TLC5973D Datasheet, PDF (5/27 Pages) Texas Instruments – 3-Channel, 12-Bit, PWM Constant-Current LED Driver

TLC5973
www.ti.com
SBVS225A – MARCH 2013 – REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
At T_A = –40°C to +85°C, V_CC = 3 V to 6.0 V, and C_VCC = 0.1 µF. Typical values at T_A = +25°C and V_CC = 5.0 V, unless
otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
V_OL
V_IREF
V_R
I_CC0
High-level output voltage (SDO)
Low-level output voltage (SDO)
Reference voltage output
Shunt regulator output voltage (V_CC)
I_CC1
Supply current (V_CC)
I_CC2
I_CC3
I_OLC
I_OLKG
ΔI_OLC0
Constant output current
(OUT0 to OUT2)
Output leakage current
(OUT0 to OUT2)
Constant-current error
(channel-to-channel) ⁽¹⁾
I_OH = –2 mA
I_OL = 2 mA
R_IREF = 1.5 kΩ
I_CC = 1 mA, SDI = low
V_CC = 3.0 V to 5.5 V , SDI = low, all grayscale (GSn) =
FFFh, V_OUTn = 1 V, SDO = 15 pF, R_IREF = 27 kΩ
(I_OUTn = 2-mA target)
V_CC = 3.0 V to 5.5 V, SDI = low, all grayscale (GSn) =
FFFh, V_OUTn = 1 V, SDO = 15 pF, R_IREF = 3 kΩ
(I_OUTn = 17-mA target)
V_CC = 3.0 V to 5.5 V, SDI = 5 MHz, all grayscale
(GSn) = FFFh, V_OUTn = 1 V, SDO = 15 pF,
R_IREF = 3 kΩ (I_OUTn = 17-mA target)
V_CC = 3.0 V to 5.5 V, SDI = 5 MHz, all grayscale
(GSn) = FFFh, V_OUTn = 1 V, SDO = 15 pF,
R_IREF = 1.5 kΩ (I_OUTn = 34-mA target)
All OUTn = on, V_OUTn = 1 V, V_OUTfix = 1 V,
R_IREF = 1.5 kΩ
GSn = 000h, V_OUTn = 21
V
T_J = –40°C to +85°C
T_J = +85°C to +125°C
All OUTn = on, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
V_CC – 0.4
0
1.18
31
1.20
5.9
3
4
5
5.5
34
±0.5%
V_CC
V
0.4
V
1.23
V
V
6 mA
7 mA
8 mA
10 mA
37 mA
0.1 μA
0.2 μA
±3%
ΔI_OLC1
Constant-current error
(device-to-device) ⁽²⁾
All OUTn = on, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
±0.5%
±6%
ΔI_OLC2
Line regulation of constant-current
output ⁽³⁾
All OUTn = on, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
±0.5
±1 %/V
ΔI_OLC3
Load regulation of constant-current
output ⁽⁴⁾
All OUTn = on, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
±0.5
±1 %/V
R_PD
Internal pull-down resistance (SDI)
At SDI
1
MΩ
(1) The deviation of each output (OUT0 to OUT2) from the constant-current average. Deviation is calculated by the formula:
I_OUTn
-1
D (%) =
I_OUT0 + I_OUT1 + I_OUT2
´ 100
3
where n = 0 to 2.
(2) Deviation of the constant-current average in each color group from the ideal constant-current value. Deviation is calculated by the
formula:
D (%) =
I_OUT0 + I_OUT1 + I_OUT2
- Ideal Output Current
3
´ 100
Ideal Output Current
Ideal current is calculated by the formula:
1.20
I_OUTn(IDEAL) (mA) = 43.4 ´ _{RIREF (W)}
where n = 0 to 2.
(3) Line regulation is calculated by the formula:
D (%/V) =
(I_OUTn at V_CC = 5.5 V) - (I_OUTn at V_CC = 3.0 V)
I_OUTn at V_CC = 3.0 V
100
´
5.5 V - 3.0 V
where n = 0 to 2.
(4) Load regulation is calculated by the equation:
D (%/V) =
(I_OUTn at V_OUTn = 3.0 V) - (I_OUTn at V_OUTn = 1.0 V)
I_OUTn at V_OUTn = 1.0 V
100
´
3.0 V - 1.0 V
where n = 0 to 2.
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