Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 9

Copyright

© 2000

Rev. 1.0b, 2005-03-03

LX1993

High Efficiency LED Driver

I N T E GRA T ED

PR ODUC T S

CHARACT ER I S TI C CURVES

190

215

240

265

290

315

340

365

0

1000

2000

3000

4000

Conditions:

Channel 2: Inductor Current (100mA/div.)

50%

55%

60%

65%

70%

75%

80%

85%

1

6

11

16

LED Cur r ent ( mA)

Figure 7: Efficiency vs. LED Output Current.

Note: Data taken from LXE1993 Evaluation Board

50%

55%

60%

65%

70%

75%

80%

85%

90%

1

6

11

16

21

LED Cur r ent ( mA)

Figure 8: Efficiency vs. LED Output Current.

Note: Data taken from LXE1993 Evaluation Board

50%

60%

70%

80%

90%

100%

05

10

15

20

LED Cur r ent ( mA)

Figure 9: Efficiency vs. LED Output Current.

Note: Data taken from LXE1993 Evaluation Board

50%

60%

70%

80%

90%

100%

05

10

15

20

LED Cur r ent ( mA)

Figure 10: Efficiency vs. LED Output Current.

Note: Data taken from LXE1993 Evaluation Board