Linear Technology DC1608A Demo Manual

Description
Demonstration circuit 1608A features the LT
16-channel 50mA LED driver with buck controller and
serial interface. Each channel has an individually adjustable
12-bit (4096-step) grayscale PWM dimming control and
a 6-bit (64-step) dot correction current adjustment. Both
dimming control and current adjustment are accessible
via a 30MHz cascadable serial data interface. Individual
open/short LED and overtemperature flags are sent back
during status read back.
Three LT3745's are connected in series to control 16 RGB
LEDs stuffed on the demo board. Each IC drives a separate
color. The evaluation software installed in a host computer
perForMAnce sUMMArY
SYMBOL PARAMETER
V Input Supply Range
IN
V Precharge Voltage (Red)
OUT-R
V Precharge Voltage (Green)
OUT-G
V Precharge Voltage (Blue)
OUT-B
f Free-Running Switching Frequency
S
DEMO MANUAL DC1608A
16-Channel LED Driver
3745, communicates with the DC1608A via the interface board
®
DC590B, an USB serial controller.
The LT3745 data sheet gives a complete description of
the part, its operation and application information. The
datasheet must be read in conjunction with this quick start
guide for working on or modifying the demo circuit 1608A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Specifications are at T = 25°C.
A
CONDITIONS
LT3745
MIN TYP MAX
9 40
3.4
4.2
4.2
400
UNITS
V
V
V
V
kHz
dc1608af
1