TLC59291_16 Datasheet, PDF (15/46 Pages) Texas Instruments – 8/16-Channel, Constant Current LED Driver

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Timing Diagrams (continued)
TLC59291
SLVSA96A – SEPTEMBER 2015 – REVISED MARCH 2016
SIDLD in FC
data latch
01b
(Internal)
BLANK
(working as enable pin)
OUTn current
for LED lighting
High
Set current by external
resistor and BC data
0mA
Low
Programmed output current
0mA
When BLANK signal is High, all output is
forced off even if the IDM on time has not
been passed the selected time.
Selected output current by “IDMCUR”
bit in the function control latch
OUTn current
for IDM
0uA
2/10/20 µA
SID holder
data
(Internal)
Selected on time by IDMTIM bit
in the function control latch.
LOD
Old data
2/10/20 µA
0 µA
LOD data is held in SID holder while
BLANK is high level or the data is held in
SID holder when IDM working time has
passed.
LOD
XXXXh
LOD
XXXXh
16 bit LOD
circuit output
data (Internal)
LOD
0000h
LOD data goes through SID holder while BLANK is low level or IDM working time is not passed.
LOD
XXXXh
LOD
0000h
LOD data is not stable just after BLANK goes low.
LOD
XXXXh
LOD
0000h
LAT
17 bit common
shift register data
(Internal)
Latched output on-off data
SID is loaded into the shift register
Figure 8. IDM Operation Timing with LOD Selected and IDM Enabled
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