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TPS2330: TPS2330 as a power switch

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Replies: 16

Views: 381

Part Number: TPS2330

I’m attempting to use the TPS2330 as a power switch. I have a 12V battery-powered system. I want to control the overall power (about 3A) on/off by toggling the enable pin the TPS2330. Then, I want to do the same on another current leg (about 1A) of the system downstream from the overall power. I’m having trouble getting this to work. Has anyone done any similar application with this device?

  • In reply to Praveen GD:

    Praveen, thanks.  Here is the schematic.  Note that there is a mechanical switch between pins 1 & 2 of J500 (not shown) that switches on the Q502 transistor to enable the TPS2330.

    SystemPowerHotSwapCircuit.pdf

  • In reply to Carl Olen:

    Also, the U510 device simply controls an LED pilot light based on PWRGD from the TPS2330.  But of course, it never comes on.  Here is the waveform of the Enable Signal being switched to low ("ON") along with Vin, which never changes from 11.97V.

  • In reply to Carl Olen:

    And finally, here is the Enable Signal switching to low ("ON") along with Vout, which never changes from 0V.  I'm sorry I couldn't get all four waveforms on the same plot.  I don't have enough break-out cables for my scope probes.  Please let me know your thoughts.  Thanks, Carl

  • In reply to Carl Olen:

    Hi Carl,

    The schematics look fine as well. You can add a Schottky Diode across the output to freewheel the load, when the FET is turned OFF.
    It is surprising to see that neither Timer nor Gate ramping up. There is a typical 'Turnon delay time, ENABLE' of 85us. So, the gate should start ramping up at least after the last EN Low.
    Can you please check continuity of the circuit on your board?
    Also, please try replacing the IC just to be sure that the IC on board is not damaged.

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch

  • In reply to Praveen GD:

    Hi Carl,

    Can you update us on this issue ? Were you able to solve this issue ?

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch

  • In reply to Praveen GD:

    Hi Carl,

    I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out)

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch

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