參數(shù)資料
型號(hào)： UPC16318
英文描述： Useage of Three-Terminal Regulators | User＇s Manual[05/2000]
中文描述： 使用三端穩(wěn)壓器|用戶手冊(cè)[05/2000]
文件頁(yè)數(shù)： 25/35頁(yè)
文件大小： 187K
代理商： UPC16318
User’s Manual G12702EJ8V0UM00
31
Precautions when installing in a heatsink
Make the convexity or concavity of the part installation surface of the heatsink 0.05 mm
or less.
Spread silicon grease to a uniform thickness between the heatsink and part. Determine
the kind of grease on consulting the maker of the heatsink.
Painting the heatsink black increases its effectiveness in radiating heat. However, if it is
close to a heat source, it has the reverse effect of absorbing heat.
Use one of the insulating board bushings shown in Table 6-2.
Cut a screw in a heatsink and absolutely do not use self-tapping screws to install one.
When installing a heatsink, if the tightening torque of a screw is too great, the fins can be distorted and the IC
damaged. Drive screws using a torque driver that can manage the tightening torque.
Table 6-1. Three-Terminal Regulator Tightening Torque
Markings
Tightening torque (N
m)
TO-126
2.0
× 103 to 4.1 × 103
TO-220
3.1
× 103 to 5.1 × 103
MP-45G
3.1
× 103 to 5.1 × 103
Figure 6-6. Standard Installation Method for Heatsink Insulation
3 M screw
Flat washer
3 M screw
Flat washer
Spring washer
3 M nut
Insulating board
Insulating bushing
Spring washer
3 M nut
MP-45G
TO-220
Heatsink
Table 6-2. Recommended Insulating Bushings and Insulating Board
Quality of Materials
Code No.
Product Name
Material
Color
Incombustibility
Grade
Insulating bushing
B-24
25K bushing U
Gelanex 3310
Light brown
UL 94V-0
Insulating board
S-7
MP-25 insulating board A
Polyester
Colorless, transparent
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