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DRV8705-Q1: MOSFET VDS Overcurrent Protection

Sushma Sharma
Prodigy 20 points
Part Number: DRV8705-Q1

I am working on the simulating and cross verifying the protection features in DRV8705-Q1 . But i am not able to simulate the two condition one for MOSFET VDS Overcurrent Protection & another for Offline Short Circuit and Open Load Detection. So please guide me how to simulate these conditions. 

 

  • 0
    TI__Guru 56650 points

    Sushma,

    What do you mean I am not able to simulate the MOSFET VDS Overcurrent Protection?

    According to datasheet description, "If the voltage across the VDS overcurrent comparator exceeds the VDS_LVL for longer than the tDS_DG time, the DRV8705-Q1 detects a VDS overcurrent condition. The voltage threshold and deglitch time can be adjusted through the VDS_LVL and VDS_DG register settings. Additionally, in independent half-bridge and split HS/LS PWM control (BRG_MODE = 00b, 11b) the device can be configured to disable all half-bridges or only the associated half-bridge in which the fault occurred through the VDS_IND register setting."

    For Offline Short Circuit and Open Load Detection, it is related to the device register setting. I don't have a good thought to simulate it. BTW, we don't have simulation model team to support this requirement right now.