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LMG3410R050: Power Pins Rating and Current/Voltage Measurements

Sam Ref
Expert 1610 points
Part Number: LMG3410R050
Other Parts Discussed in Thread: LMG3410EVM-018, PMP20873

Dear Martin

I have 2 questions

  1. The power device LMG3410R050 has a rating of 12Amp, while the daughter board of the same power device (LMG3410EVM-018) has a rating 8Amp. We have been told that the limitation is in the power pins. If this is true can TI change these pins for us? Or can you send us pins with 12Amp rating and we change them ourselves? or can you at least recommend pins that we can use to operate at 12Amp.
  2. Do you have any product or reference design that allows us to measure the current and the voltage of the AC and/or the DC side of that daughter board? I do not believe the motherboard of that daughter board helps us getting these measurement. Does it?

Regards

Sam

  • 0
    TI__Expert 3225 points
    Hello Sam,

    Thanks for your questions. Here are my answers:

    1. Yes, the real limitation is the pins. They are rated for 8A. However, I do not think there will be any problems to stand 12A for short term. It is mainly for long term reliability considerations. Could you please share more information regarding the customers through internal email?

    2. Current we have our PFC design that can allow customer measure inductor side current. Measuring the device current would be hard. Could you please specify what exactly current that the customer is interested? Thanks!

    Lixing
  • 0 in reply to Lixing Fu
    Expert 1610 points

    Hi Lixing,

    Thanks for your reply regarding the pins.

    Regarding measurement.....we purchased LMG3411-duaghter boards..and we want to measure current and voltage.....dc and ac sides. Do you have product or reference design that just does that.

    Regards

    Sam

  • 0 in reply to Sam Ref
    TI__Expert 3225 points
    Hello Sam,

    For the LMG3411 board DC and AC side, do you mean the DC bus current and Switching node output current? If so, we currently do not have any EVMs that can sell to customers to allow current measurement (PMP20873). However, the PFC reference design does allow the measurement of AC side current. DC side current is typically not measured as it is only AC side current that is usually adopted as a control feedback signal.

    Please let me know if you have any other questions.

    Thanks and regards,
    Lixing