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BQ4050: 关于BQ4050的一些设计问题咨询

Part Number: BQ4050


1.BQ4050的设计参考里面有三个按键  Display   ,Shutdown     ,Wave  ,但是我的设计只允许保留一个按键,请问保留哪个按键可以实现充放电MOS管的打开关断,打开的时候怎么保持LED长亮显示。Display要怎么操作,接地还是悬空,相关寄存器里是否有对应的设定呢。

2.还有就是关于芯片CEDV功能需要对电池进行高,中,低三种温度区间的放电,我这里有常温放电设备,但是高低温, 无法实现放电数据的获取,这种情况怎么解决呢。

3.关于芯片的技术手册因为是英文版的,我看没有研究透彻,所以先咨询一下,这个BQ4050充电的时候,LED灯是否可以闪烁提示,充满以后,4灯长亮,是否有这种设定。

  • 您好,

    1,芯片没有wave按键,是wake按键吗?可以取消wake按键, PRES 按键也可以取消

    Please look at the schematic in the bq40z50EVM user's guide. Using multimeter would quickly answer your question that the PACK+ and PRES pins are NOT connected. PRES pin needs to be shorted to PACK- when the removable battery pack is connected to the system. If you don't have this feature configured in your design, you can set DA Configurations [NR] = 1 to bypass this feature.

    2, 需要高中低温才能计算参数.

    3, 可以的,请参考TRM LED Display