I need a SEPIC converter with the following characteristics
Vin(min) = 11V
Vin(max) = 30V
Vout = 12V
Iout (max) = 2A
f = 100khz - 300khz
found design with LT3759 chip ANALOG DEVICES [login to view URL] i dont know if its an high cost design or not and good quality or no too and Analog devices parts are now not used very much in professional design ?
and other think i see some board use regulator like LM2678, LM2596 .... maybe we should ensure that the input voltage is higher than the output but if the input was 12.8v and ouput was 11v its not a problem i can get my 3.3v and 5v from this output ...
Thank you in advance.