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| TLC5930PWPR Datasheet, PDF (8/40 Pages) Texas Instruments – 12-CHANNEL LED DRIVER | |||
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TLC5930
SLLS528 â MARCH 2002
TIMING DIAGRAMS
5.1 kâ¦
VCC
VCC
IREF OUTn
GND
56 â¦
15 pF
VIH
VIL
tR
Figure 1. Rise Time and Fall Time Test Circuit for OUTn
90%
10%
50%
50%
VIH or VOH
VIL or VOL
tF
txxxx
50%
50%
Figure 2. Timing Requirements
VIH or VOH
VIL or VOL
PRINCIPLES OF OPERATION
setting for constant output current value
On the constanct current output terminals (OUT0 to OUT11), approximately 168 times the current that flows
through the external resistor, RIREF, (connected between IREF and GND) can flow. The external resistor value
is calculated using the following equation:
R(IREF)
(W)
+
168 1.23
IO(LC) (A)
V
(1)
where R(IREF) should be ⤠4.88 kâ¦
Note that more current flows if IREF is connected directly to GND.
8
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