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BOOSTXL-DRV8305EVM: my own design DRV8305 boostXL circuit does not work

Savas PINAR
Intellectual 270 points
Part Number: BOOSTXL-DRV8305EVM

Hi,

I designed DRV8305 boostxl myself  for using with c2000 piccolo launchpad. But, there is a problem with circuit  because gate drivers do not give proper signals and my motor is not rotating. I check SPI registers in instaSPIN_UNIVERSAL gui. A few error has been shown in register tab. But, I do not understand which interventions correct this errors.  I add the picture in this entry. 

Thanks for help

Savas

  • 0
    TI__Expert 4435 points
    Hello Savas,

    From your picture, it shows you a fault indication (Register 0x01 Bit 10). VDS_STAT monitors overcurrent (Register0x01 bit 5). For register 0x02 shows you have an VDS overcurrent fault in your low side MOSFET A. So I would start by checking SH_A, GL_A, SL_A pins and make sure the connections are correct also your low side MOSFET A is not blown.
    Also, section 7 of the datasheet have the description of status registers. www.ti.com/.../drv8305.pdf
    I hope this helps.