TLC5952 Datasheet, PDF (15/33 Pages) Texas Instruments – 24-Channel, Constant-Current LED Driver with Global Brightness Control and LED Open-Short Detection

TLC5952
www.ti.com........................................................................................................................................................................................................ SBVS129 – MAY 2009
TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and V_CC = 3.3 V, unless otherwise noted.
CONSTANT-CURRENT ERROR vs OUTPUT CURRENT
(Channel-to-Channel in GREEN Color Group)
4
T_A = +25°C
3 BCG = 7Fh
2
1
0
-1
-2
-3
-4
0
V_CC = 3.3 V
V_CC = 5 V
5
10
15
20
25
30
35
Output Current (mA)
Figure 22.
CONSTANT-CURRENT ERROR
vs AMBIENT TEMPERATURE
(Channel-to-Channel in RED Color Group)
4
I_OLCMax = 35 mA
3 BCR = 7Fh
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 24.
80 100
CONSTANT-CURRENT ERROR
vs AMBIENT TEMPERATURE
(Channel-to-Channel in BLUE Color Group)
4
I_OLCMax = 26.2 mA
3 BCB = 7Fh
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 26.
80 100
CONSTANT-CURRENT ERROR vs OUTPUT CURRENT
(Channel-to-Channel in BLUE Color Group)
4
T_A = +25°C
3 BCB = 7Fh
2
1
0
-1
-2
-3
-4
0
V_CC = 3.3 V
V_CC = 5 V
5
10
15
20
25
30
Output Current (mA)
Figure 23.
CONSTANT-CURRENT ERROR
vs AMBIENT TEMPERATURE
(Channel-to-Channel in GREEN Color Group)
4
I_OLCMax = 35 mA
3 BCG = 7Fh
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 25.
80 100
GLOBAL BRIGHTNESS CONTROL LINEARITY
(RED and GREEN Color Group)
40
T_A = +25°C
35
V_CC = 3.3 V
30
V_CC = 5 V
I_O = 20 mA
25
(R = 2.4 kW)
I_O = 35 mA
(R = 1.37 kW)
20
I_O = 10 mA
15
(R = 4.8 kW)
10
5
I_O = 2 mA, (R = 24 kW)
0
0 16 32 48 64 80 96 112 128
Brightness Control Data (dec)
Figure 27.
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