Quote Originally Posted by sougata View Post
Hi,

The SG3525 has an internal 5 volts reference but that is only for the comparator, ramp generator. It has got an internal under voltage lockout function whenever the supply drops below 8 volts (i hope i recalled correct)

The output drivers are designed to directly drive MOSFET gates so if you use a 12 volts regulator to supply the chip. You are good to go. The fast turn-off issue becomes more important when you are switching at a much higher speed. So go ahead with the circuit.
So, could be ok to power the chip with 12V and the motor with 24V through the MosFET?
Please note that I have to run the motor with 24V dc.

Thanks.