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24V input, 12V output, current=50A or higher

dengshan yang
Prodigy 155 points
Other Parts Discussed in Thread: LM5119

hi ,

  I need a power management for our new design, the requirement is below,

1.input 24V

2. ouput 12V

3. output current = 50A or higher

could you recommend?

  • 0
    TI__Expert 7900 points

    Hello Dengshan,

    Could you please provide a bit more details on the application:  where is this used (automotive, industrial, computing, etc), acceptable switching frequency, Vin range, do you need input/output isolation, sensitive to efficiency, etc.  When I have more details I can make a better recommendation.

    Also, have you tried TI's Webench designer?  It can provide a lot of assistance when starting a new design:  recommend IC and even provide schematic.  Link to Webench is below.

    https://webench.ti.com/power-designer/switching-regulator

    Regards,

    Eric

  • 0 in reply to Eric Reicher
    Prodigy 155 points

    hi Eric,

    it's used to medical product, we'll design a TEC module with your controller DRV8432, 12V output power for VDD,GVDD,PVDD of DRV8432, but the TEC has high current up to 13.9Amps, and we'll use 4 xTEC, so we need a solution for 24V input/12V ouput with 50Amps or higher,  by the way, the TEC model is XLT2418, see picture below.

    BR

    Jerry

  • 0 in reply to dengshan yang
    TI__Expert 7900 points

    I see.

    First, do you need isolation from 24V to 12V?  This will drive topology.

    Second, what are the tolerances on both 24V input and 12V output?

    Third, do you have a target switching frequency?

    Thanks,

    Eric

  • 0 in reply to Eric Reicher
    Prodigy 155 points
    Eric Reicher said:

    I see.

    First, do you need isolation from 24V to 12V?  This will drive topology.

    Second, what are the tolerances on both 24V input and 12V output?

    Third, do you have a target switching frequency?

    Thanks,

    Eric

    hi Eric，

    First, do you need isolation from 24V to 12V? This will drive topology.

    -------isolation is not necessary to me，I don't care about this.

    Second, what are the tolerances on both 24V input and 12V output?

    ------ 24V±5%，12V±5%

    Third, do you have a target switching frequency?

    ------ no, I haven't, I just care about the 12V output and current.

    BR
    Jerry

  • 0 in reply to dengshan yang
    TI__Expert 7900 points

    Hello and thank you for the information.

    I believe a 2-phase buck regulator will suit your needs very well.  As a matter of fact, we have a reference design that is very close to what you need.  This design has been fully assembled, tested, and documented.  It is based on the LM5119.

    https://www.ti.com/tool/PMP10260

    This design is 24Vin, 14.4Vout, at 60A.  You can easily change Vout from 14.4V to 12V by changing the resistor divider network (R39, R40, R42).