Announcement

Collapse
No announcement yet.

Voltage Regulator

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Voltage Regulator

    I have a voltage regulator on a circuit, part number L7805CV, and I get around 32 volts on the input and 14.88 volts on the output. What I want to know is that enough volts for the circuit to operate on when it says it needs 15V? I know there is some logic that is supplied by this voltage.

    The reason this is concerning me is because there is a bypass cap on the line (the one that goes from the circuit to ground) that was bad. I dont think the low voltage caused it; however, what would be effected by the cap blowing. The device I am working on is a CLSC-12S subwoofer it turns on but has no sound coming out. I checked the transistors on the circuit they seem to be fine.

    #2
    Re: Voltage Regulator

    I asume you mean an L7815CV.

    14.88v is well within the tolerance of the regulator (14.25V to 15.75V under load conditions).
    ________________________________________________

    Invisible airwaves crackle with life
    Bright antennae bristle with the energy
    ________________________________________________

    Comment


      #3
      Re: Voltage Regulator

      Don't 78xx type voltage regulators need only 2-3V more coming in than going out?

      OTOH some of them have a power-saving feature that for some reason makes them put out almost the full input voltage unless the output load is at least 25mA (2.5mA? I'm not sure). I think ST brand was or is like that.

      Comment

      Working...