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DRV8303: FOC Drive

Prodigy 95 points

Replies: 4

Views: 86

Part Number: DRV8303

Hi

some times our DRV8303 burns at power on or power off. The difference with previous PCB (which works fine) is slight, only place and route, the schematic and BOM are the same. What can I look at ?

best regards

Dominique Houzet

4 Replies

  • Dominique,

    Thanks for posting on the MD forum!

    Do you see any particular section of the device or it's pins getting damaged physically?

    If you remove a damaged device from the PCB and compare it to a new unused device before it has been soldered to a PCB, can you tell me the differences in measurement from each pin to GND?

    This would help us narrow down the issue.

    Also please send a comparison of the two layout files.

    Regards,

    -Adam

  • In reply to Adam Sidelsky:

    we have a ref on the chip: 94AN06TG4

    it burns several times just above the A, and near the right of the 4.

    What value do I have to measure on the pins? Ohm?

    How can I send you files (pcb)?

    best regards

    Dominique

  • In reply to dominique houzet:

    Also, how do we use GATE_CURRENT field? I've first configured 1.7A, then 0.7, it seems that I've less burns with 0.7A!

  • In reply to dominique houzet:

    Dominique,

    Please send an image of the damage.

    Sorry I forgot to mention that we want to see the resistance to GND in the above experiment.

    This gate drive current sets the current driving the FET gates, I would start with lower settings and see if they work for your system without damage or excessive FET heating. 

    Which FETs are you using? 

    You can add me as a friend here and send the files privately.

    Regards,

    -Adam

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