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Part Number: BQ24610
Dear experts,I have a question about bq24610's Dynamic Power Management. If I use the bq24610's ACSET Pin to set the total load current as 4A, what will happen when the total current exceed 4A? The bq24610 will limit the input current from external Adapter? When the system load draw 5A, the bq24610 charging current will reduce to 0A and the input current from external Adapter will keep under 4A? Or, the bq24610 charging current will reduce to 0A and the input current from external Adapter will equal to 5A?The bq24610 has current limit functiom? Thanks.
If IADAPTER_LIMIT is set to 4A, then the maximum adapter current can supply to the system is 4A.
When the system will not able to get 5A as the IINDPM loop clamps the input current at 4A.
Application Engineer, Battery Charging Products
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In reply to Jing Zou:
Dear Jing, you mean that bq24610 has current limit function? If ACSET(Adapter current-set input) Pin set as 4A level, bq24610 will not draw more than 4A from external DC Adapter? In other words, when the system draw 4A load current, the battery charging current will reduce to 0A? Thanks.
In reply to Jason Hu27:
Yes. Your understanding is correct.
Dear Jing, does bq24610 use ACDRV Pin to achieve current limit function? When system current exceed 4A, ACDRV Pin will control Q1 and Q2 PMOS to limit the total current from the external DC Adapter? In other words, Q1 and Q2 PMOS just like stopcocks. When the system current exceed 4A, Q1 and Q2 PMOS will adjust the current that can be passed. Thanks.
Dear Jing, my system load is an DC motor. The power source of my system is a Li-iron battery(4 series, 16V). It can supply max. 4A. When bq24610 is in charging mode, the charging current is 1.5A. If my system load (DC motor) satrts at this time, maybe it will draw more than 4A current(Motor overload). In this condition, I want to make sure that bq24610 has current limit function. I can accept the charging is stoped when the system current exceeds the bq24610's DPM current setting. But the system current must be limited to 4A, and it can not be turned off by bq24610. When the system load current is reduced to under 4A, the bq24610 must be automatically restored charging action. Best regards.
Thanks for the explanation. The bq24610 will limit the current at 4A at the input of the charger even when system tries to draw more than 4A.
Dear Jing, Thanks for your support.
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