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DS90UB913A-CXEVM POC max Supply crrent

Kikuo Mita
Intellectual 2515 points
Other Parts Discussed in Thread: DS90UB913A-CXEVM

Please advise me using DS90UB193A-CXEVM

Q1. DS90UB913A-CXEVM is used in POC mode, supplying 5V CD from DS90UB914A
    how much current does DS90UB913AEVK consume at most?

Q2 How much current can POC supply?
       What items limit the current?
         a.  Saturation current of the Filter coil (L2, L10 on DS90UB913EVK, L2, L9 on SD90UB914A)
                          or increasing temperature?
         b.  Max current of the SMB connector?
         c.  Resistance of RG174 cable?
         d.  Other factors?

Mita

  • 0
    TI__Genius 13475 points

    Mita  

    The major thing to be concerned about in the POC design is the choice of the inductors - the inductors will be passing a DC current for the power, and at the same time, need to provide a high impedance to the communications channels at higher frequencies - if the current exceeds the saturation current for that particular inductor then the inductor will no longer present a high impedance to the communication channel.   The saturation current is specified in the inductor datasheets.   The inductors chosed on our eval board were chosen such that with a 5V POC solution, we would be able to power the serializer and a typical megapixel imager such as the OV10635.

    Mark