Hi Guys, I have built a voltage to current amplifier and need some help - I am having "power supply issues."
The op-amp I am using is the high voltage, high current OPA549T: http://www.ti.com/lit/ds/symlink/opa549.pdf
When I tested my amplifier with the Radio Shack 13.8 VDC/3 AMP power supply it worked just fine: http://www.radioshack.com/product/index.jsp?productId=2103959
However, when I tested it with the meanwell SP-150-12 power supply my amplifier did not work (i.e. I did not measure any current across the load): http://www.meanwell.com/search/SP-150/SP-150-spec.pdf. I want to use this power supply to take advantage of the high output current of the op-amp (10A max).
I based my circuit design on this website (see figure 3): http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/opampvar2.html. Just as the figure shows, R1 is my load and I have made R2 just the wire (so that output current is as high as possible).
My qusetion is: what could cause my amplifier to not work when using the meanwell power supply? I really need help.
The op-amp I am using is the high voltage, high current OPA549T: http://www.ti.com/lit/ds/symlink/opa549.pdf
When I tested my amplifier with the Radio Shack 13.8 VDC/3 AMP power supply it worked just fine: http://www.radioshack.com/product/index.jsp?productId=2103959
However, when I tested it with the meanwell SP-150-12 power supply my amplifier did not work (i.e. I did not measure any current across the load): http://www.meanwell.com/search/SP-150/SP-150-spec.pdf. I want to use this power supply to take advantage of the high output current of the op-amp (10A max).
I based my circuit design on this website (see figure 3): http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/opampvar2.html. Just as the figure shows, R1 is my load and I have made R2 just the wire (so that output current is as high as possible).
My qusetion is: what could cause my amplifier to not work when using the meanwell power supply? I really need help.