Mounting Instructions for EconoPACK+ Modules

APPLICATION
NOTE
Date: 2002-02-25
Page 1 of 5
AN-Number: AN2002-02
Mounting of
EconoPACK+ Modules
The contact surface of module and heatsink must be free from damage and contamination. A thin and uniform film of thermal grease ( typ. thickness 50 - 100 µm ) should be
applied to the contact area before mounting. A recommended method is applying the
thermal grease with rollers or spatulas to the surface of the module or the heatsink. The
quality of thermal grease is sufficient if a small rim can be observed around the mounted
module. Excessive grease will be pressed out. In the contact area of the module of the
heatsink the roughness of the heatsink must not exceed 10 µm and the flatness must not
exceed 50 µm.
All M5 fixing screws for mounting the module to the heatsink has to be uniformly tightened
with the specified mounting torque of 3 up to 6 Nm. For a good thermal contact to the
heatsink we recommend the following procedure of tightening the 8 screws:
1.
Screws hand-screwed with 0,5 Nm in the following sequence:
screw no. 2-6-3-7-4-8-1-5
2.
Screws tightening with 3 up to 6 Nm in the same sequence:
screw no. 2-6-3-7-4-8-1-5
1
2
3
4
M5
M 2,5
M6
8
7
An Infineon Technologies Company
6
5
eupec GmbH
Max-Planck-Straße 5
D-59581 Warstein
Autor: Robert Severin
Tel. +49(0)2902 764-1194
Fax +49(0)2902 764-1150
[email protected]
www.eupec.com
Mounting of
EconoPACK+ Modules
Date: 2002-02-25
Page 2 of 5
AN-Number: AN2002-02
For connecting the power terminals use M 6 screws with a mounting torque of 3 up to 6
Nm. The effective length of the screws for the power terminals should be 6,5 mm to 10
mm. For selecting the screw you have to add the thickness of the busbar to the effective
length.
The busbar has to be connected to the power terminals in such a way that only a low
force is applied to them, even during shock or vibration conditions.
busbar
F
0026
X
X - 0,5 mm
to be minimized,
heatsink
optimum: 20 mm up to 30 mm
The power terminals can withstand this force F best in the direction from the terminal to
the baseplate. Force to other directions has to be avoided. This has also to be considered
in the tolerance of the busbar. See drawing as example for ideal mounting condition.
eupec GmbH
Max-Planck-Straße 5
D-59581 Warstein
Autor: Robert Severin
Tel. +49(0)2902 764-1194
Fax +49(0)2902 764-1150
[email protected]
www.eupec.com
An Infineon Technologies Company
Mounting of
EconoPACK+ Modules
Date: 2002-02-25
Page 3 of 5
AN-Number: AN2002-02
PCB`s can be fixed directly on the module on the 8 standoffs with metric screws M 2,5
mm. The effective length of the screws should exceed 4 mm for light PCB`s and exceed 7
mm for heavy PCB`s. The thread is taped by the screw itself. Therefore a mounting torque
less than 0,5 Nm is necessary. If bending moments are applied to the PCB stacks, separate stand-offs are required.
For connecting the auxiliary pins to the PCB we recommend a soldering process ( wave
soldering, hand soldering ).
Take into account that the first
1,5 mm of the designated dome
act as guide way and will not
transfer any force.
eupec GmbH
Max-Planck-Straße 5
D-59581 Warstein
Autor: Robert Severin
Tel. +49(0)2902 764-1194
Fax +49(0)2902 764-1150
[email protected]
www.eupec.com
An Infineon Technologies Company
Mounting of
EconoPACK+ Modules
Date: 2002-02-25
Page 4 of 5
AN-Number: AN2002-02
* < 100 N
< 100 N
< 100 N
*
< 1000 N
= maximum force for a short time during mounting
It is important that no high tractive force is applied in any way to the connecting points of
the module power terminals. It must be achieved that a strong fixing point e.g. for the
motor cable is created, so that the mounting and application relevant forces will take effect only to this strong fixing block and not to the EconoPACK + module.
eupec GmbH
Max-Planck-Straße 5
D-59581 Warstein
Autor: Robert Severin
Tel. +49(0)2902 764-1194
Fax +49(0)2902 764-1150
[email protected]
www.eupec.com
An Infineon Technologies Company
Mounting of
EconoPACK+ Modules
Date: 2002-02-25
Page 5 of 5
AN-Number: AN2002-02
Example for optimized mounting conditions
copper
plastic fixingblock
0026
screw
cable lug
heatsink
cable
copper
module
cable
plastic fixingblock
cable lug
screw
heatsink
eupec GmbH
Max-Planck-Straße 5
D-59581 Warstein
Autor: Robert Severin
Tel. +49(0)2902 764-1194
Fax +49(0)2902 764-1150
[email protected]
www.eupec.com
An Infineon Technologies Company