Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

SI7634BDP-T1-GE3 Fiches technique(PDF) 10 Page - Vishay Siliconix

No de pièce SI7634BDP-T1-GE3
Description  N-Channel 30-V (D-S) MOSFET
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  VISHAY [Vishay Siliconix]
Site Internet  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

SI7634BDP-T1-GE3 Fiches technique(HTML) 10 Page - Vishay Siliconix

Back Button SI7634BDP-T1-GE3 Datasheet HTML 5Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 6Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 7Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 8Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 9Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 10Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 11Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 12Page - Vishay Siliconix SI7634BDP-T1-GE3 Datasheet HTML 13Page - Vishay Siliconix  
Zoom Inzoom in Zoom Outzoom out
 10 / 13 page
background image
Vishay Siliconix
AN821
Document Number 71622
28-Feb-06
www.vishay.com
3
THERMAL PERFORMANCE
Introduction
A basic measure of a device’s thermal performance is
the junction-to-case thermal resistance, R
θ
jc, or the
junction-to-foot thermal resistance, R
θ
jf. This parameter
is measured for the device mounted to an infinite heat
sink and is therefore a characterization of the device
only, in other words, independent of the properties of the
object to which the device is mounted. Table 1 shows a
comparison of the DPAK, PowerPAK SO-8, and stan-
dard SO-8. The PowerPAK has thermal performance
equivalent to the DPAK, while having an order of magni-
tude better thermal performance over the SO-8.
Thermal Performance on Standard SO-8 Pad Pattern
Because of the common footprint, a PowerPAK SO-8
can be mounted on an existing standard SO-8 pad pat-
tern. The question then arises as to the thermal perfor-
mance of the PowerPAK device under these conditions.
A characterization was made comparing a standard SO-8
and a PowerPAK device on a board with a trough cut out
underneath the PowerPAK drain pad. This configuration
restricted the heat flow to the SO-8 land pads. The
results are shown in Figure 5.
Because of the presence of the trough, this result sug-
gests a minimum performance improvement of 10 °C/W
by using a PowerPAK SO-8 in a standard SO-8 PC
board mount.
The only concern when mounting a PowerPAK on a
standard SO-8 pad pattern is that there should be no
traces running between the body of the MOSFET.
Where the standard SO-8 body is spaced away from the
pc board, allowing traces to run underneath, the Power-
PAK sits directly on the pc board.
Thermal Performance - Spreading Copper
Designers may add additional copper, spreading cop-
per, to the drain pad to aid in conducting heat from a
device. It is helpful to have some information about the
thermal performance for a given area of spreading cop-
per.
Figure 6 shows the thermal resistance of a PowerPAK
SO-8 device mounted on a 2-in. 2-in., four-layer FR-4
PC board. The two internal layers and the backside layer
are solid copper. The internal layers were chosen as
solid copper to model the large power and ground
planes common in many applications. The top layer was
cut back to a smaller area and at each step junction-to-
ambient thermal resistance measurements were taken.
The results indicate that an area above 0.3 to 0.4 square
inches of spreading copper gives no additional thermal
performance improvement. A subsequent experiment
was run where the copper on the back-side was
reduced, first to 50 % in stripes to mimic circuit traces,
and then totally removed. No significant effect was
observed.
TABLE 1.
DPAK and PowerPAK SO-8
Equivalent Steady State Performance
DPAK
PowerPAK
SO-8
Standard
SO-8
Thermal
Resistance R
θ
jc
1.2 °C/W
1.0 °C/W
16 °C/W
Figure 5. PowerPAK SO-8 and Standard SO-0 Land Pad Thermal Path
Si4874DY vs. Si7446DP PPAK on a 4-Layer Board
SO-8 Pattern, Trough Under Drain
Pulse Duration (sec)
0.0001
0
1
50
60
10
10000
0.01
40
20
Si4874DY
Si7446DP
100
30
Figure 6. Spreading Copper Junction-to-Ambient Performance
Rth vs. Spreading Copper
(0 %, 50 %, 100 % Back Copper)
0.00
56
51
46
41
36
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
0 %
50 %
100 %


Numéro de pièce similaire - SI7634BDP-T1-GE3

FabricantNo de pièceFiches techniqueDescription
logo
Vishay Siliconix
SI7634BDP-T1-GE3 VISHAY-SI7634BDP-T1-GE3 Datasheet
360Kb / 13P
   N-Channel 30 V (D-S) MOSFET
01-Jan-2022
More results

Description similaire - SI7634BDP-T1-GE3

FabricantNo de pièceFiches techniqueDescription
logo
Vishay Siliconix
SI3456DV VISHAY-SI3456DV Datasheet
61Kb / 4P
   N-Channel 30-V (D-S) MOSFET
Rev. B, 23-Nov-98
SUU50N03-12P VISHAY-SUU50N03-12P Datasheet
60Kb / 4P
   N-Channel 30-V (D-S) MOSFET
Rev. A, 15-Sep-03
SI4894DY VISHAY-SI4894DY Datasheet
129Kb / 3P
   N-Channel 30-V (D-S) MOSFET
17-May-04
SI4406DY VISHAY-SI4406DY Datasheet
38Kb / 4P
   N-Channel 30-V (D-S) MOSFET
Rev. C, 26-May-03
SI7380DP VISHAY-SI7380DP Datasheet
180Kb / 3P
   N-Channel 30-V (D-S) MOSFET
24-May-04
SI733ADP VISHAY-SI733ADP Datasheet
61Kb / 5P
   N-Channel 30-V (D-S) MOSFET
Rev. A, 25-Oct-04
SI4892DY VISHAY-SI4892DY Datasheet
71Kb / 4P
   N-Channel 30-V (D-S) MOSFET
Rev. F, 01-Aug-05
logo
Vaishali Semiconductor
SI4356ADY VAISH-SI4356ADY Datasheet
143Kb / 3P
   N-Channel 30-V (D-S) MOSFET
logo
Vishay Siliconix
SIRA00DP VISHAY-SIRA00DP Datasheet
513Kb / 13P
   N-Channel 30 V (D-S) MOSFET
Rev. A, 13-Feb-12
SIRA04DP VISHAY-SIRA04DP Datasheet
513Kb / 13P
   N-Channel 30 V (D-S) MOSFET
Rev. A, 13-Feb-12
SIRA14DP VISHAY-SIRA14DP Datasheet
513Kb / 13P
   N-Channel 30 V (D-S) MOSFET
Rev. A, 12-Mar-12
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com