TLC5946_16 Datasheet, PDF (12/41 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction

TLC5946
SLVS824B – MARCH 2008 – REVISED JUNE 2008 .......................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS
At V_CC = 3.3 V and T_A = +25°C, unless otherwise noted.
REFERENCE RESISTOR vs
OUTPUT CURRENT
100k
12750
10k
1k
0
5100
3400
2550
2040
1700
1457
1275
10
20
30
40
50
Output Current (mA)
Figure 14.
45
40
35
30
25
20
15
10
5
0
0
OUTPUT CURRENT vs
OUTPUT VOLTAGE
I_O = 40 mA
T_A
=
+25 C
°
DCn = 3Fh
I_O = 30 mA
I_O = 20 mA
I_O = 10 mA
I_O = 5 mA
0.5
1.0
1.5
2.0
2.5
3.0
Output Voltage, V_O (V)
Figure 16.
CONSTANT CURRENT ERROR vs
AMBIENT TEMPERATURE
4
I_O = 40 mA
3
DCn = 3Fh
2
1
0
1
-
2
-
V_CC = 3.3 V
3
-
V_CC = 5.0 V
4
-
40
20
0
-
-
20 40 60 80 100
Ambient
Temperature,
T_A
( C)
°
Figure 18.
4000
3000
POWER DISSIPATION RATE
vs FREE-AIR TEMPERATURE
TLC5946RHB
TLC5946PWP
PowerPAD Soldered
2000
1000
TLC5946PW
TLC5946PWP
PowerPAD Not Soldered
0
40
20
-
-
0
20
40
60
Free-Air Temperature ( C)
°
Figure 15.
80 100
45
44
43
42
41
40
39
38
37
36
35
0
OUTPUT CURRENT vs
OUTPUT VOLTAGE
T_A
=
40 C
-°
T_A
=
+25 C
°
T_A
=
+85 C
°
0.5
1.0
1.5
2.0
Output Voltage, V_O (V)
Figure 17.
I_O = 40 mA
DCn = 3Fh
2.5
3.0
CONSTANT CURRENT ERROR vs
OUTPUT CURRENT
4
T_A
=
+25 C
°
3
DCn = 3Fh
2
1
0
1
-
2
-
3
-
4
-
0
V_CC = 3.3 V
V_CC = 5.0 V
10
20
30
40
Output Current (mA)
Figure 19.
12
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