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用这款充电芯片,当机器连接标充适配器充电时,打开机器上的打印头进行持续打印,过一段时间发现,关闭打印头后电池充电电流为0mA(这个是偶现的,不是每次都出现),充电器只会给系统供电,重启机器后现象依然存在。
请问是否能提供排查问题的建议?
谢谢!
您好,当时充电没有充饱和,电池电压大概7v左右,电池满电电压大概8.4v,充电电流为0mA可以在打印机运行的时候发现,打印机运行时充电电流有负数有时是正数,而发现充电电流持续一定时间一直是负数时,重启机器再插上充电器会发现充电电流是0mA左右
您好,机器里打印头运行过程中耗电电流是变化的,当打印头耗电电流大于充电电流时,电池会被抽电,充电电流显示为负,当耗电电流小一些时,电池充电,充电电流为正。请帮忙再分析一下其他原因,是否会跟supplement mode有关。
出现充电电流为0mA的情况时,有打印log ,可以看到充电状态寄存器是0x03,是cc mode,充电使能标志位为1,充电器输出限制电流,充电电流,满电电压,设定都是正确的,vbus正确,vbat和vsys数值接近。
只有扣下电池再装回去后,再开机,才能正常充电,请问当充电电流为0mA时,充电芯片是不是进入了特定状态?
您好,现在vsys_min寄存器数值是7.0v,25度温度下电池放电100%对应的ocv电压对应6.8v多一点,会不会是vsys_min引起的,vsys_min是否要再设置小一些?
您好,Can you check all STAT and FLAG register readings? They are located from Reg 0x0B to 0x10. A spike in load(stop printing in your case) may have caused some fault conditions. Information from registers will give us more clue.
Also, when this happens, are you able to re-enable charging in software?
您好,由于是偶现,目前还在复现中。
请问能否大概推断一下charge ic哪方面异常会出现ibat为0mA?每次插上充电器软件都会enable一次charge ic。
您好,我们这边复现了,插着充电器时读取所有寄存器的值如下:
REG0:A0, REG1:4A, REG2:85, REG3:20, REG4:21
REG5:85, REG6:3D, REG7:A, REG8:D, REG9:15
REGa:0, REGb:3, REGc:80, REGd:0, REGe:0
REGf:0, REG10:80, REG11:0, REG12:0, REG13:0
REG14:0, REG15:B0, REG16:0, REG17:0, REG18:85
REG19:0, REG1a:0, REG1b:13, REG1c:6D, REG1d:1A
REG1e:6C, REG1f:1B, REG20:F2, REG21:2, REG22:8
REG23:0, REG24:3B, REG25:11
您好,设置看起来没有问题
However, device was not able to detect VBUS: Reg0C=80 and "Power good" was toggled, REG10=80, meaning some kind power reset was happening. Please check if anything triggered at customer input side, maybe power glitch for example.
建议您安装TI Battery management studio复现一下当时的现象, 手动输入registers的值, This will help expedite the real time debug,
您好,当复现时在串口中将en hiz寄存器设置为1,再设置为0,电流会恢复正常,但过了一会儿充电电流又变为0,多次重复设置1再设置0后,也会过一会儿充电电流变为0mA.
您好,The EN_HIZ bit is cleared automatically when the adapter is plugged in.
请参考数据手册8.3.3.1 Poor Source Qualification确认是不是VBUS OVP引起的EN_HIZ