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Current Limiting a Buck-Boost Converter (e.g. TPS63030)

Charles Gervasi
Expert 2270 points
Other Parts Discussed in Thread: TPS43000, TPS63030, TPS22946

I'm consdiering a TPS63030, and I'm considering trying to limit its current to 20mA.  Is there any app note for limiting the output current? 

Thanks,

CJ

  • 0
    TI__Guru**** 191445 points

    Most of the converters with integrated FETs have internally pre-set current limits that are not adjustable.  You could probably devise a way to limit current externally, but I'm sure the amount of circuitry required would not be practical if you are looking at the TPS63030.  If you absolutely need adjustable current limit a controller with external FETs such as TPS43000  is probably the best solution.

  • 0
    TI__Guru**** 150590 points

    You might also look at adding a USB switch or load switch to the output.  These typically limit the current and some are adjustable.  An example is the TPS22946. 

    I will move this post to the power interface forum where they can help you select a suitable device.  Could you provide them with more information about your setup, the voltages, and why the current needs to be limited?