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TPS22810: Connecting multiple load switches in parallel (TPS22810)

Daniel Nagy96
Prodigy 40 points
Part Number: TPS22810
Other Parts Discussed in Thread: TPS27S100, TPS1H100-Q1

Dear Forum Members,

I am planning to use the TPS22810 load switch to switch a 12 V rail that supplies approx. 3 A. I would like to connect multiple TPS22810 switches in parallel to share current and lower the power dissipation in the switches.

Can these load switches connected in parallel? If so, are there any precautions to take or is it as simple as just paralleling them? The document "Parallel Load Switches for Higher Output Current & Reduced ON-Resistance Design Guide" suggests that it is, but I'd like to make sure that what the document shows is also applicable to the TPS22810.

Thanks and regards

Daniel Nagy

  • 0
    TI__Mastermind 32650 points

    Hi Daniel,

    These load switches can be placed in parallel. The major concern when doing this is that the split of current may not be equal due to the slight variation in R_on between the devices used.

    For this voltage level and current requirement, is it acceptable for you to use a high-side switch? This is another option but I would recommend you taking a look at TPS1H100-Q1 or it's industrial sister device TPS27S100.

  • 0 in reply to Shreyas Dmello
    Prodigy 40 points

    Thank you. Based on Figure 3 in the datasheet of TPS22810, the positive tempco of R_on should have a stabilizing effect on current sharing. As the high side switch you suggested looks more complicated than what is needed for my simple application, I'll stick with multiple TPS22810's in parallel.