TI中文支持网因为我设计了一个变色灯的电路,正常使用时都没有问题,但是当关机状态下(关机状态下也是插着电池的),SW也是有输出的,因为我的STAT状态管脚上拉接的是VSYS,会导致变色灯电路的三极管导通,一直耗电,查了下规格书应该是8.4.2部分的内容,已复制过来,请问是否有解决方法?
8.4.2 Device Power Up from Battery without input Source
If only battery is present and the voltage is above depletion threshold (VBAT_DPL_RISE), the BATFET turns on and
connects battery to system. The REGN stays off to minimize the quiescent current. The low RDSON of BATFET
and the low quiescent current on BAT minimize the conduction loss and maximize the battery run time.
The device always monitors the discharge current through BATFET (Supplement Mode). When the system is
overloaded or shorted (IBAT > IBATFET_OCP), the device turns off BATFET immediately and set BATFET_DIS bit to
indicate BATFET is disabled until the input source plugs in again or one of the methods described in BATFET
Enable (Exit Shipping Mode) is applied to re-enable BATFET.
user4377578：
查了下规格书,如果STAT管脚接REGN管脚似乎可以,不知是否会有什么隐患?
Annie Liu：
回复 user4377578:
基于您的描述，若没有AC适配器，您是否需要电池与SYS完全断开连接？
仅电池供电时，您的主机是否还能运转？I2C接口也可在仅电池供电状态下工作吗？
Johnsin Tao：
回复 Annie Liu:
Hi SYS电压此时来自电池，看一下关掉电池chargepump MOS是否可以断开与SYS的通路。如果充电MOS 有体二极管无法关掉，那么你只能在SYS与你的LED控制电路上增加开关电路。
