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LMZ23610: LMZ23610 related issues

jeno.zhang
Expert 2385 points
Part Number: LMZ23610

Hi，

The customer's power supply product uses LMZ23610 chip, with an output of 5V/50A. Five chips are used to work in parallel, but a failure phenomenon has occurred and the cause cannot be found. Comparing the chip datasheet, it was found that in the recommended circuit manual, when multiple FB pins are connected in parallel, only one connection is needed, while the FB pins of other modules are suspended. However, when designing, we found that the dynamic response of FB suspension is poor, so we shortened the FB pins of multiple modules together, which is different from the usage of datasheet. May I ask if there are any issues with using this method and if it may be the cause of the failure？

  • 0
    TI__Expert 3766 points

    Hi Jeno,

    What do you mean by dynamic response of FB suspension is poor? And what behaviors allowed for a "better result" when shorting all the FB together?

    It is not recommended to deviate from the datasheet configuration with the FB pins for all devices shorted together. This causes issues with master and slave relations and functions that rely on FB, like OVP, will not behave as described in the datasheet. 

    Regards,

    Henry