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    Closed loop current sensor

    Minder, thanks for the suggestion! That would work nicely, however, the measurement requires a wide aperture to accommodate more that a single conductor. I do love that Allegro company, and they have a lot of nice products. I've been playing with their 136x hall effect sensor(s) and the range of...
  2. L

    Closed loop current sensor

    Hello! I have managed to build the sensor and I have some interesting notes: For one, low primary:secondary turns ratio is not usable. In my previous posts I mentioned I would try n = 12. That's a non-starter. What happens is that there is a finite amount of offset error in the hall device...
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    Closed loop current sensor

    I got the IC. I was so excited to use it. Created my schematic wrong and spent a whole lot of time wondering why it wasn't working. FYI, always work from the datasheet for pinouts, vs. your prototype schematic. I had transposed pins 1-10 with 11-20, so that I was dumping full supply current into...
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    Closed loop current sensor

    Harald, really, thank you! Once gain it appears there is a brilliant TI part that can do what I want, and I'll read that datasheet forwards and backwards. What you explained is completely true about the offset. at G = 100, there was about 480 mV of offset that I needed to null out with a...
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    Closed loop current sensor

    Hello, I am building a closed loop current sensor and having a very hard time finding good documentation about how to make one. I'm hoping I can solicit some help from the many savvy members of this forum. I will post a schematic as soon as I can, but here's something to get this started...
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