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DRV8313: DRV8313 not working

Steven T
Prodigy 10 points
Part Number: DRV8313

Hi,

I have connected DRV8313 exactly as in the data sheet 8.2.1 figure 13.

www.ti.com/.../drv8313.pdf

as soon as turning power supply the current limiter of the power supply turns on (limited to 2A)

then the chip seems to be damaged. Some pins that were not shorted to each other are now shorted to each other

1) prototyping with SSOP28 to DIP expansion board then onto breadboard. The soldering should be fine i went through numerous boards and each time i more than triple check every solder connection using multimeter

2) using 5V arduino as microprocessor but the datasheet section 6.3 says the Vin can be max 5.5V

3) using leds with 220R's as load

Please help!! have already spent many days, tried different schematics and went through many, many chips :(

  • 0
    TI__Expert 4435 points

    Hi Steven,

    The figure shown in the datasheet is for a typical three phase motor configuration without current limit.

    To start debugging, please lower the current limit of you power supply to the milliamp range and see if you power supply is still dropping. This will avoid damaging more parts and can give you a clue if there is a short elsewhere on your design.

    If you are able to power up your device at lower voltage and current then please monitor the nFAULT, and VCP pin when the device is being enabled.

    Also, have you considered start evaluating with our DRV8313 EVM? This evaluation module comes with a downloadable GUI for simpler operation. You could start there and then adjust as your design requires.

    Thank you.

  • 0 in reply to Luis Riveros
    TI__Expert 4435 points
    Hi Steven,
    Have you solved your issue? I haven't heard from you so I assume you are good to go now. I will close this thread but please feel free to re post or create a new thread. Thank you.