Op-Amp

[Samwel]

Hi, I am trying to understand how to use an op amp. My question is, can I use an op-amp as a voltage booster ?
Thanks alot

[Aodhan145]

No not really an opamp can only give out voltages within its supply rails, but you can set up a oscillator to drive a switching regulator to boost voltage, but you need to know how op-amps work.

Watch this video. If you still do not understand it watch it again and again and again.
I have personally found it very useful.

[Samwel]

Thanks a lot. I will definitely find this video useful.

[rstofer]

Hi, I am trying to understand how to use an op amp. My question is, can I use an op-amp as a voltage booster ?
Thanks alot

Under conditions as shown in the video, the output voltage from an op amp can be larger than the input.  Whether that is a 'voltage booster' or not, I don't know.
What exactly are you trying to accomplish?

[danadak]

As the previous poster noted an OpAmp at its most basic function is
an amplifier. So Vout = G x Vin or -G x Vin.

So in a sense it could be considered as a "booster".

Generally though a booster would be though of as a power booster,
and for that a switch mode power regulator chip/circuit is the solution.
An OpAmp can be used as a power booster, there are actual power
OpAmps for that purpose.


Regards, Dana.

[Ammar]

Not really. You cannot go above your supply rails for your output voltage. Try a boost converter instead.

[danadak]

Original poster has no constraint that he is trying to go outside
supply rails.


Regards, Dana.

[Aodhan145]

Yeah I realised that after I posted that it can be interpreted both ways.

[ebclr]

But you can go outside the rails with OP, just make a  square wavee oscillator ( comparator with RC feed back ), and with some diodes and caps you go easily out of the rails positive and negative

[eetech00]

Hi, I am trying to understand how to use an op amp. My question is, can I use an op-amp as a voltage booster ?
Thanks alot

There are different opamp configurations. A "non-inverting opamp configuration" can be use to amplify an input voltage, but not beyond its own power supply input rails.

[Synthetase]

Hi, I am trying to understand how to use an op amp. My question is, can I use an op-amp as a voltage booster ?
Thanks alot

Have a read of this as well, then get your bread board out and start playing with them.

[danadak]

Some ref material -


http://www.ti.com/lit/an/sboa092a/sboa092a.pdf


http://www.atom.fysik.lth.se/Qi/laser_documentation/Selected_articles/Burr%20and%20Brown,%20Handbook%20of%20operational%20amplifier%20applications.pdf


http://www.analog.com/library/analogDialogue/archives/39-05/op_amp_applications_handbook.html


Regards, Dana.