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SANKEN ELECTRIC CO., LTD.
LC5540LD-DS
Single-Stage Power Factor Corrected
Off-Line Switching Regulator ICs
LC5540LD Series
January 28, 2013
10
1
0.1
0.01
Transient Thermal Resistance, R
ch-c
(°C/W)
Transient Thermal Resistance Curve
Time (s)
10
–6
10
–5
10
–4
10
–3
10
–2
10
–1
Ambient Temperature, T
A
(°C)
1.2
1.0
0.8
0.6
0.4
0.2
0
0 255075 125100 150
MOSFET Temperature versus Power Dissipation Curve
Allowable Power Dissipation, P
D1
(W)
Channel Temperature, T
ch
(°C)
100
80
60
40
20
0
25 50 75 125100 150
EAS
Temperature Derating Coefficient (%)
MOSFET Avalanche Energy Derating Coefficient Curve
Drain-to-Source Voltage, V
DS
(V)
100
10
1
0.1
0.01
1 10 100 1000
Drain Current, I
D
(A)
MOSFET Safe Operating Area Curve
Drain current limited
by on-resistance
1 ms
0.1 ms
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
T
A
= 25°C, single pulse
Channel Temperature, T
ch
(°C)
100
80
60
40
20
0
0 25 50 75 125100 150
Safe Operating Area
Temperature Derating Coefficient (%)
S. O. A. Temperature Derating Coefficient Curve
Characteristic Performance
LC5548LD
