TLC5930PWPR Datasheet, PDF (16/40 Pages) Texas Instruments – 12-CHANNEL LED DRIVER

TLC5930
SLLS528 – MARCH 2002
PRINCIPLES OF OPERATION
dot correction data
Using this packet, the same dot correction data can be written to all connected devices simultaneously, or
different dot correction data can be written to each device.
The dot correction register latch is configured with 12 output x 8 bit; the current value on each constant output
current can be adjusted in 256 steps as 1 step of 0.4% of current ratio between 100% and 0% when output
current is set to 100% by adjusting external resistor and brightness adjustment data. By using this function,
brightness deviation due to brightness variation of LED can be reduced.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ID
(bin)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _xxxxxxxx
CMD
(bin)
OUT0
00000100 8 bit
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{dt [7]}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ⁰
0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
OUT1
8 bit
dt [6]
0
0
1
1
Table 4. Packet Configuration (112-bit)
OUT2
8 bit
OUT3
8 bit
OUT4
8 bit
DATA
OUT5 OUT6
8 bit 8 bit
OUTn
OUT7
8 bit
dt [5] dt [4] dt [3] dt [2] dt [1] dt [0]
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
OUT8
8 bit
OUT9 OUT10 OUT11
8 bit
8 bit
8 bit
RELATIVE
CURRENT
RATIO (%)
0.0
0.4
.
.
.
99.6
100
IOLC = 40 mA
(mA)
0.0
0.16
.
.
.
39.84
40.00
(xx04xxxxxxxxxxxxxxxxxxxxxxx xh) After ID and CMD, 8 bit data continues 12 output.
color tone correction data
Using this packet, the same color-tone correction data can be written to all the connected devices
simultanoeously or different color tone correction data can be written to each device.
Color tone correction makes correction for color deviation by lighting-ON a little the color of the other LED
simultaneously when wavelength of LED for each RGB is out of alignment from the color required essentially.
The color tone correction function with TLC5930 is configured with color tone correction data packet setting fro
current value corrected per pixel assuming OUT0–OUT2, OUT3–OUT5, OUT6–OUT8 and OUT9–OUT11 as
four pixels, and with color tone correction control packet which controls ON/OFF by OUT0, OUT3, OUT6, OUT9,
and OUT1, OUT4, OUT7, OUT10, and OUT2, OUT5, OUT8, and OUT11 assuming that same color is assigned
for OUT0, OUT3, OUT6, OUT9 and OUT1, OUT4, OUT7, OUT10 and OUT2, OUT5, OUT8, and OUT11
respectively.
The current value for color tone correction set by this packet is set per pixel for OUT0–OUT2, OUT3–OUT5,
OUT6–OUT8, and OUT9–OUT11. In other words, the current value for color tone correction is same in
OUT0–OUT2, OUT3–OUT5, OUT6–OUT8, and OUT9–OUT11.
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