TLC5947 Datasheet, PDF (4/27 Pages) Texas Instruments – 24-Channel, 12-Bit PWM LED Driver with

TLC5947
SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
At V_CC = 3.0 V to 5.5 V and T_A = –40°C to +85°C. Typical values at V_CC = 3.3 V and T_A = +25°C, unless otherwise noted.
TLC5947
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
High-level output voltage
V_OL
Low-level output voltage
I_IN
Input current
I_CC1
I_CC2
Supply current (V_CC)
I_CC3
I_CC4
I_OLC
Constant output current
I_OLK
Output leakage current
I_OH = –3 mA at SOUT
I_OL = 3 mA at SOUT
V_IN = V_CC or GND at SIN, XLAT, and BLANK
SIN/SCLK/XLAT = low, BLANK = high, V_OUTn = 1 V,
R_IREF = 24 kΩ
SIN/SCLK/XLAT = low, BLANK = high, V_OUTn = 1 V,
R_IREF = 3.3 kΩ
SIN/SCLK/XLAT = low, BLANK = low, V_OUTn = 1 V,
R_IREF = 3.3 kΩ, GSn = FFFh
SIN/SCLK/XLAT = low, BLANK = low, V_OUTn = 1 V,
R_IREF = 1.6 kΩ, GSn = FFFh
All OUTn = ON, V_OUTn = 1 V, V_OUTfix = 1 V,
R_IREF = 1.6 kΩ
BLANK = high, V_OUTn = 30 V, R_IREF = 1.6 kΩ,
At OUT0 to OUT23
V_CC – 0.4
–1
27.7
0.5
1
15
30
30.75
V_CC
V
0.4
V
1
µA
3
mA
6
mA
45
mA
90
mA
33.8
mA
0.1
µA
ΔI_OLC
ΔI_OLC1
ΔI_OLC2
ΔI_OLC3
T_DOWN
T_HYS
V_IREF
Constant current error
(channel-to-channel) ⁽¹⁾
Constant current error
(device-to-device) ⁽²⁾
Line regulation⁽³⁾
Load regulation⁽⁴⁾
Thermal shutdown threshold
Thermal error hysteresis
Reference voltage output
All OUTn = ON, V_OUTn = 1 V, V_OUTfix = 1 V,
R_IREF = 1.6 kΩ, At OUT0 to OUT23
All OUTn = ON, V_OUTn = 1 V, V_OUTfix = 1 V,
R_IREF = 1.6 kΩ
All OUTn = ON, V_OUTn = 1 V, V_OUTfix = 1 V,
R_IREF = 1.6 kΩ, At OUT0 to OUT23
All OUTn = ON, V_OUTn = 1 V to 3 V, V_OUTfix = 1 V,
R_IREF = 1.6 kΩ, At OUT0 to OUT23
Junction temperature⁽⁵⁾
Junction temperature⁽⁵⁾
R_IREF = 1.6 kΩ
+150
+5
1.16
±2
±2
±1
±2
+162
+10
1.20
±4
%
±7
%
±3
%/V
±6
%/V
+175
°C
+20
°C
1.24
V
(1) The deviation of each output from the average of OUT0–OUT23 constant current. Deviation is calculated by the formula:
D (%) =
I_OUTn
- 1 ´ 100
(I_OUT0 + I_OUT1 + ... + I_OUT22 + I_OUT23)
24
.
(2) The deviation of the OUT0–OUT23 constant current average from the ideal constant current value.
Deviation is calculated by the following formula:
D (%) =
(I_OUT0 + I_OUT1 + ... I_OUT22 + I_OUT23) _{- (Ideal Output Current)}
24
Ideal Output Current
´ 100
Ideal current is calculated by the formula:
I_OUT(IDEAL) = 41 ´
1.20
R_IREF
(3) Line regulation is calculated by this equation:
(I_OUTn at V_CC = 5.5 V) - (I_OUTn at V_CC = 3.0 V)
D (%/V) =
(I_OUTn at V_CC = 3.0 V)
100
´
5.5 V - 3 V
(4) Load regulation is calculated by the equation:
D (%/V) =
(I_OUTn at V_OUTn = 3 V) - (I_OUTn at V_OUTn = 1 V)
(I_OUTn at V_OUTn = 1 V)
100
´
3V-1V
(5) Not tested. Specified by design.
4
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