TLC5952 Datasheet, PDF (4/33 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
ELECTRICAL CHARACTERISTICS
At T_A = –40°C to +85°C, V_CC = 3 V to 5.5 V, and V_LED = 5 V, unless otherwise noted. Typical values are at T_A = +25°C and
V_CC = 3.3 V.
TLC5952
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
V_OL
I_IN
I_CC1
I_CC2
I_CC3
I_CC4
I_OLC
I_OLC1
I_OLKG
ΔI_OLC
High level output voltage
Low level output voltage
Input current
Supply current
Constant output current
Leakage output current
Constant-current error⁽¹⁾
(channel-to-channel in
same color group)
I_OH = –1 mA at SOUT
I_OL = 1 mA at SOUT
V_I = V_CC or GND at SIN, SCLK, LAT, and BLANK
SIN, SCLK, LAT = low, BLANK = high,
V_OUTRn/Gn/Bn = 1 V, BCR/G/B = 7Fh,
R_IREF = 24 kΩ (I_OUTRn/Gn = 2 mA target, I_OUTBn = 1.5 mA target)
SIN, SCLK, LAT = low, BLANK = high,
V_OUTRn/Gn/Bn = 1 V, BCR/G/B = 7Fh,
R_IREF = 2.4 kΩ (I_OUTRn/Gn = 20 mA target, I_OUTBn = 15 mA target)
SIN, SCLK, LAT = low, BLANK = low, all OUTRn/Gn/Bn = on,
V_OUTRn/Gn/Bn = 1 V, BCR/G/B = 7Fh,
R_IREF = 2.4 kΩ (I_OUTRn/Gn = 20 mA target, I_OUTBn = 15 mA target)
SIN, SCLK, LAT = low, BLANK = low, all OUTRn/Gn/Bn = on,
V_OUTRn/Gn/Bn = 1 V, BCR/G/B = 7Fh,
R_IREF = 1.5 kΩ (I_OUTRn/Gn = 32 mA target, I_OUTBn = 24 mA target)
At OUTR0-OUTR7 and OUTG0-OUTG7,
All OUTRn/Gn/Bn = on, BCR/G/B = 7Fh,
V_OUTRn/Gn/Bn = V_OUTfix = 1 V,
R_IREF = 1.5 kΩ (I_OUTRn/Gn = 32 mA target)
At OUTB0-OUTB7,
All OUTRn/Gn/Bn = on, BCR/G/B = 7Fh,
V_OUTRn/Gn/Bn = V_OUTfix = 1 V,
R_IREF = 1.5 kΩ (I_OUTBn = 24 mA target)
At OUTR0-OUTR7, OUTG0-OUTG7, and OUTB0-OUTB7,
BLANK = high, V_OUTRn/Gn/Bn = V_OUTfix = 15 V, R_IREF = 1.5 kΩ
At OUTR0-OUTR7, OUTG0-OUTG7, and OUTB0-OUTB7,
All OUTRn/Gn/Bn = on, BCR/G/B = 7Fh,
V_OUTRn/Gn/Bn = V_OUTfix = 1 V,
R_IREF = 1.5 kΩ (I_OUTRn/Gn = 32 mA target, I_OUTBn = 24 mA target),
at same color group output
V_CC – 0.4
–1
29
21.8
V_CC
V
0.4 V
1 µA
1
3 mA
8
14 mA
12
30 mA
20
50 mA
32
35 mA
24
26.2 mA
0.1 µA
±1
±3 %
ΔI_OLC1
Constant current error⁽²⁾
(device to device in
same color group)
At OUTR0-OUTR7, OUTG0-OUTG7, and OUTB0-OUTB7,
All OUTRn/Gn/Bn = on, BCR/G/B = 7Fh,
V_OUTRn/Gn/Bn = V_OUTfix = 1 V,
R_IREF = 1.5 kΩ (I_OUTRn/Gn = 32 mA target, I_OUTBn = 24 mA target),
at same color group output
±3
±6 %
(1) The deviation of each output in the same color group from the average of the same color group (OUTR0-OUTR7, OUTG0-OUTG7, or
OUTB0-OUTB7) constant current. The deviation is calculated by the formula (X = R, G, or B; n = 0-7):
D (%) =
I_OUTXn
- 1 ´ 100
(I_OUTX0 + I_OUTX1 + ... + I_OUTX6 + I_OUTX7)
8
(2) The deviation of the constant-current average of each color group from the ideal constant-current value. The deviation is calculated by
the formula (X = R, G, or B):
D (%) =
(I_OUTX0 + I_OUTX1 +¼+I_OUTX7) _{- (Ideal Output Current)}
8
Ideal Output Current
´ 100
Ideal current is calculated by the following equation for OUTR0-OUTR7 and OUTG0-OUTG7 (X = R, G, or B):
I_{OUTRn/Gn(IDEAL, mA)} = 40 ´
1.20
R_IREF (W)
Ideal current is calculated by the following equation for OUTR0-OUTR7 and OUTG0-OUTG7 (X = R, G, or B):
I_{OUTBn(IDEAL, mA)} = 30 ´
1.20
R_IREF (W)
4
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