TLC59283 Datasheet, PDF (16/25 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with Pre-Charge FET

TLC59283
SBVS199A – JUNE 2012 – REVISED JUNE 2012
SCLK
SIN
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
LAT
BLANK
D0
OUT0
OUT1
D1
OUT2
D2
D3
OUT3
www.ti.com
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OUT15
OFF
D15
ON
SOUT
Don’t Care
D15
Figure 22. Operation Timing Diagram
NOISE REDUCTION
Large surge currents may flow through the device and board if all 16 outputs turn on or off simultaneously. These
large current surges can induce detrimental noise and electromagnetic interference (EMI) into other circuits. The
TLC59283 independently turns on or off the outputs for each group with a 1-ns (typ) delay time; see Figure 11.
The 16 outputs are grouped into nine groups of either one or two outputs: group 1 (OUT0), group 2 (OUT1 and
OUT15), group 3 (OUT2 and OUT14), group 4 (OUT3 and OUT13), group 5 (OUT4 and OUT12), group 6 (OUT5
and OUT11), group 7 (OUT6 and OUT10), group 8 (OUT7 and OUT9), and group 9 (OUT9). Both turn-on and
turn-off times are delayed when BLANK transitions from low to high or high to low. Also when output-on and -off
data are changed at the LAT rising edge while BLANK is low, both turn-on and turn-off times are delayed.
However, the state of each output is controlled by the data in the output on or off data latch and the BLANK
level.
16
Submit Documentation Feedback
Product Folder Link(s): TLC59283
Copyright © 2012, Texas Instruments Incorporated