• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 48 subscribers
  • Views 485 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

High Output Current Op-amp(LM8262) Question

Sahil Bhakta
Prodigy 30 points
Other Parts Discussed in Thread: LM8262

Hello,

I was wondering if this particular Op-Amp(LM8262) outputted a constant current of 60mA. I'm using this as a voltage follower. I have noticed that some Op-amps will output different current values when setup in this manner while having the same output voltage. So if I were to put this Op-amp in my circuit would I have and output current of 60mA with the same Voltage I'm having with all other op-amps?

I'm outputting a voltage of 2.5V with a current of 30mA, if I use this op-amp would I have a voltage of 2.5 V with a current of 60mA?

Thanks,

-Sahil

  • 0
    TI__Mastermind 49896 points

    Hello Sahil,

    Each op-amp family will have different current-limit values. The output will limit the current by folding-back the output voltage, which limits the output swing.

    Most general-purpose op-amps are in the 20-30mA range. There are a few "high output drive" op-amps that can go up to 50-100mA and some on up to several amps.

    You can get a general idea of the current limit from the "Short Circuit Current" spec in the table - though you generally do not want to operate too close to that as you are not in a "linear" region at that point (out of regulation).

    What is your supply voltage? This makes a big difference in output drive.

    Regards,

  • 0 in reply to Paul Grohe
    Prodigy 30 points

    Our Supply Voltage for the entire circuit is 5V, but we have 2.5 V entering the Op-Amp.

  • 0 in reply to Paul Grohe
    Prodigy 30 points

    I was wondering if you needed additional information.

    -Thanks