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Performance of LMZ13610 in long run for medical devices

sagar saste1
Prodigy 120 points
Other Parts Discussed in Thread: LMZ13610, LMZ23610

I am planning to use LMZ13610 for my led Operation theatre light project. I would be driving it at 10A continuously. Since my product is a medical device,I would like to know the performance and reliability of LMZ13610 in long run.

Thanks in Advance

  • 0
    TI__Expert 3840 points
    Hi Sagar - We meet industry reliability standards as per our ICs. With that said also please note the last page of our datasheets which cover medical equipment:

    "No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use."

    Best Regards,
    -JP
  • 0 in reply to Juan Paulo Fung
    Prodigy 120 points
    Thanks for your reply.
    I would be using LMZ13610 to convert 12-24V to 3.3V. I will use it a source for LED's. The equipment will be used in operation theatre for lighting of operating area during operation. Unlike electro-surgical equipments, this equipment will not be used on patient.

    I require LMZ13610 to provide 3.3V , 10A for LED's. As mentioned in previous post, I would be sourcing 3.3V 10A continuous current from LMZ13610. Hence I wanted to know about its performance in long run.

    If it is not advisable for long run under these operating configuration, kindly suggest a suitable alternative.

    Thanks in advance.
  • 0 in reply to sagar saste1
    TI__Expert 3840 points

    Hi Sagar,

    Operating at max load of 10 A is not a problem for the long run.  One thing that you have to keep in mind is the Thermal design of your PCB.  You will be running LEDs, so the board will be getting very hot as well as the ambient temperature surrounding your LEDs will be getting hot.  On Figure 3 of the LMZ datasheet you'll find a "De-rating Curve" which shows the ambient temperature and the max Iout (load current) that you can effectively pull out.  Do you know what's your max ambient, size of PCB, number of layers, copper thickness and area, proximity of the LEDs, type of enclosure (metal, plastic), and airflow (fan)?

    For example, if you look at the De-rating curve, you can't go higher than 50 degC and pull more than 10A.  In order to avoid this, besides having a very good PCB thermal design and airflow, I might suggest using the LMZ23610 version that has current sharing capabilities.  This way the 2 power modules will split the 10A evenly and are able to run cooler at much higher ambient temperatures.  You can review the datasheet for detail information PCB layout and thermal recommendations as well as use our WEBENCH tool to simulate your design, obtain a full BOM and thermal sims.

    Let me know if you have further questions.

    Best Regards,

    -JP