Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
ST do high side MOSFETs suitable for use in cars. They even have feedback controls to show any issues such as shorts or overheats and can be driven by a logic signal. They aren't cheap but are pretty well protected against most nasties in the automotive environment.
Have a look here - some interesting high side switches
https://www.st.com/internet/automotive/subclass/1037.jsp
Sorry they should put max current on the 1st page. As I said I did not look at all the data sheets.The VN16 will happily switch 20A at 12v - more than enough for a headlamp.
They have 63 parts listed on that page that handle 20 amps or more (up to 100 amps) - that is almost half of the parts listed on that page.
How much more current do you need ?
YES, I have the head lights in my camper running off IRF4905 55V-74A, you apply 12 v to the gate via a resistor and the FET conducts.Hello,
I was wondering if I can substitute the relay in the car head lighting system with some other device like mosfets or triacs. If it is possible what is the best way to use it?
Thanks!
Why are those values disappointing?If the IRF4905 is a real, high power P channel FET, why don't they say so?
I'm not an engineer so when I see Vdss = -55V and ID= -74A, I go away disappointed.
Thanks a lot Picbits. I have been waiting years for a real high side driver. I think $3.54 for 85 amps is a great price.
https://www.digikey.com/product-detail/en/VN5E010MHTR-E/497-11471-1-ND/2713728
Do you really believe that the TO-220 package can withstand 75A for longer than a second?Why are those values disappointing?
Whats wrong with that?If the IRF4905 is a real, high power P channel FET, why don't they say so?
I'm not an engineer so when I see Vdss = -55V and ID= -74A, I go away disappointed.