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  1. #1
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    Any good optocoupler IC for voltage sensing with single voltage source

    Can anyone suggest a good optocoupler IC, that I can use for voltage sensing with single voltage source. I am using ACPL currently, but it requires two voltage sources. When I use this IC for both primary and secondary side of my transformer isolated power converters, I need 3 separate voltages sources. Output side of the ACPL, I can use the same voltage source, but input side I need separate voltage sources.Otherwise, it will short both input and output side.

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  2. #2
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    Re: Any good optocoupler IC for voltage sensing with single voltage source

    Hi,

    "ACPL" is no exact device type. At farnell a search on "ACPL" gives more than 200 results.

    I am using ACPL currently, but it requires two voltage sources
    What do you mean?
    Usually the input of an optocoupler simply is a LED. Although a LED has 2 pins, itjust needs one voltage source.

    When I use this IC for both primary and secondary side of my transformer isolated power converters, I need 3 separate voltages sources
    What does this mean? --> show your circuit.

    All in all a very confusing, unelaborated post. (At least to me)

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  3. #3
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    Re: Any good optocoupler IC for voltage sensing with single voltage source

    There are a lot of optocouplers in use out there: pc817, 4n25, etc. They all work fine.

    For the fact that you asked this question, it seems there is more to your question than I have attempted to answer.
    -------------
    --Akanimo.



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  4. #4
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    Re: Any good optocoupler IC for voltage sensing with single voltage source

    The question makes sense if it refers to ACPL series of isolation amplifiers and sigma-delta modulators. However there's none with built-in power transmission to the primary side. Analog AD202 is an isolation amplifier with built-in DC/DC.



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