Effective IC position on Heat sink

[naadbrahma]

for Well heat dissipation which IC position is right (please see image)

 

[avtech]

Some great information here:

ESP - Heatsink design and transistor mounting

 

[JMFahey]

In principle centered is better but centered horizontally and somewhat shifted vertically as in your second option is practically same, since heatsink main body (not the fins) is usually quite thick.

It would be more critical if heatsink were, say,an aluminum back panel which would be much thinner, say 1 or 1.5 mm thick, but I guess your extruded heatsink is at least 2.5 mm thick, a big difference.

 

[sajti]

I would use 1/3 : 2/3 below:above ratio.

Sajti

 

[naadbrahma]

I would use 1/3 : 2/3 below:above ratio.

Sajti

Thanks

 

[naadbrahma]

Some great information here:

ESP - Heatsink design and transistor mounting

Thanks a lot for detail information

 

[naadbrahma]

In principle centered is better but centered horizontally and somewhat shifted vertically as in your second option is practically same, since heatsink main body (not the fins) is usually quite thick.

It would be more critical if heatsink were, say,an aluminum back panel which would be much thinner, say 1 or 1.5 mm thick, but I guess your extruded heatsink is at least 2.5 mm thick, a big difference.

Thank you