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DRV8302: No gate output even when all regulators are working fine

Rishav Guha
Prodigy 40 points
Part Number: DRV8302

I have made a breakout board for DRV8302 and have connected it on a breadboard according to the following schematic:

Circuit.pdf

After powering up the DRV8302 with a 24V supply and putting 5V on EN_GATE pin, I see 10.8V on GVDD, 6.7V on AVDD pin and 3,3V on DVDD pin. nFAULT pin shows 2.5V and nOCTW pin shows 4.8V. However, all GH_x and GL_x pins show 0V even when I apply 5V on the corresponding INH_X and INL_x pins. What might be the problem? Also I have checked by disabling the buck converter and overcurrent protection, nothing changes.

  • 0
    TI__Expert 4435 points
    Hi Rishav,

    How are you measure those pins? can you check them under a scope? There is a power sequence that needs to be followed for this device. Please check section 7.4 in the datasheet.
    Also how are the connections on your circuit? Can you share a picture of your set up? Thanks.