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LMG3411R070: Short circuit protection

Part Number: LMG3411R070

Dear team, 

My customer are trying to find solution for short circuit protection. 

Can  LMG3411R070 be used like e-fuse or hot swap device? In case of e-fuse device, There is no solutions to support continuous voltage >80V. 

- Typ 80V/ 6A  system. 

For LMG3411R070, current fault trip point is typ 36A, Is this value a OCP threshold?  Is there other device having lower trip point or adjustable type?

If this part is not right solution, Would you please recommend right device?

Thank you. 

  • Hi Dino, 

    We have previously not seen our GaN devices used as e-fuses or hot swap devices. Could you provide more information on the system specs? What are the 80V/6A ratings referring to?

    In regards to the current fault trip point, the 36A value is the OCP threshold of the device. A device with a lower threshold would be the LMG3410R150

    Best Regards,

    John

  • Hi John, 

    EE is Industrial AC-DC for house or factory. please refer to the below concept.

    typ input 80V but 

    I know that LMG3411R070 has over current limit function. and there is no solution e-fuse  device with >80V input range. so I am trying to check GaN. 

    Please review again and let me know your opinion whether Our GaN devices available to use as e-fuses or hot swap devices or not. 

    Thank you. 

  • Hi Dino, 

    Theoretically, this part should be able to function as an eFuse for the system mentioned above. However, special care must be taken to keep the part within the recommended voltage and current ratings. 

    Although not likely in this application, the drain-source voltage ringing must not exceed the 480 V recommended operating condition.

    The continuous current through the device should be kept within 12 A at 125 C. 

    This part has a typical OCP trip point of 36 A. What is the intended current threshold of the fuse?    

  • Hi John,

    Is it possible to use below concept as an eFuse for customer system? or the customer have to use half bridge type like EVM?

    Please review below schematic and let me know your opinion. 

    e-fuse concept_211213.pptx

    Thank you. 

  • Hi Dino,

    Please give us some time to review this schematic, as we have not seen the device used an eFuse before. Thank you for your patience.

    Regards,

    John

  • Hi Dino, 

    Looks like the connections are correct except for the VNEG capacitor. Since the device uses the VNEG voltage to turn off, the VNEG capacitor has to be referenced to the source of the device.

    Best Regards,
    John  

  • Hi John, 

    Thank you for your comment. 

    I will modify EVM schematic to use as efuse application as your commendation.

    And If I need your help more, I will touch you again

    Thank you.