SC620_07 Datasheet, PDF (11/18 Pages) Semtech Corporation – Octal LED Driver, General Purpose Current Sink with Serial Interface

SC620
Applications Information (continued)
Application Circuit Examples
Main Backlight Plus Sub-panel Backlight Plus Single
RGB LED
This 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 V supply is typically single cell
IN
Li-Ion or 5.0V. V supply and LED anode voltage may
IN
be from different sources. The operating voltage limit of
(V — 1.5V) at the sink pins must be observed to achieve
IN
the specified accuracy of the device.
Battery
LED Backlighting
Main Panel
Sub Panel Color/R/G/B LEDs
1μF
SCL
SDA
EN
2 _IN
SC620
ILED1
5
11 _SCL
ILED2 ⁶
10 _SDA
ILED3 ⁷
3 _EN
ILED4 ⁸
1 _GND
ILED5 ¹³
4 _GND
ILED6 ¹⁴
9 _GND
ILED7 ¹⁵
12 _GND
ILED8 ¹⁶
11