TLC5971 Datasheet, PDF (15/37 Pages) Texas Instruments – 12-Channel 16-Bit, Enhanced Spectrum PWM, RGB LED Driver with 3.3-V Linear Regulator

TLC5971
www.ti.com
SBVS146 – AUGUST 2010
TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and VCC = 24 V, unless otherwise noted.
GLOBAL BRIGHTNESS CONTROL LINEARITY
SUPPLY CURRENT vs OUTPUT CURRENT
70
T_A = +25°C
60 VCC = 12 V
50
I_OLCMax = 60 mA
30
T_A = +25°C, VCC = 12 V
25
BCx = 7Fh, GSx = FFFFh
EXTGCK = 1, DSPRPT = 1
SDTI = 10 MHz, SCKI = 20 MHz
20
40
I_OLCMax = 2 mA
30
I_OLCMax = 30 mA
15
10
20
10
I_OLCMax = 10 mA
5
0
0 16 32 48 64 80 96 112 128
Brightness Control Data (dec)
Figure 17.
0
0
10
20
30
40
50
60
Output Current (mA)
Figure 18.
SUPPLY CURRENT vs AMBIENT TEMPERATURE
30
25
20
15
10
I_OLCMax = 60 mA, VCC = 12 V
5 ^{BCx = 7Fh, GSx = FFFFh}
EXTGCK = 1, DSPRPT = 1
SDTI = 10 MHz, SCKI = 20 MHz
0
-40 -20
0
20
40
60
Ambient Temperature (°C)
Figure 19.
80 100
LINEAR REGULATOR OUTPUT VOLTAGE vs
LINEAR REGULATOR OUTPUT CURRENT
3.5
3.45
3.4
3.35
3.3
3.25
3.2 ^TA ^{= +25°C, I}OLCMax ^{= 60 mA,}
VCC = 12 V
3.15 BCx = 7Fh, GSx = FFFFh
EXTGCK = 0, DSPRPT = 1
3.1
0
5
10
15
20
25
Linear Regulator Output Current, I_REG (mA)
Figure 20.
LINEAR REGULATOR OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
3.5
3.45
3.4
T_A = +25°C, I_OLCMax = 60 mA,
BCx = 7Fh, GSx = FFFFh
EXTGCK = 0, DSPRPT = 1
3.35
3.3
3.25
3.2
I_REG = 0 mA
I_REG = -25 mA
3.15
3.1
6
8
10
12
14
16
18
Supply Voltage, V_CC (V)
Figure 21.
CH1 (2 V/div)
CH2 (2 V/div)
CH3 (2 V/div)
CH4 (5 V/div)
CONSTANT-CURRENT OUTPUT
VOLTAGE WAVEFORM
CH1
(OUTR0)
CH2
(OUTG0)
T_A = +25°C, VCC = 12 V
I_OLCMax = 60 mA, BCx = 7Fh,
GSXn = 0001h, VLED = 5 V,
R_L = 68 W, OUTTMG = 1
CH4
(SCKI)
CH3
(OUTB0)
Time (20 ns/div)
Figure 22.
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