5

SANKEN ELECTRIC CO., LTD.

LC5550LD-DS

Single-Stage Power Factor Corrected

High Efficiency Non-Isolated Buck LED Driver

LC5550LD

Series

July 9, 2012

10

1

0.1

0.01

Transient Thermal Resistance Curve

Time (s)

Ambient Temperature, TA (°C)

1.2

1.0

0.8

0.6

0.4

0.2

0

0

255075

125

100

150

MOSFET Temperature versus Power Dissipation Curve

Channel Temperature, Tch (°C)

100

80

60

40

20

0

25

50

75

125

100

150

MOSFET Avalanche Energy Derating Coefficient Curve

Drain-to-Source Voltage, VDS (V)

10

1

0.1

0.01

1

10

100

1000

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

Channel Temperature, Tch (°C)

100

80

60

40

20

0

S. O. A. Temperature Derating Coefficient Curve

0

255075

125

100

150

Characteristic Performance

LC5555LD