Right now I have a problem in finding a available power source for charge and discharge of EDLC.
It required to be charge and discharge at a constant current of 30A, and the voltage is about 10 V or so.

Do you think these can work or the current is far too high>
If so, what can I do? I am not familiar with this

 

No one can help? I need to solve this problem today!

 

that chip only puts out 15mA max, when shorted.

 

cirrus makes high power opamps, some of them are for 40A output like PA50 and PA52:
http://www.cirrus.com/en/products/power_operational_amplifiers.html#PA158_stDiv

but those babies are not cheap and you will still need massive heatsink (well, you will need that anyway).

i would add transistors into opamp output and but get feedback after transistors.

 

Here is a constant-current circuit that boosts the current of the op amp, limited only by the size of the N-MOSFET and its heat sink. The constant current equals the voltage applied to the DAC0 Out pin divided by R1.

If you use a single-supply type op amp, such as an LM358, you only need a positive supply voltage. You also don't need the two 5M resistors.

 

Thank you for giving that information....