Hi All,
I have a circuit on the bench. Boost circuit using a LM3488. I have set this circuit up on the bench, it's a 1.0 amp constant current supply. I am getting some unexpected results, the FB pin from the op-amp circuit should be around 1.275v when the current is 1.0 amps through the load. Instead, the load current reaches 1.7 amps and the FB signal is about 1.46v . My op-amp and shunt circuit is working fine, shouldn't the output voltage stop climbing when the FB reaches 1.275v? What advantage does the LM3481 have over this chip in my application? I'm switching to the LM3481 per this forums advice, I see I will be able to adjust for the under voltage situation, that's good. will I still have the over current situation? Any advice would be super, thank.
