TLC5948A Datasheet, PDF (15/50 Pages) Texas Instruments – 16-Channel, 16-Bit, ES-PWM, Full Self-Diagnosis LED Driver

TLC5948A
www.ti.com
SBVS192 – MARCH 2012
100k
10k
1k
TYPICAL CHARACTERISTICS
At T_A = +25°C, unless otherwise noted.
REFERENCE RESISTOR
vs OUTPUT CURRENT
25380
10152
OUTPUT CURRENT vs OUTPUT VOLTAGE (+3.3 V)
70
V_CC = 5 V
60 ^{DC and BC = 7Fh}
V_OUTn = 0.8 V
50 ^TA ^{= +25°C}
I_OLCMax = 45 mA
5076
3384
2538
1692
2030
1450
1269 _{1128 923}
1015 ₈₄₆
40
I_OLCMax = 30 mA
30
I_OLCMax = 20 mA
20
I_OLCMax = 2 mA I_OLCMax = 5 mA I_OLCMax = 10 mA
10
100
0
10
20
30
40
50
60
I_OLC, Output Current (V)
G001
Figure 12.
0
0
0.5
1
1.5
2
2.5
3
Output Voltage (V)
G011
Figure 13.
OUTPUT CURRENT vs OUTPUT VOLTAGE (+5 V)
70
V_CC = 5 V, DC and BC = 7Fh, V_OUTn = 0.8 V, T_A = +25°C
60
I_OLCMax = 60 mA
I_OLCMax = 50 mA
50
40
I_OLCMax = 40 mA
I_OLCMax = 30 mA
30
I_OLCMax = 20 mA
20
I_OLCMax = 2 mA I_OLCMax = 5 mA I_OLCMax = 10 mA
10
0
0
0.5
1
1.5
2
2.5
3
Output Voltage (V)
G012
Figure 14.
OUTPUT CURRENT vs OUTPUT VOLTAGE (+3.3 V)
49
V_CC = 3.3 V
48 DC and BC = 7Fh
V_OUTn = 0.8 V
47 _{RIREF = 1.13 kW}
46
45
44
43
T_A = -40°C
42
T_A = +25°C
T_A = +85°C
41
0
0.5
1
1.5
2
2.5
3
Output Voltage (V)
G013
Figure 15.
OUTPUT CURRENT vs
OUTPUT VOLTAGE (+5 V)
49
V_CC = 5 V
48 _{BC and DC = 7Fh}
47
R_IREF = 1.13 kW
V_OUTN = 0.8 V
46
45
44
43
T_A = -40°C
42
T_A = +25°C
T_A = +85°C
41
0
0.5
1
1.5
2
2.5
3
Output Voltage (V)
G002
Figure 16.
CONSTANT-CURRENT ERROR vs OUTPUT CURRENT
3
T_A = +25°C
2
BC and DC = 7Fh
V_LED = 0.8 V
1
0
-1
-2
-3
0
V_CC = 3.3 V
V_CC = 5 V
10
20
30
40
50
60
Output Current (mA)
G003
Figure 17.
Copyright © 2012, Texas Instruments Incorporated
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