I need to choose a High voltage, High current operational amplifier to drive a servo valve with voltage range of +15,-15 and current 1 ampere, for amplification of current in a driver circuit.
1- I have already chosen opa544t, but in it's datasheet specified "2A min" for output current, it's mean that this op-amp couldn't drive my 1A valve?
2- Does anybody have better suggestion, I wonder if you help me?

 

Hello,

You could have a look at the LM675 or LM 1875.
See this post for the datashets:
http://forum.allaboutcircuits.com/threads/components-selection-guide.65137/#post-448192

We use the LM1875 as a current source in the NMR systems.

Bertus

 

No, it means that it is guaranteed to drive up to a 2A load while meeting the Vol and Voh specs.

Obviously, if you run it with no load, the opamp will happily drive the output pin to a voltage determined by the feed back. As the load resistance is decreased, ultimately the opamp will reach a point where it can no longer supply enough current, which is spec'ed to be 2A