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Need recommendation for TI part

ikon
Genius 5355 points
Other Parts Discussed in Thread: LM76002-Q1, LM76003-Q1, TPS40200, UC1825-SP, LM76002, LM5118, UC1843-SP, UC1845A-SP, LM5022

Hi Support,

Does TI has a quadruple differential line driver with 3V3 Vcc, meet TIA/EIA-422-B and Hi-Rel part?

In addition, hi-rel switching part with below specification.


Vin = 24 ~ 60V

Vout = 6V @ 3A
Vout = 5V @ 2A
Vout = 16V / 20V/ 24V/ 28V @2A


Vin = regulated 6V (from the 6V output above)

Vout = -5V @ 300mA

  • 0
    TI__Guru 62930 points
    Shaun,
    You can see available high rel differential drivers here:
    www.ti.com/.../products.html
    I will have to have the power apps take a look at the other inputs.
    Are you looking for ceramic or EP.

    Regards,
    Wade
  • 0 in reply to Wade Vonbergen
    TI__Expert 7445 points
    Hi Shaun,

    For the power needs:
    1. What is the output regulation, output ripple required and temperature range in your application.
    Do you require tight regulation for each output thus individual rail will provide each output. or one can design a multi-output i.e. a forward converter ( this is x-fmr based design) with one main output that is tightly regulated and other outputs will be loosely regulated.
    If you can elaborate more on your power need specifications.

    Thanks
  • 0 in reply to Ramesh Khanna
    Genius 5355 points

    Hi Ramesh,

    Vin = 24 ~ 60V

    Vout = 6V @ 3A

    Vout = 5V @ 2A

    Vout = 16V / 20V/ 24V/ 28V @2A

     

    Vin = regulated 6V (from the 6V output above)

    Vout = -5V @ 300mA

     

     

    #1. Ripple:~20mV, -40 to 100 degC

    #2. Both OK. Prefer less space, high efficient. Components count and Hi-rel.

    Thanks.

  • 0 in reply to ikon
    TI__Expert 7445 points
    Hi Ikon,

    For Vin 24V - 60V Vout = 5V, 6V, 16V, 20V, 24V, 28V up to 3A.
    high efficiency, low component count, small size, temp range -40C to 125C you can consider the following parts
    LM76002-Q1 up to 2.5A note this is a synchronous buck automotive part or LM76003-Q1 for up to 3.5A.
    www.ti.com/.../lm76003-q1.pdf
    For Vin = 6V and Vout = -5V @300mA you can use TPS40200 - controller and configure in buck-boost configuration.



    However can you elaborate more with regards to your comment on Hi-Rel. do you need radiation hard device for space application?
    In you need rad hard solutions then consider using x-fmr based using UC1825-SP controller in forward configuration. solution will be larger as it will require a x-mfr.
  • 0 in reply to Ramesh Khanna
    Genius 5355 points

    Hi Ramesh,

    LM76002 is a step-down regulator. Need a buck boost.

    Vin = 24 ~ 60V,                       Vout = 16V / 20V/ 24V/ 28V @2A

    Thanks.

  • 0 in reply to ikon
    TI__Expert 7445 points
    Hi Ikon,

    You are correct, however standard Buck-boost converter will provide negative output voltage. But using the flyback or SEPIC (single ended primary inductor) topology one can get positive output voltage. Or one can get positive output using four switch buck-boost as in LM5118.
    For Vin = 24 - 60V
    For Vout = 16V and 20V you can use the buck converter using LM76002 as indicated previously.
    For Vout = 24V, 28V @2A you can consider UC1843-SP or UC1845A-SP and configure it as flyback converter. Add a 2nd stage filter to meet output ripple spec. Note this will be x-f-fmr based. thus the solution size will be bigger.
    Note Flyback is isolated buck-boost converter but can give you positive output voltage.
    You can also use TPS40200 and configure it as buck-boost however max input is rated to be 52V instead of 60V.

    Other options are smaller size if used as SEPIC, BUCK-BOOST topology. Flyback will require 2nd stage filter to meet ripple spec.
    LM5118 controller buck boost positive output.
    LM5022 controller use as flyback or SEPIC converter.