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TPS2663: TPS2663 : Connecting 2 TPS2663 in parallel

Eric Danoy
Prodigy 20 points
Part Number: TPS2663
Other Parts Discussed in Thread: LM74700-Q1, LM5060-Q1, LM5060

Hi

I'm working on a new design and I intend to use a TPS2663 to protect the primary DC/Dc of my design.

I need protection for reverese polarity, and overvoltage..

I also need protection for load dump but I will USe TVS diode before the TPS2663I also need to limit the inrush current.

The system is an emebdedded system for automotive and railwau application.

The system shall work in the range of 12 to 36  V DC (24 V DC nominal voltage trough a battery) and the maximal input current (nominal case) will be 10 A.

The TPS2663 seems to be a good cadidate excpet for the max current.

It seems I can use 2 TPS266 in parallel but is there any specific way to connect the 2 TPS2663.

Another solution could be the use off a LM74700-Q1 with a high side switch .

Thanks for your answer

rRgards

Eric

 

 

  • 0
    TI__Guru** 105361 points

    Hi Eric,

    Thanks for reaching out!

    Doesn't you need automotive grade part ? LM74700-Q1 cannot be used as a high-side switch. 

    Please look at LM5060-Q1 for automotive applications and let me know your thoughts.  What is the max load current ?

    Best Regards, Rakesh

  • 0 in reply to Rakesh
    Prodigy 20 points

    Hi Rakesh

     Thanks for your quick answer

    I don't really need automotive grade components

    I know that LM747000  is not a high side switch, I just want to use it to protect the system from reverse battery connection.

    The Idea is to use a LM747000 to protect frombattery reverse connection followed by 2 x TPS2663 in parallel.

    The transcient protection will be done using TVS diode in front of the LM747000.

    Do you think this could be a good solution?

    If so can you please explain me how to configure the TPS2663 to make them work in parallel (just connecting the 2 out together? Or is there any specific way to do that?).

    The maximum nominal load current will be 10 A and I can limit the inrush current to a very close value of that max nominal current because the max load current when power supply is on will be less than 2A.

     

    I have a look at the LM5060 data sheet perhaps it can satisfy my requirements.

     In fact I need to protect the font DC/DC converter of my system from reverse battery connection and for overvoltage.

    I also need to limit the inrush current to approximatively 15 A during 1 second.

    As I understand the LM5060 doesn't limit the current it shuts down if there is an overcurrent so it's not really a current limitation for inrush current.

    I also don't understand how the current limit value is set on this device.

      

    Best regards

    ERic

  • 0 in reply to Eric Danoy
    TI__Guru** 105361 points

    Hi Eric,

    TPS2663 can be used in parallel configuration following the concept discussed in app note http://www.ti.com/lit/an/slva836/slva836.pdf however we need to yet evaluate it. 

    I have attached the circuit configuration. You would need single BFET (external FET) capable of handling full load current and then parallel TPS2663. Connect IN, OUT, IN_SYS, UVLO, OVP, dVdT, ILIM, IMON pins together for time synchronization and uniform reference settings.

    TPS2663_parallel_config.docx

    Best Regards, Rakesh