RT9173AGM5 데이터 시트보기 (PDF) - Richtek Technology
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RT9173AGM5 Datasheet PDF : 13 Pages
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RT9173/A
can be calculated as :
PD(MAX) = (125°C - 25°C) / (29°C/W) = 3.45W (TO-263-5)
Figure 11 and Figure 12 of power dissipation vs. copper
area allow the designer to see the effect of rising ambient
temperature on the maximum power allowed.
Power Dissipation vs. Copper Area
100
2S2P thermal test
90 board
80
70
TA = 65°C
TA = 55°C
60
50
TA = 25°C
40
30
20
10
0
0
SOP-8
0.5
1
1.5
2
2.5
3
Power Dissipation (W)
Figure 11. Power Dissipation vs. Copper Area of SOP-8
Package
Cooper Area vs. Power Dissipation
400
2S2P thermal test
350 board
300
250
200
150
100
TA = 65°C TA = 55°C TA = 25°C
50
TO-263-5
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Power Dissipation (W)
Figure 12. Power Dissipation vs. Copper Area of
TO-263-5 Package
www.richtek.com
10
DS9173/A-18 March 2007
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