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TLC5928_1 Datasheet, PDF (4/28 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with LED Open Detection | |||
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TLC5928
SBVS120B â JULY 2008 â REVISED OCTOBER 2008...................................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS
At VCC = 3.0 V to 5.5 V and TA = â40°C to +85°C. Typical values at VCC = 3.3 V and TA = +25°C, unless otherwise noted.
TLC5928
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
VOH
High-level output voltage
VOL
Low-level output voltage
IIN
Input current
ICC1
ICC2
Supply current (VCC)
ICC3
ICC4
IOLC
Constant output current
IOH = â1 mA at SOUT
IOL = 1 mA at SOUT
VIN = VCC or GND at SIN, SCLK, LAT, and BLANK
SIN/SCLK/LAT = low, BLANK = high, VOUTn = 1 V,
RIREF = 27 kâ¦
SIN/SCLK/LAT = low, BLANK = high, VOUTn = 1 V,
RIREF = 3 kâ¦
SIN/SCLK/LAT/BLANK = low, VOUTn = 1 V,
RIREF = 3 kâ¦
SIN/SCLK/LAT/BLANK = low, VOUTn = 1 V,
RIREF = 1.5 kâ¦
All OUTn = ON, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kâ¦
(see Figure 6), at OUT0 to OUT15
VCC â 0.4
0
â1
31
VCC
V
0.4
V
1
µA
1
2
mA
4.5
8
mA
7
18
mA
16
40
mA
34
37
mA
IOLKG
Output leakage current
All OUTn for constant current driver, all outputs off
BLANK = high, VOUTn = VOUTfix = 17 V, RIREF = 1.5 kâ¦
(see Figure 6), at OUT0 to OUT15
0.1
µA
ÎIOLC
Constant current error
(channel-to-channel) (1)
All OUTn = ON, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kâ¦
at OUT0 to OUT15
±1
±3
%
ÎIOLC1
Constant current error
(device-to-device) (2)
All OUTn = ON, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kâ¦
at OUT0 to OUT15
±1
±6
%
ÎIOLC2
Line regulation(3)
All OUTn = ON, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kâ¦
at OUT0 to OUT15
±0.5
±1
%/V
ÎIOLC3
T(PTW)
VLOD
VIREF
Load regulation(4)
Pre-thermal warning threshold
LED open detection threshold
Reference voltage output
All OUTn = ON, VOUTn = 1 V to 3V, VOUTfix = 1 V,
RIREF = 1.5 kâ¦, at OUT0 to OUT15
Junction temperature(5)
All OUTn = ON
RIREF = 1.5 kâ¦
+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 OUT0âOUT15 constant current. Deviation is calculated by the formula:
(%) =
D
IOUTn
1 100
-´
(IOUT0 + IOUT1 + ... + IOUT14 + IOUT15)
16
.
(2) The deviation of the OUT0âOUT15 constant current average from the ideal constant current value.
Deviation is calculated by the following formula:
(%) =
D
(IOUT0 + IOUT1 + ... IOUT14 + IOUT15)
(Ideal Output Current)
-
16
Ideal Output Current
100
´
Ideal current is calculated by the formula:
IOUT(IDEAL) = 42 ´
1.20
RIREF
(3) Line regulation is calculated by this equation:
(IOUTn at VCC = 5.5 V) - (IOUTn at VCC = 3.0 V)
(%/V) =
D
(IOUTn at VCC = 3.0 V)
100
´
5.5 V 3 V
-
(4) Load regulation is calculated by the equation:
(%/V) =
D
(IOUTn at VOUTn = 3 V) - (IOUTn at VOUTn = 1 V)
(IOUTn at VOUTn = 1 V)
100
´
3V 1V
-
(5) Not tested. Specified by design.
4
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