BQ25723: BQ25723在使用时发现REGN输出的电压会超出6V

user1391108

Part Number: BQ25723

使用BQ25723给4串电池进行充电，不插电池时，接入DC电源（24V），REGN输出电压为6V，单独只接电池时（电池电压15V），REGN输出电压为9V左右，DC电源和电池同时在时REGN电压也为9V左右，想知道为什么会出现这样的现象？合理吗？看手册上REGN电压应该是在6V左右。

1 年多前

0 Star Xu 1 年多前

TI__Guru*** 130456 points

您好，请参考下面的schematic checklist 确认电路和layout

0552.BQ2570X_BQ2571X_BQ2572X_BQ2573X_SchematicChecklist.pdf

For layout guidance, please see the following FAQ.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1032723/faq-how-do-i-ensure-the-charger-layout-is-satisfactory-is-there-a-guideline-for-the-buck-boost-charger-controllers-like-bq25713-bq25720-and-bq25730-etc

0 user1391108 1 年多前回复 Star Xu

Prodigy 70 points

原理图和PCB有按checklist检查过

0 Star Xu 1 年多前回复 user1391108

TI__Guru*** 130456 points

您好，正在查看电路，稍后回复。

+1 Star Xu 1 年多前回复 Star Xu

TI__Guru*** 130456 points

您好，There should not be 9V on REGN. I notice that the COMP1 and COMP2 compensation networks are not following the guidelines as specified on the datasheet section 9.3.13. Also, the ILIM_HIZ should be powered from a voltage divider network from VAA, not from REGN. If the REGN still does not show 6V after changing the compensation network, you may need to change the IC.

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BQ25723: BQ25723在使用时发现REGN输出的电压会超出6V