current sensing for high voltage supply

[Eva]

Originally posted by sss


few amps @ 250V

Eva:
i can use sense resistor , but not with the ground lead , only with the Vcc lead

Why you can't insert a small shunt in the range of 0.025 ohm in the ground lead?

Also, have you considered using the Vcc lead as the ground for whatever control circuit you are employing?

[odnaizutra]

Hi Peranders,
I saw allegro`s site ,
I think is the kind of easy and fast solution of current sense.
Have you had the opportunity to test one of Them?How they perform?What was your max current?
tks

[odnaizutra]

Hi Eva,
have you had any significant increase in mosfet ripple inserting this kind of shunt resistor?
Did you use ,sometime ago,cooper or brass barr as shunt ?How about the performance?

[sss]

Originally posted by Eva


Why you can't insert a small shunt in the range of 0.025 ohm in the ground lead?

Also, have you considered using the Vcc lead as the ground for whatever control circuit you are employing?

its a bit complicated , had to do it for my work ...
floating ground circuit is not an option also
Eva can u please answer my 2nd question in my other thread on this page , u are the only one who can

peranders:
yes , i saw it , looks pretty cool , but its in a smd package

hate 'em !