TLC5952 Datasheet, PDF (16/33 Pages) Texas Instruments – 24-Channel, Constant-Current LED Driver with Global Brightness Control and LED Open-Short Detection

TLC5952
SBVS129 – MAY 2009........................................................................................................................................................................................................ www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and V_CC = 3.3 V, unless otherwise noted.
GLOBAL BRIGHTNESS CONTROL LINEARITY
(BLUE Color Group)
40
T_A = +25°C
35
V_CC = 3.3 V
30
V_CC = 5 V
25
I_O = 26.6 mA
(R = 1.371 kW)
I_O = 15 mA
(R = 2.4 kW)
20
I_O = 7.5 mA
(R = 4.8 kW)
15
10
I_O = 1.5 mA
(R = 24 kW)
5
0
0 16 32 48 64 80 96 112 128
Brightness Control Data (dec)
Figure 28.
SUPPLY CURRENT vs OUTPUT CURRENT
(RED and GREEN Color Group)
30
T_A = +25°C
25
SIN = 17.5 MHz
SCLK = 35 MHz
BCR/G/B = 7Fh
20 All Group Output = On
15
10
5
V_CC = 3.3 V
V_CC = 5 V
0
0
5
10
15
20
25
30
35
OUTRn/Gn Output Current (mA)
Figure 29.
SUPPLY CURRENT vs OUTPUT CURRENT
(BLUE Color Group)
30
T_A = +25°C
25
SIN = 17.5 MHz
SCLK = 35 MHz
BCR/G/B = 7Fh
20 All Group Output = On
15
10
5
V_CC = 3.3 V
V_CC = 5 V
0
0
5
10
15
20
25
30
OUTBn Output Current (mA)
Figure 30.
SUPPLY CURRENT vs AMBIENT TEMPERATURE
35
R = 1.37 kW, I_{O (Rn/Gn)} = 35 mA
30 ^IO (Bn) ^{= 26.2 mA}
V_CC = 3.3 V
V_CC = 5 V
25
20
R = 2.4 kW, I_{O (Rn/Gn)} = 20 mA, I_{O (Bn)} = 15 mA
15
10 ^{SIN = 17.5 MHz, SCLK = 35 MHz,}
BCR/G/B = 7Fh, All Group Output = On
5
R = 24 kW, I_{O (Rn/Gn)} = 2 mA, I_{O (Bn)} = 1.5 mA
0
-40 -20
0
20
40
60
80 100
Ambient Temperature (°C)
Figure 31.
CONSTANT-CURRENT OUTPUT VOLTAGE WAVEFORM
CH1 (2 V/div)
CH1-BLANK
(15 ns)
CH2 (2 V/div)
CH2-OUTR0
(BLANK = 15 ns)
CH3 (2 V/div)
I_{OLCMax (R)} = 32 mA
I_{OLCMAX (B)} = 24 mA
R_IREF = 1.5 kW, T_A = +25°C
R_L = 120 W, C_L = 15 pF
V_CC = 3.3 V, V_LED = 5 V
CH3-OUTB0
(BLANK = 15 ns)
Time (12.5 ns/div)
Figure 32.
16
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