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TPS2413: OR-ing power with priority hysteresis

Rhys Dippie
Prodigy 10 points
Part Number: TPS2413

I have dual battery packs of between 10.5 14.5 voltage.

I want to power up with pack A if it is available, then when the voltage drops below 10V, (Battery exhausted or removed) seamlessly switch to pack B. Pack B should remain as priority even if pack A is replaced.  When Pack B drops below 10V, it should seamlessly switch back to A.

As a bonus it would be great if I could disable both packs in the same device for shutdown.

Is this possible with any of the TI power ORing products?

  • 0
    TI__Expert 3370 points

    Hi,

    ORing by definition refers to getting the higher voltage at the output when given two or more input voltages (eg. for two input voltages A and B, ORing A and B gives the higher of the two voltages at the output). So when the operating voltage of either battery pack drops below the other, the voltage of the other battery pack appears at the output. If both A nd B are 10V, then if A becomes say 9.5V, the ouput switches to B by definition and vice versa. This behavior is common to all reverse current protection ideal diode/ORing controllers in the portfolio, by the virtue of being able to disconnect the supply rail with higher output voltage than the input(reverse current protection).

    Thanks and best regards

    Divyanshu

  • 0
    Prodigy 10 points

    Would you say that a mux controller would be more suitable?

  • 0 in reply to Rhys Dippie
    TI__Expert 3370 points

    Yes, power mux controller could be used in case there is a there is a priority between two power sources, in order to have full control over which path to enable. If there is no preference for which input supply to use, or if the preference is to always use the highest input voltage supply available, then ideal diode controllers would be a suitable choice.

    Best regards

    Divyanshu