Part Number: DRV3220-Q1
Hi Safety Motor driver team,
I have some question regarding Boost converter diagnostic feature on DRV3220. Pls check and get back to your answer.
How can check Boost converter OC failure condition when the current is over first threshold value with Rboost_Shunt? Customer set 0.45A with Rboost_shunt and want to know how to detect the Boost OC failure condition. Do you think it is not possible to detect the Boost OC with Rboost_shunt?
Customer is concern about No detection during Boost OC is occurred even though failure condition( Boost OC) is happened .
If customer is not use first threshold(without Rboost_shunt), is there any side effect can be occurred when she use Second TH only as internal current limit?
Seems that Boost Converter Over current second threshold value is fixed from 0.6A to 1A. Is the variation of value is depend on device deviation?
I made table as below for Boost converter OV and OC. If there anything wrong or missing, pls correct me right.
Failure condition | Detection | Detection Configurability | Action | |
Boost Converter | Boost output voltage overvotage with respect GND | Configure Boost OV error reporting to ERR pin with CFG4,2(DISBSTOER) | Switching off the internal low side boost FET | |
Over Voltage | 64(Min) 67.5(Typ) 70 V(Max) |
| ||
Boost Converter | First Th | 0.15V/Rboost_shunt | No | Switching off the internal low side boost FET |
Over Current |
| Mando set 0.45A |
| |
| Second TH | 600 to 1000mA | No | Switching off the internal low side boost FET |
| Internal current limit that cannot be adjusted |
| ||
Thanks