Battery Charging

Discussion in 'General Electronics Chat' started by brian25, Aug 4, 2013.

  1. brian25

    Thread Starter Member

    May 13, 2013
    37
    0
    hi sir/ma'am is it safe to used this battery in my psu circuit? do i need to use a control charger for this?

    tnx


    [​IMG]


    YB2.5L-C-1(12V2.5Ah) Sealed Lead Acid Motorcycle Battery
    maintenance free


    [​IMG]
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
  3. LDC3

    Active Member

    Apr 27, 2013
    920
    160
    Max, that is not what the OP asked for. I believe he is asking if he can use the battery (as a backup) in his PSU.

    The problem with a 12V source and a 7812 voltage regulator means that the output is less than 12V due to the drop from the regulator. One option is to bypass the regulator when the power is off. But you need to be careful that you don't supply 13V to components that cannot take the higher voltage.

    It will be fine for the 7805 voltage regulator.
     
  4. ian field

    Distinguished Member

    Oct 27, 2012
    4,413
    782
    With LDO regulators, the battery might keep it up for a few minutes - but not with the diode drop in series with the regulator input.
     
Loading...