TLC59283_15 Datasheet, PDF (4/29 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with Pre-Charge FET

TLC59283
SBVS199B – JUNE 2012 – REVISED OCTOBER 2012
www.ti.com
ELECTRICAL CHARACTERISTICS
All minimum and maximum specifications are at T_A = –40°C to +85°C and V_CC = 3 V to 5.5 V, unless otherwise noted.
Typical specifications are at T_A = +25°C and V_CC = 3.3 V.
TLC59283
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
High
Output voltage
V_OL
Low
I_OH = –2 mA at SOUT
I_OL = 2 mA at SOUT
V_CC – 0.4
V_CC
V
0.4
V
V_PCHG Pre-charged voltage
I_O = –10 µA
V_CC – 2.0 V_CC – 1.4 V_CC – 0.8
V
V_IREF
Reference voltage output
R_IREF = 1.5 kΩ, T_A = +25°C
1.208
V
I_IN
Input current
V_IN = V_CC or GND at SIN and SCLK
–1
1
μA
I_CC0
SIN, SCLK, LAT = GND, BLANK = V_OUTn = V_CC, R_IREF = open
1
2 mA
I_CC1
I_CC2
Supply current (V_CC)
SIN, SCLK, LAT = GND, BLANK = V_OUTn = V_CC,
R_IREF = 3 kΩ (I_OUT = 17.6 mA target)
All OUTn = ON, SIN, SCLK, LAT, BLANK = GND,
V_OUTn = 0.8 V, R_IREF = 3 kΩ
3
4 mA
7
9 mA
I_CC3
All OUTn = ON, SIN, SCLK, LAT, BLANK = GND,
V_OUTn = 0.8 V, R_IREF = 1.5 kΩ (I_OUT = 35.3 mA target)
8
11 mA
I_OLC
Constant output current
All OUTn = ON, V_OUTn = V_OUTfix = 0.8 V, R_IREF = 1.5 kΩ,
T_A = +25°C (see Figure 8)
32.9
35.3
37.7 mA
I_OLKG0 Output leakage current
All OUTn = OFF, V_OUTn = V_OUTfix = 10 V,
BLANK = V_CC, R_IREF = 1.5 kΩ (see Figure 8)
T_J = +25°C
T_J = +85°C
T_J = +125°C
0.1
μA
0.2
μA
0.07
0.5
μA
ΔI_OLC0
ΔI_OLC1
Constant-
current error
Channel-to-
channel ⁽¹⁾
Device-to-
device ⁽²⁾
All OUTn = ON, V_OUTn = V_OUTfix = 0.8 V, R_IREF = 1.5 kΩ,
T_A = +25°C (see Figure 8)
All OUTn = ON, V_OUTn = V_OUTfix = 0.8 V, R_IREF = 1.5 kΩ,
T_A = +25°C (see Figure 8)
±1.4
±3
%
±2
±4
%
ΔI_OLC2
Line regulation⁽³⁾
All OUTn = ON, V_OUTn = V_OUTfix = 0.8 V, R_IREF = 1.5 kΩ,
V_CC = 3 V to 5.5 V
±0.05
±1 %/V
ΔI_OLC3
Load regulation⁽⁴⁾
All OUTn = ON, V_OUTn = 0.8 V to 3 V, V_OUTfix = 0.8 V,
R_IREF = 1.5 kΩ
±0.5
±1 %/V
R_PUP
R_PDWN
Resistor
Pull-up
Pull-down
BLANK
LAT
250
500
750
kΩ
250
500
750
kΩ
R_PCHG
Pre-charge FET on-resistance
VCC = 5.0 V, V_OUTn = 0 V, OUT0 to OUT15,
BLANK = V_CC, T_A = +25°C
3
6
kΩ
(1) The deviation of each output from the average of OUT0 to 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 to 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:
1.208 V
I_OUT(IDEAL) = 43.8 ´ _RIREF
(3) Line regulation is calculated by this equation:
D (%/V) =
(I_OUTn at V_CC = 5.5 V) - (I_OUTn at V_CC = 3 V)
(I_OUTn at V_CC = 3 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
4
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