I want to build a 12v to 14v converter with LM2577T-Adj but i found 12v to 16v scheme diagram, any one can help what part i should chance to...?
in this scheme to make 12v to 14v output...?
Reduce R1 [12k] to about 10.5K.
This is the Vsamp feedback to the switcher.
Look at the Vout formula [near the Vout terminal]
Vout = 1.23 * [1 + 10.5/1] = 1.23 * 11.5 = 14.14Vout.........OK?
Hero may be right here. But if you still want to do this, go to National's website and run their WebBench software. You can design and simulate your circuit before building it. It will assist with all the parts values.The chances are the device will work from 12V so a 14V supply is not required...