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PTD08A020W: Two PTD08A020W parallel connection

Xiang Maverick
Intellectual 750 points
Part Number: PTD08A020W
Other Parts Discussed in Thread: UCD9248,

I use UCD9248 as power controller and PTD08A020W as power stage. One PTD08A020W module is not enough to supply current considering my application.  I use 2 PTD08A020W modules in parallel connection source up to 40A current. I am not sure how to connect the modules in parallel. Can I just connect the VOUT of the two stage? The datasheet shows connecting VOUT is OK. But I am worried if two stages output voltage with a slight difference, the power stage outputing a higher voltage will source the power stage outputing a lower stage.

  • 0
    TI__Expert 8130 points

    Hi Maverick,

    As you mentioned, connecting the VOUT of the two stages like in Figure 19 of datasheet should be okay.

    Your concern over the two power stages connected like this is reasonable, due to all identical DC/DC converters will not have symmetrical output. But, that is where this particular controller comes in. The controller integrates multi-loop management with sequencing, margin, tracking and intelligent phase management to optimize for total system efficiency. In other words, the controller provides the right protection over your concern.

    Regards,
    Alejandro