TLC5944 Datasheet, PDF (14/34 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

TLC5944
SBVS112 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
At V_CC = 3.3 V and T_A = +25°C, unless otherwise noted.
ΔI_OLC vs OUTPUT CURRENT
4
V_CC = 3.3 V
3
T_A
=
+25 C
°
2
1
0
1
-
2
-
3
-
4
-
0
R_IREF Control
Dot Correction Control at R_IREF (60 mA)
10
20
30
40
50
60
Output Current (mA)
Figure 23.
DOT CORRECTION LINEARITY
(ABS Value)
70
I_O = 60 mA
60
50
40
30
20
10
0
0
T_A
=
40 C
-°
T_A
=
+25 C
°
T_A
=
+85 C
°
10
20
30
40
50
60
70
Dot Correction Data (dec)
Figure 25.
DOT CORRECTION LINEARITY
(ABS Value)
70
T_A
=
+25 C
°
60
50
I_O = 60 mA
40
30
I_O = 30 mA
20
10
0
0
I_O = 2 mA
10
20
30
40
50
60
70
Dot Correction Data (dec)
Figure 24.
CONSTANT CURRENT OUTPUT
VOLTAGE WAVEFORM
CH1 (2 V/div)
CH1-GSCLK
(33 MHz)
CH2 (2 V/div)
CH2-OUT0
(GSData = 0x001h)
CH3 (2 V/div)
I_OLCMax = 60 mA
DC
=
3Fh,
T_A
=
+25 C
°
R_L = 68 W, C_L = 15 pF
VLED = VUP = 5 V
CH3-OUT15
(GSData = 0x001h)
Time (25 ns/div)
Figure 26.
14
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