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Original question:

TPS2062: TPS2062DR related questions

TPS2062: TPS2062 related questions

Ray Pourjalilvand
Prodigy 110 points
Part Number: TPS2062

Hello,

I have a couple of quick questions in regard to TPS2062 device. I'm using only one channel of this device to power a USB 3.0 connector. This device will be located on the I/O board close to the USB 3.0 connector in a SFF chassis. My questions are:

1) The +5V is generated from the main chassis power supply and will be brought into the I/O board area where the device resides. This is a regulated +5V power and so I will apply this to the input voltage pin (pin 2) of the device. I'm a bit concerned that this +5V power will be traveling quite far before it gets to this device. I'm adding the recommended 10uF and .1uF caps on the input side of Vin.  Is the device immune to any noise on the input supply?

2) If this is basically a switch and (voltage out = voltage in , current out = current in), is there going to be any kind of voltage or current drop across the switch?

3) The Enable pin (EN1#) will be driven by a processor based on the feedback it gets from OC1# signal. I don't suppose I will need a pull-up on this line if it is being driven by the processor?

Thank you for your help.

Ray 

  • 0
    TI__Expert 8980 points
    Hi, Ray,

    Below are my comments for your questions:
    1) TPS2062 is not noise sensitive, so I think the long Vin trace is okay as long as the 10uf and 0.1uf is put close to part.

    2)You can take it as a power FET from IN to OUT. The only voltage drop is Rds_on of the power FET(Typical 70mohm, you can refer to datasheet).
    No current drop.

    3)If your processor can output voltage, you don't need to pull up EN. If the IO of your processor is an open-drain output, you need to pull up EN pin.

    Feel free to ask any questions.

    Regards,
    Bob

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  • 0 in reply to Bob Ma
    Prodigy 110 points

    Hi Bob,

    Fantastic. You have answered all my questions and concerns. Thank you so much for your time. 

    Regards,
    Ray