Part Number:BQ27426
TI的工程师,您好!
我司项目中,在使用BQ27426时,关于Average Current/power Last Run 寄存器和Delta Voltage 寄存器的初始化配置,有些疑问:
1、Average Current/power Last Run 寄存器
根据手册描述,这两个寄存器用于每个放电周期的平均电流和平均功率的存储,当放电持续500秒并停止后,gauge会对其进行更新,初始化配置时,建议使用默认值(默认值表示C/5负载);
根据手册的描述,默认值表示的是C/5负载,当实际负载与默认负载不匹配时,怎样进行调整该寄存器的值?
使用过程中,用户是否可以通过读取这两个寄存器的值,查看之前的放电情况?
如果,用户软件有错误操作,对这两个寄存器写入了非法值,会导致什么后果?
2、Delta Voltage 寄存器
Delta Voltage,该参数的作用是什么?在使用中,该寄存器的配置与Min Delta Voltage、Max Delta Voltage寄存器是什么关系?为什么?
谢谢!
Star Xu:
您好
1,请参考下面帖子的内容,帮助理解Average Current/Power Last Run regs
Avg I/P Last Run is taken over the full discharge period. I do not think it has a fixed average duration. Anytime the gauge switches into DSG mode the average current for the discharge is being measured, when the DSG mode is exited the gauge takes the average from when DSG mode was entered until the DSG mode was exited.
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1193392/bq27426-bq27426-avg-i-last-run-question
2, Delta Voltage是典型值,Minimum Delta Voltage, Maximum Delta Voltage是范围。
请参考TRM 49页的介绍。The gauge will automatically learn the load spikes characteristic of the system during operation and store it in Delta Voltage, thereby adding margin to capacity predictions when necessary.
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xianzhen cao:
ok,thanks!