 years ago

Removing D2 did stop D4 from turning on dimly, so this seems to be caused by reverse leakage through D2.