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Best buck controller IC's for constant current power supply

Other Parts Discussed in Thread: LM5145, LM5149, LM5148

Good morning, i need to design a constant current power supply with the following specs:

V input: 60V 

Vout: 0-48V


 I need it to be adjustable and i was thinking about using an LM5145 and change the feedback loop to make it work in constant current mode. After many simulations with PSPICE i dont have a good result, so im wondering if there are more suitable IC's for this purpose.

Thank you.