Off-Line Quasi-Resonant Switching Regulators
STR-X6757
STR-X6757
STR-X6757
MIC TF-PD2 Curve
MOSFET Ta-PD1 Curve
50
1
0.8
0.6
0.4
0.2
0
P
D1=44[W]
45
40
35
30
25
20
15
10
With infinite heatsink
Without heatsink
D1=2.8[W]
P
5
0
0
20 40 60 80 100 120 140
0
20 40 60 80 100 120 140
TF〔℃〕
Ta[℃]
Ambient temperature
Internal frame temperature
STR-X6757
Transient thermal resistance curve
1
0.1
0.01
0.001
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
t [sec]
time
Allegro MicroSystems, Inc.
115 Northeast Cutoff
5
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com