BQ78350-R1: 无法正常控制充放电

您好，您的fuse pin是否使用，如果保险丝触发，可能会禁用 FET。 请将保险丝引脚连接到 GND。

您好，The use of an activated fuse is apparently more system dependent for the higher cell count designs where the BQ78350-R1 is used.  SAFE can be used to activate a fuse as noted in the data sheet section 8.3.2. That is interesting that we don't seem to have an example showing SAFE used to blow a fuse.  SAFE could be used either with or without a secondary protector.  The closest example which comes to mind would be http://www.ti.com/lit/pdf/sluuav7 section 5.2 schematic, although note the voltage limits of the BQ78350-R1 SAFE pin which is an output only.  The FET must handle the system voltage and the current to activate the fuse, but also have a low enough VGSth to be turned on by the SAFE output high level and any components in series.  Sometimes separate FETs are used for the gauge and protector.

请参考TRM 4.3 Enabling Use of the SAFE Pin