TLC5928_1 Datasheet, PDF (15/28 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with LED Open Detection

TLC5928
www.ti.com...................................................................................................................................................... SBVS120B – JULY 2008 – REVISED OCTOBER 2008
SIN
DATA
0A
DATA DATA DATA DATA DATA
15B 14B 13B 12B 11B
SCLK
LAT
123 45
Shift Register _DATA
LSB Data (Internal) ^0A
Shift Register _DATA
LSB+1 Data (Internal) ^1A
LOD
0
DATA DATA DATA DATA
15B 14B 13B 12B
LOD
1
LOD DATA DATA DATA
0
15B 14B 13B
DATA DATA DATA DATA
3B
2B
1B
0B
13 14 15 16
DATA DATA DATA DATA DATA DATA
15C 14C 13C 12C 11C 10C
12345 6
DATA DATA DATA DATA _{LOD 0A or PTW_A} DATA DATA DATA DATA DATA
3B
2B
1B 0B
15C 14C 13C 12C 11C
DATA DATA DATA
4B
3B
2B
LOD 1A or PTW_A ^{LOD DATA DATA DATA DATA}
0A 15C 14C 13C 12C
Shift Register _{DATA LOD LOD LOD LOD LOD}
MSB 1 Data(Internal) ^14A
14
13
12
11
10
-
Shift Register _{DATA LOD LOD LOD LOD LOD}
MSB Data(Internal) ^1A
15
14
13
12
11
On/Off Control
Latch Data (Internal)
SOUT ^DATA
1A
LOD
15
LOD LOD LOD LOD
14
13
12
11
LOD LOD DATA
1
0
15B
LOD 14A or PTW_A ^{LOD LOD LOD LOD LOD}
13A 12A 11A 10A 9A
LOD LOD LOD DATA _{LOD 15A or PTW_A} LOD LOD LOD LOD LOD
2
1
0 15B
14A 13A 12A 11A 10A
Previous Grayscale Latch Data
Latest Grayscale Latch Data
LOD LOD LOD DATA _{LOD 15A or PTW_A}
2
1
0
15B
LOD LOD LOD LOD LOD
14A 13A 12A 11A 10A
BLANK
OUTn^{(1) OFF}
ON
OFF
ON
OUTn^{(2) OFF}
ON
OFF
ON
OUTn^{(3) OFF}
ON
OFF
ON
OFF
OUTn^{(4) OFF}
ON
OFF
OFF
(1) On/off latched data are '1'.
(2) On/off latched data are changed from '1' to '0' at the second LAT signal.
(3) On/off latched data are changed from '0' to '1' at the second LAT signal.
(4) On/off latched data are '0'.
Figure 18. On/Off Control Operation
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