cancel
Showing results for 
Search instead for 
Did you mean: 

PSoC 4 MCU

New Contributor

Hello,

I need a constant current source between 0 - 75mA. My idea was to connect three OPs of the PSOC 4 parallel. As current source i would use the IDAC. I add a frist schematic as appendix.

The values of the resistors in the schematic are not correct. It's only a idea, when the thing is working i will calculate the correct values.

Have a good day...

Bye bye

0 Likes
Reply
1 Solution
Honored Contributor II

MoKa,

PSoC devices are not a power source, for 75 ma output you need external power component, like a FET. Also, output voltage of Opamp based current source will be lower than ~3V.

Please take a look on schematics in this thread (current sink)

5LP as constant current sink controller

And this one (current source)

How built a 4-20 mA IDAC

/odissey1

View solution in original post

0 Likes
Reply
1 Reply
Honored Contributor II

MoKa,

PSoC devices are not a power source, for 75 ma output you need external power component, like a FET. Also, output voltage of Opamp based current source will be lower than ~3V.

Please take a look on schematics in this thread (current sink)

5LP as constant current sink controller

And this one (current source)

How built a 4-20 mA IDAC

/odissey1

View solution in original post

0 Likes
Reply