BP9831A data sheet

Discussion in 'General Electronics Chat' started by hp1729, Aug 18, 2016.

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  1. hp1729

    Thread Starter Well-Known Member

    Nov 23, 2015
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    Can anybody find one in English? From what I can find it looks like VCC should be around 16 V. Can I get a confirmation from somebody?
     
  2. debe

    Well-Known Member

    Sep 21, 2010
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    If you look at the circuit I posted betwean pins 3&4 theres a capacitor 1.5uf & a resistor fed through droping resistors from the main supply.
     
  3. hp1729

    Thread Starter Well-Known Member

    Nov 23, 2015
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    It looks to me that the board is more designed for110 V. 240 V would put more stress on the internal Zener. Maybe 51K would be better than 150K for 240 v operation? But then it wouldn't work so well at 85 V :)
    One board for 85 V to 240 V? Seems to have a shorter life at 240 V. :)
    Wow, all the LEDs are in series? Current limiting is set to about 120 mA, 240 mA maximum.
    Not a bad little chip. A bigger case with a bit of heat sink might be a good idea.
     
  4. debe

    Well-Known Member

    Sep 21, 2010
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    When it was working I managed to measure the voltage across the LEDs at 85V dc, & the current at 100ma. Just checked the Vcc voltage its 12V dc.
     
    Last edited: Aug 18, 2016
  5. hp1729

    Thread Starter Well-Known Member

    Nov 23, 2015
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    Thanks for the checks. Good work on the schematic.
     
  6. DickCappels

    Moderator

    Aug 21, 2008
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    After some discussion, this thread is in conflict with the User Agreement to which we are all a party. It is not closed.

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