Moonwalker031
Electrical
- Jun 5, 2010
- 33
I have a simple circuit for controlling the speed of a 12V 10A dc motor using 1 mosfet on the low side. For cost reduction I opted for no heatsink and chose a mosfet with the lowest RDSon. This worked well with no much heating.
However I am getting a lot of heat in the flyback diode. I tested different types HER602, MUR820, MUR1620 but all of them heated up after a few minutes. Since all diedes have a forward drop of about 1V, I cant think of a way to solve this without adding a heatsink.
Any help please?
However I am getting a lot of heat in the flyback diode. I tested different types HER602, MUR820, MUR1620 but all of them heated up after a few minutes. Since all diedes have a forward drop of about 1V, I cant think of a way to solve this without adding a heatsink.
Any help please?