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LM5170EVM-BIDIR: Output Voltage Control

Jejomar Ildefonso
Expert 8700 points
Part Number: LM5170EVM-BIDIR
Other Parts Discussed in Thread: LM5170

Hi Team,

Our customer intends to use parallel LM5170EVM-BIDIR referencing the daisy-chain configuration provided on section 8.4.1.2 of the LM5170 datasheet. Can we control the output voltage of single converter using the host MCU? So that a control loop for single converter is done using the host where we can use the same loop for all the converter modules connected in parallel?

Thanks in advance!


Kind Regards,

Jejomar

  • 0
    TI__Guru 71485 points

    Hi Jejomar,

    Thank you for posting.  Yes this can be done.  To parallel more LM5170 circuits, you just need to the additional LM5170's ISETA pin to be connected to the host's, then they will operate to evenly share the total load current.  Also make sure you tie their DIR pins together, too, to run them in the same direction.

    Thanks,

    Youhao

  • 0
    Prodigy 60 points

  • 0 in reply to Youhao Xi
    Prodigy 60 points

    Are there connection diagrams for interfacing board with MCU. And connecting two boards in parallel. can we realise it by any schematic. So that i can understand easily by looking some pictures how to connect.

    You can see two batteries lead and lithium at each LM5170EVM_BIDIR board output.

    1. I need 12V from 1st module to charge Lithium polymer

    2. I need 9V from 2nd module to charge lead acid. How can I implement this?

    What kind of strategy should be used to attain different outputs at each converter board output terminal?

    Do I need to maintain same otuput voltage at each converter board to implement Master slave

  • 0 in reply to Youhao Xi
    Prodigy 60 points

    I read the user guide but not much information how to operate the board with MCU. I see it like Contact TI for info on operating the EVM with the MSP431 Launchpad or C2000 MCU. 

    If you had any application pdf about this. Please forward it

  • 0 in reply to Banala Kranthikumarreddy
    TI__Guru 71485 points

    Hi Banala,

    Please refer to the following TI design which employs the C2000 as the MCU.

    https://www.ti.com/tool/TIDA-01168

    Thanks,

    Youhao