Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Could this SMPS controller be damaged by being screwed too tightly to its heatsink?

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,980
Helped
586
Reputation
1,175
Reaction score
566
Trophy points
1,393
Location
cambridge
Activity points
78,633
FSCQ1565

...Its a flyback controller with internal FET. Assumedly the circuitry is in the body, and not in the screw holed tab, so no matter how tightly it was screwed to a heatsink, it could not be damaged to the point where it would suffer electrical failure (by being screwed too tightly to the heatsink)?

Its basically a TO220 package with multiple legs.
 

crutschow

Advanced Member level 5
Joined
Feb 22, 2012
Messages
3,858
Helped
920
Reputation
1,838
Reaction score
907
Trophy points
1,393
Location
L.A. USA Zulu -8
Activity points
21,795
FSCQ1565

...Its a flyback controller with internal FET. Assumedly the circuitry is in the body, and not in the screw holed tab, so no matter how tightly it was screwed to a heatsink, it could not be damaged to the point where it would suffer electrical failure (by being screwed too tightly to the heatsink)?

Its basically a TO220 package with multiple legs.
I would say, in general, that's true.
To get a good thermal contact to the heat-sink you should always use a thin layer of thermal grease between the tab and heat-sink of course.
 

Easy peasy

Advanced Member level 5
Joined
Aug 15, 2015
Messages
3,041
Helped
1,116
Reputation
2,232
Reaction score
1,155
Trophy points
113
Location
Melbourne
Activity points
16,822
there is a remote chance that extreme overtightening could put stress on the die - esp if the hole is oversized and the screw is slightly undersized
 

LaTeX Commands Quick-Menu:

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top