BQ25750EVM: POWER PATH

hi,Ti'friend,

We had some problems when we tested the BQ25750EVM:

1/

When the BAT is  charging and the VSYS is discharging(about >3.2A) simultaneously, then we power off the AC source , the VSYS can not work continuously and the BAT can not discharge(BAT_DRV is not on).

When the BAT is  charging and the VSYS is discharging(<3A) simultaneously, then we power off the AC source , the VSYS can work continuously and the BAT can discharge.

(In this situation, we have modified the VBAT_FB 16.8V, ICHG_PIN 3A, ILIM_PIN 6A,ACUV 25V,ACOV 30V,without HOST),

2/

The ILIM_PIN resistor value is not satisfied with 50/R by default.For example, it's not 6A of current limit when the resistor is 8.2K,but much greater.

It seems  that there is some  Inappropriate control mechanism when switching power path.

Could you give some advice？

Thank you!

Star Xu：

您好，正在查询，稍后回复。

,

Star Xu：

您好，能回答下面2个问题来帮助您调试吗？

1. 您能否提供有关 VSYS 无法连续工作的更多详细信息？

2. 电流限制大多少？可以通过设置IINDPM寄存器来设置输入电流限制吗？

以下是 BQ25750 BQZ 文件，仅供参考

Charger_1_00-bq25750.zip