Microsemi

Linfinity Microelectronics Division

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

Page 4

Copyright

© 2000

Rev. 1.1b, 2005-03-03

LX1992

High Efficiency LED Driver

TM

®

APPLI CATI ON CI RCUITS

Typical LED Driver Applications

C

1

L

1

1206 Case Size

LX1992

GND

FB

CS

DRV

SHDN

IN

ADJ

SRC

R

SET

15Ω

V

ON OFF

V

I

R

CS

Figure 1

– LED Driver with Full-Range Dimming Via PWM Input

C

1

L

1

1206 Case Size

LX1992

GND

FB

CS

DRV

SHDN

IN

ADJ

SRC

R

SET

15Ω

V

ON OFF

V

I

V

+

-

R

CS

Figure 2

– LED Driver with Full-Range Dimming Via Analog Voltage Input

Note

: The component values shown are only examples for a working system. Actual values will vary greatly depending on

desired parameters, efficiency, and layout constraints.