J_M_B
Junior Member level 2
Hi
I have a system with an RC filter in a 6V power rail.
It is 5R and 100uF.
During normal operation the power rating of the 0805 0.125W resistor is fine.
However at power on there is an inrush current of 0.4A for 2ms.
During this 2ms the power in the 0.125W resistor is 0.78W.
As its such a short time -2ms- I am assuming it would just be fine.
Am I correct to assume this?
How could I quantify this in design documentation to confirm it would be fine? (e.g. relating a datasheet specification etc)
I would really appreciate any thoughts anyone has.
Thanks
Jamie
I have a system with an RC filter in a 6V power rail.
It is 5R and 100uF.
During normal operation the power rating of the 0805 0.125W resistor is fine.
However at power on there is an inrush current of 0.4A for 2ms.
During this 2ms the power in the 0.125W resistor is 0.78W.
As its such a short time -2ms- I am assuming it would just be fine.
Am I correct to assume this?
How could I quantify this in design documentation to confirm it would be fine? (e.g. relating a datasheet specification etc)
I would really appreciate any thoughts anyone has.
Thanks
Jamie