Hi,
I am trying to get a current limiter with a delay working. (feeding a dc dc **broken link removed**)
At the moment it works without the delay section in. Limits to around 130mA. However with the delay part in, it delays the start correctly, but then doesn't start the DC-DC correctly. It kind of clicks on, clicks off, clicks on, clicks off. Almost like the MOSFET isn't closing enough when current gets drawn.
Can anyone see anything that would make this circuit work correctly?
I have also tried a 2N7000 but that does not work either.
http://i47.tinypic.com/142yc6h.jpg
Thanks for any help
I am trying to get a current limiter with a delay working. (feeding a dc dc **broken link removed**)
At the moment it works without the delay section in. Limits to around 130mA. However with the delay part in, it delays the start correctly, but then doesn't start the DC-DC correctly. It kind of clicks on, clicks off, clicks on, clicks off. Almost like the MOSFET isn't closing enough when current gets drawn.
Can anyone see anything that would make this circuit work correctly?
I have also tried a 2N7000 but that does not work either.
http://i47.tinypic.com/142yc6h.jpg
Thanks for any help