TLC59291_15 Datasheet, PDF (12/45 Pages) Texas Instruments – TLC59291 8/16-Channel, Constant Current LED Driver with 7-bit Brightness Control Low Quiescent Current and Full Self Diagnosis for LED Lamp

TLC59291
SLVSA96 – SEPTEMBER 2015
Timing Diagrams (continued)
SCLK
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LAT
Common Shift
Register Bits[15:0]
(Internal)
Common Shift
Register Bit 16
(Internal)
Output On/Off
Data (Internal)
These data are copied to the on/off data latch at LAT rising edge.
Previous On/Off Data
LOD/TEF Data
0
New Latched GS Data
SIDLD Data _{01 (LOD is selected)}
(Internal)
BLANK ^Low
OFF
All outputs are forced off
by TSD function.
OFF
OUTn
ON
Resumed with T_J
going down.
ON
High
OFF
ON
OFF
Device Junction
Temperature (T_J)
PTW in SID
(Internal Data)
TEF in SID
(Internal Data)
T_J < T_PTW
T_J ³ T_PTW
1
T_J ³ T_TEF
T_J < T_TEF - T_HYST
PTW is not reset at LAT rising edge because SIDLD
does not select LOD. PTW is reset to 0 when the
device junction temperature is less than T_PTW and
SIDLD selects LOD.
T_J < T_PTW
1
0
PTW is set to 1 when device
junction temperature is greater
than T_PTW.
0
TEF is reset to 0at LAT riging edge for
on/off data writing when the device junction
temperature is less than T_TEF and SIDLD
1
selects LOD.
0
TEF is set to 1 when device junction
temperture is grerater than T_TEF.
Figure 6. PTW/TEF/TSD Timing (LOD Selected)
T_J ³ T_PTW
T_J ³ T_TEF
1
1
12
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