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LMV7231

Richard Henne
Prodigy 10 points

Other Parts Discussed in Thread: LMV7231

Can one use 5 channels of the LMV7231 comparator to monitor a single battery and provide alarm signals at specified voltages?

  

  • 0
    TI__Guru 68826 points
    Hello Richard,

    Yes. It should be possible. You would need to read the individual COx outputs since the combined (OR'ed) AO "error" output can not distinguish between the individual channels. The AO output is expecting only one error (true) condition at a time.

    Each "level" (channel) would need it's own resistor divider. Remember that the + and - inputs are compared against the internal 400mV reference (forming a window comparator around 400mV).

    The voltage divider would need to center the trip points around 400mV. This may precludes using a single tapped resistor string...depending on your voltage windows. Also be mindful of the paralleled resistor dividers and their continuous current draw from the battery.

    The alternative is to use discrete comparators and a tapped divider string.

    Regards,