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。

3 个月前

0 Star Xu 3 个月前

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 3 个月前回复 Star Xu

Prodigy 60 points

原理图和PCB有按checklist检查过

0 Star Xu 3 个月前回复 user1391108

TI__Guru*** 130456 points

您好，正在查看电路，稍后回复。

+1 Star Xu 3 个月前回复 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.

电源管理

电源管理论坛

BQ25723: BQ25723在使用时发现REGN输出的电压会超出6V