We have the same doubts about Bq76952&Bq76942：
Now we're using load detect to recover SCDL to avoid short circuit again at the instant of short circuit recovery.When we removed load,SCDL recovered immediately without manual described SCDL Count Dec Delay time.Then we can not avoid short circuit again the moment SCD is recovered. Since we do not accept SCDL recover from charge,I hope to receive your guidance，thanks!
Hello Xiaojuan,
It seems you misunderstood what Count Dec Delay time does. SCDL Count Dec Delay time only affects before SCDL triggers.
For example: If SCD triggers, the SCDL Latch counter increases by 1 from 0 to 1. Now, SCDL Count Dec Delay starts. If an SCD event happens again before this timer finishes, then SCDL Latch counter increases to 2... Now, if a time passes that is longer than Count Dec Delay without any SCD events, then the SCDL latch counter decreases by 1. So if the counter was at 2, it will decrease to 1.
You have a SCDL Latch Limit of 1. This means that SCDL will trigger immediately after a SCD event. So if you have load detect recovery, removing the load will immediately recover the device.
The behavior is described here in the TRM.
The device can also recover from SCDL when the load is removed, or if charging current is detected, or after a programmable time, or the host sends a 0x009C SCDL_RECOVER() subcommand.
Hope this helped.
Best Regards,
Luis Hernandez Salomon
Thank u for your reply.If it means that after SCDL recovered from load detect ,SCDL counter is still 1 for Count Dec Delay time?And counter=1 during this period of time will not trip SCDL again?
