AXP192 does not always start when power is applied

Xinyuan-LilyGO / LilyGo-T-PCIE

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AXP192 does not always start when power is applied #12

Open Flyua opened 3 years ago

Flyua commented 3 years ago

LilyGo-T-PCIE built-in Cell Li-Battery and Power System Management IC AXP192 often does not start correctly due to the operation of its built-in protection at the adapter and USB VBUS inputs.

LilyGO commented 3 years ago

Can you describe in detail what happens when it doesn't work? Do you have a video

star297 commented 2 years ago

We added a resistor (470R) in position R28 (it's not fitted) to VINT pin. That worked for us, can be intermittent not stating when applying power via USB or 5v-IN. Had a couple of boards with this problem, might be an idea for LilyGO to fit the resistor during production.