输入通过USB给入5V电源,那么在默认,没有任何配置情况下,不连接锂电池,SYS、BAT输出应为多少呢?
Star Xu:
For no battery condition, the default system voltage will regulate on 7V output. And it is ok to provide system loading without battery.
This part should be controlled by I2C interface but it also works in default mode without host controlled. below table is BQ25882's default mode.
QINGZHI YAO:
回复 Star Xu:
谢谢!可以帮我分析下可能的原因吗?
这是我的设计原理图,焊接了两块板子,两种状况。目前没有接锂电池,图中VBUS=5V,1.8V_IO没接,I2C没控制,默认情况下:
板1: SYS=4.4V左右,BAT电压为0V,TS=0V
板2,SYS=7.2V左右,BAT电压为0V,TS=4.2V
user4998843:
求大神回复