TLC5928_16 Datasheet, PDF (4/32 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with LED Open Detection

TLC5928
SBVS120E – JULY 2008 – REVISED JANUARY 2011
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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.
TLC5928
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_OH = –1 mA at SOUT
I_OL = 1 mA at SOUT
V_IN = V_CC or GND at SIN, SCLK, LAT, and BLANK
SIN/SCLK/LAT = low, BLANK = high, V_OUTn = 1 V,
R_IREF = 27 kΩ
SIN/SCLK/LAT = low, BLANK = high, V_OUTn = 1 V,
R_IREF = 3 kΩ
SIN/SCLK/LAT/BLANK = low, V_OUTn = 1 V,
R_IREF = 3 kΩ
SIN/SCLK/LAT/BLANK = low, V_OUTn = 1 V,
R_IREF = 1.5 kΩ
All OUTn = ON, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
(see Figure 6), at OUT0 to OUT15
V_CC – 0.4
0
–1
31
V_CC
V
0.4
V
1
mA
1
2
mA
4.5
8
mA
7
18
mA
16
40
mA
34
37
mA
I_OLKG
Output leakage current
All OUTn for constant-current driver, all outputs off
BLANK = high, V_OUTn = V_OUTfix = 17 V, R_IREF = 1.5 kΩ
(see Figure 6), at OUT0 to OUT15
0.1
mA
ΔI_OLC
Constant-current error
(channel-to-channel) ⁽¹⁾
All OUTn = ON, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
at OUT0 to OUT15
±1
±3
%
ΔI_OLC1
Constant-current error
(device-to-device) ⁽²⁾
All OUTn = ON, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
at OUT0 to OUT15
±1
±6
%
ΔI_OLC2
Line regulation⁽³⁾
All OUTn = ON, V_OUTn = V_OUTfix = 1 V, R_IREF = 1.5 kΩ
at OUT0 to OUT15
±0.5
±1
%/V
ΔI_OLC3
T_(PTW)
V_LOD
V_IREF
Load regulation⁽⁴⁾
Pre-thermal warning threshold
LED open detection threshold
Reference voltage output
All OUTn = ON, V_OUTn = 1 V to 3V, V_OUTfix = 1 V,
R_IREF = 1.5 kΩ, at OUT0 to OUT15
Junction temperature⁽⁵⁾
All OUTn = ON
R_IREF = 1.5 kΩ
+125
0.25
1.16
±1
+138
0.30
1.20
±3
%/V
+150
°C
0.35
V
1.24
V
(1) The deviation of each output from the average of OUT0–OUT15 constant-current. Deviation is calculated by the formula:
(%) =
D
I_OUTn
1 100
-´
(I_OUT0 + I_OUT1 + ... + I_OUT14 + I_OUT15)
16
.
(2) The deviation of the OUT0–OUT15 constant-current average from the ideal constant-current value.
Deviation is calculated by the following formula:
D (%) =
(I_OUT0 + I_OUT1 + ... I_OUT14 + I_OUT15)
- (Ideal Output Current)
16
Ideal Output Current
´ 100
Ideal current is calculated by the formula:
I_OUT(IDEAL) = 42 ´
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)
(%/V) =
D
(I_OUTn at V_CC = 3.0 V)
100
´
5.5 V 3 V
-
(4) Load regulation is calculated by the equation:
(%/V) =
D
(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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