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BQ40Z50-R1: BQ40Z50SHUTDOWN问题

Part Number: BQ40Z50-R1
Other Parts Discussed in Thread: BQ40Z50

bq40z50进入SHUTDOWN时间最快是多久?我把SHUTDOWN时间和MOS OFF TIME都设置成1S,但是在MOS关闭后状态位置位需要6S,在状态位不置位的情况下,即使插入充电器也无法激活,请问这现象正常吗?

  • 如果这个问题不好回答的话,请帮忙确认SHUTDOWN模式最短可以多少S进入,目前我把时间设置到最短都要6S

  • 您好,

    If there is voltage on PACK pin the gauge will stay awake, I'm not sure the type of charger being used or what voltage it applies to the PACK+/- on the gauge.

    It's not recommended to set both the shutdown time and FET off time to the same value, you want the voltage on the PACK pin to be lower than the shutdown threshold otherwise it will not go to shutdown.

  • 但是目前的情况是即使我把SHUTDOWN时间设置成1S后,也需要6S后充电才能激活。在进入SHUTDOWN的过程中即使插入充电器,SHUTDOWN的动作还是会完成,这是不能充电,需要把充电器拔出,重新插上才能激活,这种情况怎么解决。就是说芯片在接受到SHUTDOWN命令后知道SHUTDOWN动作完成电池状态更新的这大概5S时间内,我插入充电器没有用,还是会进

  • 但是目前的情况是即使我把SHUTDOWN时间设置成1S后,也需要6S后充电才能激活。在进入SHUTDOWN的过程中即使插入充电器,SHUTDOWN的动作还是会完成,这是不能充电,需要把充电器拔出,重新插上才能激活,这种情况怎么解决。就是说芯片在接受到SHUTDOWN命令后知道SHUTDOWN动作完成电池状态更新的这大概5S时间内,我插入充电器没有用,还是会进

  • 我用的适配器是16V的电压

  • 您好,把您的gg文件发过来看一下。

  • 现在最大的问题是在IC接收到SHUTDOWN命令并开始执行后,直到执行完成这段时间大概要5S钟,如果客户在这5S钟插入适配器充电就没法激活,理解我的意思吗

  • 您好,正在跟TI工程师确认,稍后回复。

  • 您好,Is this when the execute the command twice to immediately enter shutdown? OR with the shutdown delays? Please check to see if sending the command multiple times speeds up the sequence. Also ensure that the voltage on the PACK pin is below the Vstartup threshold and charger present threshold to make sure the gauge will go to shutdown faster.

  • 你所说的意思是在SHUTDOWN时间还没有到的情况下插入充电器充电会取消休眠,这个实测是没有问题的。我说的是在SHUTDOWN时间到了以后,直到电池状态全部置位这段时间内插入充电器不会休眠,因为你们的IC已经在执行了。而且这个执行的时间有5S钟,(如视频,1S后SHUTDOWN动作已经在进行了,但是直到6S后电池状态才置位),在这段时间内插入充电器是不会进入休眠的,你们有没有实测过啊?

  • 您好,

    How you you actually determining the 6 second delay? Just by checking the register may not be a good method since there are delays within the GUI to display, you should look at power consumption of the gauge if possible.

    I don't believe the gauge will be able to enter shutdown mode in 1s, it will most likely take at least 2-3s in order to fully shutdown after the command is received.

    The gauge will remain active after the command is sent and the voltage is high on PACK, if you remove the voltage on PACK it will then go to shutdown, it is essentially waiting for the conditions to be valid.

  • I don't believe the gauge will be able to enter shutdown mode in 1s, it will most likely take at least 2-3s in order to fully shutdown after the command is received.   其实你这句话作为解释就已经足够了,意思就是哪怕我把SHUTDOWN时间设置成1S,电量计要完全关闭也至少要3S,实测是5S.所以在电量计动作的这段时间5S内即使插入充电器也无法激活是因为你的SHUTDOWN命令在执行,执行时间要5S钟,这是这颗IC本身的特性,我的理解对吗?

  • 您好,是的, 芯片最少需要2-3S进入shutdown 模式。