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BQ25892: question about the charge current

Part Number: BQ25892


Hi team,

     They customer is using the bq25892 and they set the charging current at 5A. They find that the charging current is 5A when the Vsys without load. But the charging current decreases to 4A when Vsys power supply the load(about 1A). In my view, the charger could support total output current is 5A,. When the Vsys could support the load(1A), the charging current could only get 4A(5-1A). Am I right?If not could you please help me to correct it.

yours

nan