Exo
Active Member
I'm using a L6203 (sgs, **broken link removed** )
to drive a DC motor for a sattelite dish positioning system. Now i want to add overcurrent protection...
The device can handle up to 4A, So i thought of adding a current sensing resistor in series with the supply and measuring the voltage drop,...
But here's the problem, The motor's startup current can be a lot bigger then 4A, so my system would trigger and deactivate the chip every time it starts up, so i need something that would allow a bigger startup current for a short time...
I thought of just disabling the protection for 1 second or so on startup, but then there wouldn't be any protection for the first second if there was a real short circuit and my chip would blow ...
So, does anyone have an idea on how to do this ...
to drive a DC motor for a sattelite dish positioning system. Now i want to add overcurrent protection...
The device can handle up to 4A, So i thought of adding a current sensing resistor in series with the supply and measuring the voltage drop,...
But here's the problem, The motor's startup current can be a lot bigger then 4A, so my system would trigger and deactivate the chip every time it starts up, so i need something that would allow a bigger startup current for a short time...
I thought of just disabling the protection for 1 second or so on startup, but then there wouldn't be any protection for the first second if there was a real short circuit and my chip would blow ...
So, does anyone have an idea on how to do this ...