I am currently designing a circuit which should be able to take 12-28V DC power in and output 12V DC @ 1.5A.
The question is: is this possible with a 100% duty cycle buck converter (like TPS54302)? What will happen if the input and output voltage are nearly the same?
If this is not possible what options do I have? If it would be ok to drop up to 1V when the input voltage is below 13V, will this make things easier?
Would it be possible to detect a low voltage and bypass the converter if the voltage is too low?