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PTB78560x question

Ken Hasselmann
Prodigy 10 points
Other Parts Discussed in Thread: PTB78560A, PTN78020W, LM5020

Hi,

I'm currently designing a PCB for a robotics application, but when i did send the prototype to printing,
i forgot that i had a 10.8V battery.

I saw after that the PTB78560x (http://www.ti.com/lit/ds/symlink/ptb78560a.pdf), does only allow Vmin to be 18V.

M question is : Can I use the PTB78560AAH to get 5VDC from a 10.8VDC battery ?

Thanks,
Regards.

  • 0
    Guru 22270 points

    Hello Ken,

    I took a quick look at the data sheet and the minimum input voltage for the A, B  and C versions is 18V.  Perhaps I missed it, but where in the documentation did you see that a lower voltage could be used?  Or was it a typo and you meant "does not allow".

    It I am correct, then you would not be able to use a single 10.8V battery, you would have to use 2 in series to get your 5V output from the PTB78560A.

    Thanks,

  • 0 in reply to Greenja
    TI__Mastermind 38230 points

    HI Ken:

    The PTB78560 isolated converter minimum input voltage is 18V with input voltage range 18V to 60V.

    Ifx this application does not require isolation, then PTN78020W  at 5Vout  and 10.5Vin can be used.

    If isolation is required, then the discrete solution can use the LM5020.

    Tom