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BQ24171: Test Charging with the Evaluation Module Board

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Part Number:BQ24171

Hello,

I using the evaluation module board to charge three Li-Ion batteries.  The board has three outputs- ground, VBAT, and VSYS.  The VBAT is connected to the charging port on the battery but I don't know where the VSYS goes.  I am only trying to charge the battery.  I was wondering if anyone knows what I need to do with the VSYS output of the board; does it also go to the charging port of the battery or is just not connected to anything?  What is the function of VSYS?  Thank you. 


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