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How to build Constant Current PSU

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abicash

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constant current psu

Hi

I am building a CV-CC supply which would output a 50ms pulse of the set output current to a load which would be up to 5 ohms.
I will set a current of 1Amp (using fixed resistor prior to the load) by replacing the load by a short circuit,vary the voltage and then connect the load for actual experiment.
During the 50ms time,how do I ensure that exactly 1A current is flowing irrespective of load value?
I am thinking of varying the voltage,but error correction on output by sensing current feedback will take some time,which will not be permissible.Although the max current will always be limited by the fixed resistor+load resistance
How do I tackle this problem.
 

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