TLC5951 Datasheet, PDF (20/46 Pages) Texas Instruments – 24-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control

TLC5951
SBVS127B – MARCH 2009 – REVISED DECEMBER 2009
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TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and V_CC = 3.3 V, unless otherwise noted.
GLOBAL BRIGHTNESS CONTROL LINEARITY
(I_OLCMax with Upper Range)
45
High Adjustment Range
40 T_A = +25°C
35 ^{DCXn = 7Fh}
V_CC = 3.3 V
30
25
I_O = 40 mA
20
15
I_O = 20 mA
10
5
I_O = 2 mA
0
0 32 64 96 128 160 192 224 256
Brightness Correction Data (dec)
Figure 38.
GLOBAL BRIGHTNESS CONTROL LINEARITY
(Ambient Temperature with Upper Range)
45
High Adjustment Range
40 I_OLCMax = 40 mA
35 ^{DCXn = 7Fh}
V_CC = 3.3 V
30
25
20
15
10
5
0
0
T_A = -40°C
T_A = +25°C
T_A = +85°C
32 64 96 128 160 192 224 256
Brightness Correction Data (dec)
Figure 39.
CONSTANT-CURRENT OUTPUT
VOLTAGE WAVEFORM
CH1 (2 V/div)
CH2 (2 V/div)
CH3 (2 V/div)
I_OLCMax = 40 mA, BCX = 7Fh
DCXn = 7Fh with High Adjustment Range
T_A = +25°C, GSCKR/G/B = 33 MHz
V_CC = 3.3 V, V_LED = 5 V, R_L = 100 W, C_L = 15 pF
Time (25 ns/div)
Figure 40.
20
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