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BQ25125: Applying external VCC to Vsys during programming

Part Number: BQ25125

Hi,

Is it safe to use external debugger's VCC to power Vsys during programming while BQ buck output is connected to Vsys? Will this damage the BQ device?  Do I need to have a jumper provision to isolate the BQ charger buck output from the rest of the system if I want to use the external supply during programming?

-Kelvin