i have 5v pwm output as controlling voltage of 3.3 v motor!
i also have to use driver for higher current.
i am confused!
which transistor should i use?
will inductor or capacitor require?
If you limit the RMS current then you should be safe from overheating.
If you limit the average voltage then you should be safe from too high RPM.
(for a full bridge driver: limiting the duty cycle to 66% should be safe. 5V x 66% = 3.3V)
A single transistor will work. But expect low torque. --> RPM is not very constant with varying load.
With ohmic loads this is not the problem, but the motor is partely inductive.
if they were not inverted, then both MOSFETs are ON at the same time --> causing short circuit.
Look for a - ready to buy - motor driver, they usually are more rugged because of internal protection functions and they are easy to use.
I don´t recomend to build one with discrete parts.
Building a discrete one often takes more time, is not cheaper, causes more trouble.