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DRV2700:  DRV2700：The DRV2700 boost board is not functioning

Xiang Mianyi
Prodigy 10 points
Part Number: DRV2700

Hello, I'm using the DRV2700 chip and designed a boost power supply PCB to elevate the voltage to 500V based on the boost circuit in the chip manual. After soldering, I found that without inputting a signal, the output voltage is only a few volts. However, it is increasing very, very slowly, and it is far from reaching the desired 500V. Could you please tell me if there is an issue with my circuit?

  • TI__Genius 17580 points

    Hello,

    I am not noticing anything wrong with you circuit, it is very similar to our EVM. Can you provide the position of jumpers J1, J2, J4, and J5 that you are testing with?

    Regards,
    Sydney Northcutt 

  • in reply to Sydney Northcutt
    Prodigy 10 points

    Thank you for your help! As you can see, my J1, J2, J4, J5 are used to replace SW1 and SW2 in the EVM. In my test, I didn't use jumpers to connect them, and I know that's not right, but it shouldn't have no output at all. Do you know what to pay attention to when soldering the chip? I suspect that the chip is broken.

  • in reply to Xiang Mianyi
    TI__Genius 17580 points

    Hello,

    Are you not getting an output at all or are you getting a few volts? What value are you using for VDRV? I recommend placing jumpers on the equivalents of SW1 and SW2 to replicate one of the scenarios of the EVM. Having your jumpers open alters the feedback voltage fed back to the device, which can alter operation. From here we can better determine the chip is damaged. For soldering, I would double check the connection of all the pins and ensure no pins were bridged. 

    Regards,
    Sydney Northcutt