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CSD88599Q5DC: For designs using the 60-V three-phase smart gate driver DRV8320SRHBR, only one current sense resistor RCS can be placed between common source terminals for all three power block devices CSD88599Q5DC to PGND

bianshuai
Prodigy 40 points
Part Number: CSD88599Q5DC
Other Parts Discussed in Thread: DRV8320

我想利用DRV8320H和CSD88599设计驱动电机，但我看CSD88599数据手册时在Layout Guidelines处有如下一段话，我想知道为什么DRV8320SRHBR只能有一个测量电阻，而DRV8323RSRGZT 可以用三个测量电阻

  • For designs using the 60-V three-phase smart gate driver DRV8320SRHBR, only one current sense resistor RCS can be placed between common source terminals for all three power block devices CSD88599Q5DC to PGND。
  • For designs using the 60-V three-phase gate driver DRV8323RSRGZT, three current sense resistors RCS1, RCS2, and RCS3 can be used between each CSD88599Q5DC source terminals to GND. 谢谢
  • 0
    TI__Genius 12231 points

    Hi Bianshuai, 

    Thank you for your question and using our forum! 

    I will look into these differences and documentation and aim to give a response next week. 

    Thank You and Best Regards,

    -Joshua

  • 0 in reply to Joshua Maize
    TI__Genius 12231 points

    Hi Bianshuai, 

    So sorry for the long delay.

    The DRV8323RS has three internal CSAs and can have three different external sense resistors. However, the DRV8320 does not have internal CSAs and must use one sense resistor (or effective parallel combination) instead with an external CSA if desired.

    Please let me know if I can clarify anything further.

    Best Regards,

    -Joshua