Hi,
I am interfacing a few motors and a microcontroller. I am using a MOSFET driver MIC 4427YN and a PIC18. Data sheet is here.
I burned one somehow last week so I am being more careful. I am noticing that driver heats up significantly after about 15 sec. I think this must be normal?
My battery source is 12V and the motors are drawing 350mA at first, and it smoothes down to 120mA in a second.
I am reading the data sheet for power Dissipation on page 7 and it has some formulas, such as P = I² * R and P = f * C * V² for capacitive loads. I am clueless on the more complicated one. I have two capacitors to smooth the power drops so the microcontroller doesn't restart.
Can you help me figure out the math and see how hot the controller will get and if it will burn?
Thanks,
-George
I am interfacing a few motors and a microcontroller. I am using a MOSFET driver MIC 4427YN and a PIC18. Data sheet is here.
I burned one somehow last week so I am being more careful. I am noticing that driver heats up significantly after about 15 sec. I think this must be normal?
My battery source is 12V and the motors are drawing 350mA at first, and it smoothes down to 120mA in a second.
I am reading the data sheet for power Dissipation on page 7 and it has some formulas, such as P = I² * R and P = f * C * V² for capacitive loads. I am clueless on the more complicated one. I have two capacitors to smooth the power drops so the microcontroller doesn't restart.
Can you help me figure out the math and see how hot the controller will get and if it will burn?
Thanks,
-George