- Tue Oct 21, 2008 3:36 am
#57459
Hello,
I am trying to drive a high side mosfet switch using a logic level signal from a USB power line... when the USB power is present, I want to shut off the other power source. When the usb is not present, I need to have the mosfet conducting to allow power from this other source.
The other power source has a max input voltage of 60V, so I need some kind of driver to control the mosfet.
I'm looking at the Linear LTC4440-5, but I just not quite sure how to wire it up, maybe I'm looking at the wrong kind of driver?
I am trying to drive a high side mosfet switch using a logic level signal from a USB power line... when the USB power is present, I want to shut off the other power source. When the usb is not present, I need to have the mosfet conducting to allow power from this other source.
The other power source has a max input voltage of 60V, so I need some kind of driver to control the mosfet.
I'm looking at the Linear LTC4440-5, but I just not quite sure how to wire it up, maybe I'm looking at the wrong kind of driver?