Issue with Controlling a DC/DC Boost Converter

Discussion in 'The Projects Forum' started by Marquis, Jan 18, 2015.

  1. Marquis

    Thread Starter New Member

    Jan 18, 2015
    16
    0
    I have a simple circuit that uses a DC/DC boost IC to raise the voltage from a single AA battery to run a processor and small transmitter. The problem is that, at times, I want to turn off the DC/DC boost (while the transmitter is disabled) so that I can sample the battery voltage.

    The Boost IC (the NCP1402) has a pin that enables or disables itself. I would like the processor to be able to take that pin low in order to disable the NCP1402. I don’t think I can use the processor directly to do this, I’m guessing I need a transistor in there. Can anyone suggest how I would do this?

    CircuitPic.jpg
     
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,290
    1,255
    You can remove the enable from the output an drive it directly with your micro.
     
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