TI中文支持网Part Number:BQ76952
The following are the settings related to OCD:
"Protections","OCD1","Threshold","8","mV"
"Protections","OCD1","Delay","1","3.3 ms"
"Protections","OCD2","Threshold","10","mV"
"Protections","OCD2","Delay","7","3.3 ms"
"Protections","SCD","Threshold","0","—"
"Protections","SCD","Delay","15","µs"
"Protections","SCD","Recovery Time","5","s"
"Protections","OCD3","Threshold","-4000","userA"
"Protections","OCD3","Delay","2","s"
"Protections","OCD","Recovery Threshold","200","mA"
"Protections","OCDL","Latch Limit","0","—"
"Protections","OCDL","Counter Dec Delay","10","s"
"Protections","OCDL","Recovery Time","15","s"
"Protections","OCDL","Recovery Threshold","200","mA"
"Protections","SCDL","Latch Limit","0","—"
"Protections","SCDL","Counter Dec Delay","10","s"
"Protections","SCDL","Recovery Time","15","s"
"Protections","SCDL","Recovery Threshold","200","mA"
Under this setting, work is normal.
After OCD protection, DSG and CHG, DDSG and DCHG will indeed turn off DFET and CFET.
Our question is: the way to recover.
According to the setting, 200mA charging is required before it can be released; we hope there are other ways to release it; for example, when OCD occurs, it will be released automatically after a period of time.
After studying OCDL, I think the action method is:
"Protections","OCDL","Latch Limit","2","—"
Set the number of occurrences of OCD; the number is 2.
"Protections","OCDL","Counter Dec Delay","10","s"
Set the interval between each occurrence to ten seconds
"Protections","OCDL","Recovery Time","15","s"
Set the interval time. Recovery time takes fifteen seconds
"Protections","OCDL","Recovery Threshold","200","mA"
When OCD occurs twice, the system will shut down and must be charged at 200mA before it can be restored.
Is this logic correct?
Star Xu：
您好，正在查询，稍后回复。
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Ethan Yang：
I did a test：
"Protections","OCD","Recovery Threshold","0","mA""Protections","OCDL","Latch Limit","2","—""Protections","OCDL","Counter Dec Delay","10","s""Protections","OCDL","Recovery Time","15","s""Protections","OCDL","Recovery Threshold","0","mA"
Such a setting can indeed be restored without charging; but the state we want is:
When OCD occurs => wait five seconds => shut down
Load relief => wait five seconds => turn on
Do I need to make any settings?
,
Star Xu：
您好，已经在E2E英文论坛发帖，请继续关注。
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1290341/bq76952-bq76952-ocd-recover-query
