Application Examples

Battery

SC620

VIN

2

SCL

11

SDA

10

EN

3

GND

1

GND

4

GND

9

GND

12

ILED1

5

ILED2

6

ILED3

7

ILED4

8

ILED6

14

ILED7

15

ILED8

16

ILED5

13

Sub Panel

Color/R/G/B LEDs

1μF

SCL

SDA

EN

Main Panel

LED Backlighting

Main Backlight Plus Sub-panel Backlight Plus Single RGB LED

Example Circuit

This application example uses the SC620 to drive a

main display, a sub-panel display and an RGB LED.

Independent outputs allow these functions to

be

supported simultaniously at different intensities. The VIN

supply is typically single cell Li-Ion or 5.0V. VIN supply

and LED anode voltage may be from different sources.

The operating voltage limit of [VIN - 1.5V] at the sink pins

must be observed to achieve the specified accuracy of the

device.

12

© 2006 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC620