Datasheet

AUTO DISPLAY REPEAT FUNCTION
First
DisplayPeriod
Internal OscillatorClock
BLANK
OUTn
(GSData=001h)
1 2 3 2047
2048
2049 4094
4095
0 1 2 3 2047
2048
2049 4094
4095
0 1 2 3 0 214096
4095
40942100000
NthDisplayPeriod
Displayperiodisturnedonagain by
theautodisplayrepeatfunction.
OFF
ON
OUTn
(GSData=800h)
OFF
OUTn
(GSData=FFFh)
OFF
ON
ON
GSCounter Value
Second
DisplayPeriod
0 0 0 0
FourInternalClockIntervalsAfterBLANKGoesLow
FourInternalClockIntervals AfterBLANKGoesLow
FirstDisplayPeriod
(4096InternalClock)
SecondDisplayPeriod
(4096InternalClock)
Grayscalecounterstartstocountfromthefifthclock
oftheinternaloscillatorclockafterBLANKgoeslow.
¼ ¼ ¼ ¼ ¼
THERMAL SHUTDOWN (TSD)
ICJunctionTemperature(T )
J
OUTn
(GSData=FFFh)
Internal OscillatorClock
1 2 3 4095
4096
1 2 4095
4096
1 2 4095
4096
1 2 4095
4096
1 2 4095
4096
1 2 4095
4096
1 2
ON
T <T - T
J (TEF) (HYS)
T T³
J (TEF)
OFF
BLANK
T <T - T
J (TEF) (HYS)
T T³
J (TEF)
OFF
ON
OFF
High
Low
TLC5947
www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008
This function can repeat the total display period without any timing control signal, as shown in Figure 21 .
Figure 21. Auto Display Repeat Operation
The thermal shutdown (TSD) function turns off all constant current outputs immediately when the IC junction
temperature exceeds the high temperature threshold (T
(TEF)
= +162 ° C, typ). The outputs will remain disabled as
long as the over-temperature condition exists. The outputs are turned on again at the first clock after the IC
junction temperature falls below the temperature of T
(TEF)
– T
(HYS)
. Figure 22 shows the TSD operation.
Figure 22. TSD Operation
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