current source,4-5A

Want to use the op amp to set up a constant current source with output current of 4-5A, the power supply of the op amp can be ± 12V or 5V. Is there any recommended circuit

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  • Thank you,Alex. I have realized the function of 5A current with OP07.Now I want to make a 15A constant current source, which is not realized with OP07 and the current is not stable. I hope you can recommend the relevant circuit.Specific requirements are as follows:

    1. sinking current to ground, Lithium battery discharge (29V) ,15A current.

    2.current fixed

    3.Current accuracy within 5%.

    4.load: Resistive load 1-2.5 ohms

    5.output:Lithium battery 29V, MAX30V

    6.transistor:used MOS IRF540, shunt resistor 5 Ω。

    I have read the data manual of LT1492, there is a recommended circuit on it, I don't know whether it works or not.If you have a better recommendation circuit or better information,I would appreciate it。

    Thank you !