TLC5944 Datasheet, PDF (13/34 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

TLC5944
www.ti.com ...................................................................................................................................................................................................... SBVS112 – JUNE 2008
TYPICAL CHARACTERISTICS
At V_CC = 3.3 V and T_A = +25°C, unless otherwise noted.
REFERENCE RESISTOR vs OUTPUT CURRENT
100000
24300
10000
9750
1000
4860
3240
2430
1944
1389
1620
1080
1215
972
884
810
4000
3000
POWER DISSIPATION RATE
vs FREE-AIR TEMPERATURE
TLC5944RHB
TLC5944PWP
PowerPAD Soldered
2000
TLC5944PWP
PowerPAD Not Soldered
1000
100
0
10
20
30
40
50
60
Output Current (mA)
Figure 17.
OUTPUT CURRENT vs OUTPUT VOLTAGE⁽¹⁾
70
T_A
=
+25 C
°
60 ^{DC = 3Fh}
I_O = 60 mA
I_O = 50 mA
50
I_O = 40 mA
40
I_O = 30 mA
30
I_O = 20 mA
20
I_O = 2 mA
I_O = 5 mA
I_O = 10 mA
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
Output Voltage (V)
(1) When the output voltage is less than the maximum voltage of the
LED open detection threshold (V_LOD = 0.4 V_MAX) while the LED is on,
the LED is forced off by the auto output off function.
Figure 19.
ΔI_OLC vs AMBIENT TEMPERATURE
4
I_O = 60 mA
3
2
1
0
1
-
2
-
3
-
4
-
40 20
-
-
V_CC = 3.3 V
V_CC = 5 V
0
20 40 60
Ambient Temperature ( C)
°
Figure 21.
80 100
0
40
20
0
-
-
20
40
60
80 100
Free-Air Temperature ( C)
°
Figure 18.
OUTPUT CURRENT vs OUTPUT VOLTAGE
65
I_O = 60 mA
64
63
62
61
60
59
58
57
56
55
0
T_A
=
40 C
-°
T_A
=
+25 C
°
T_A
=
+85 C
°
0.5
1.0
1.5
2.0
2.5
3.0
Output Voltage (V)
Figure 20.
ΔI_OLC vs OUTPUT CURRENT
4
T_A
=
+25 C
°
3
2
1
0
1
-
2
-
3
-
4
-
0
V_CC = 3.3 V
V_CC = 5 V
10
20
30
40
50
60
Output Current (mA)
Figure 22.
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