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LT1787 current monitor when low voltage?

Discussion in 'General Electronics Discussion' started by eem2am, Jul 17, 2013.

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  1. eem2am

    eem2am

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    Aug 3, 2009
  2. daGenie

    daGenie

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    Jan 23, 2012
    The buffer there helps to isolate the output of the lt1787 and the input of the ltc1404. Due to the high impedance of a buffer, the amount of current needed to drive the input is relatively small and therefore can monitor very small changes in its input. If you consider it using Ohm's law, a very high value of R with a very small changes in the value of I would produce a very large change in the value of V. (V = IR).

    Without the buffer, the output of the lt1787 would depend on the input impedance of the next stage that it tries to drive.
     
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