LX1995

Microsemi

Integrated Products Division

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

Page 5

Miniature LED Driver

Copyright

© 2000

Rev. 1.1, 2005-07-07

TM

®

APPLI CATI ON CI RCUITS

LX1995

V

IN

SHDN

GND

FB

SW

L

1

10

µH

1206 Case Size

C

1

0.1

µF

R

1

15

Ω

D

1

ON OFF

R

2

11.2k

Ω

R

3

90.9k

Ω

C

2

0.1

µF

R

4

9.09k

Ω

>10kHz

V

DC = 10% to 90%

I

Figure 4 – PWM to Analog Voltage Dimming LED Driver Application

C

1

.1

µF

L

1

10µH

1206 Case Size

LX1995

GND

FB

SW

SHDN

IN

V

On

Off

R

2R

LSB

MSB

320mV

LSB

MSB

11

10

0

1

00

Figure 5 – Binary Dimming LED Driver Application

The component values shown are only examples for a working system. Actual values will vary greatly depending on desired parameters, efficiency, and layout

constraints.