ENA2290 datasheet(18/20 Pages) ONSEMI

18 / 20 page

STK984-090A-E

NoA2290-18/20

Method of Fixation of Hybrid-IC

Mount on a Heat Sink

Item

Recommended Condition

Pitch

55.7±0.1mm (Please refer to Package Outline Diagram)

Screw

diameter : M3

Bind machine screw, Truss machine screw, Pan machine screw

Washer

Plane washer

The size is D:7mm, d:3.2mm and t:0.5mm (Fig.2) JIS B 1256

Heat sink

Material : copper or Aluminum

Warpage (the surface that contacts H-IC) :

50 to 100 μm

Screw holes must be countersunk.

No contamination on the heat sink surface that contacts H-IC.

Torque

Final tightening : 0.6 to 0.9Nm

Temporary tightening : 20 to 30 % of final tightening

Grease

Silicon grease

Thickness : 100 to 200 μm

Uniformly apply silicon grease to whole back. (Fig.3)

Fig 2 : size of washer

 About procedure for mount HIC on a Heat Sink

1st : Temporarily tighten maintaining a left/right balance.

2nd : Finally tighten maintaining a left/right balance.

* Make 2nd the same as 1st.

(example : 1st  → , 2nd  → )

Fig 3 : About uniformly application

HIC



screw

washer

grease

Fig 1 : mount HIC on a Heat Sink





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