LokisMischief
Newbie level 4
Hi all,
Long time lurker here..
I am working on a high side switched discharge circuit and am struggling a little so I will start from scratch here.
What I am looking to do is to deliver a minimum of 2A through a variable resistance, lets say 2Ω to 10 or, ideally, 20Ω for 15-20ms. This only has to happen once within a reasonable time frame, so there could be serveral seconds or tens of seconds to recharge. Ideally I would like a little more current than that however, 4A would be nicer. Voltage hasnt been mentioned because current was more important however a minimum of 12v should probably be stipulated, and in any case vir on the above at 10ohm and 2A would give 20v so we should already be there.
Now, this needs to be high side switched, or even both high and low concurrently, and triggered by TTL so +5v is reasonable.
Given all this, the following was the best I could come up with, does anybody have any input or suggestions on perhaps a much better solution? I also plan to have a number of these circuits on the same pcb or atleast in the same project box, so is there maybe a better way with a common cap bank?
My Attempt
Long time lurker here..
I am working on a high side switched discharge circuit and am struggling a little so I will start from scratch here.
What I am looking to do is to deliver a minimum of 2A through a variable resistance, lets say 2Ω to 10 or, ideally, 20Ω for 15-20ms. This only has to happen once within a reasonable time frame, so there could be serveral seconds or tens of seconds to recharge. Ideally I would like a little more current than that however, 4A would be nicer. Voltage hasnt been mentioned because current was more important however a minimum of 12v should probably be stipulated, and in any case vir on the above at 10ohm and 2A would give 20v so we should already be there.
Now, this needs to be high side switched, or even both high and low concurrently, and triggered by TTL so +5v is reasonable.
Given all this, the following was the best I could come up with, does anybody have any input or suggestions on perhaps a much better solution? I also plan to have a number of these circuits on the same pcb or atleast in the same project box, so is there maybe a better way with a common cap bank?
My Attempt