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PDF SCT2026 Data sheet ( Hoja de datos )
| Número de pieza | SCT2026 | |
| Descripción | 16-bit Serial-In/Parallel-Out Constant-Current LED Driver | |
| Fabricantes | StarChips | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SCT2026 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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StarChips
Technology
SCT2026 V02_01; Jan/08
16-bit Serial-In/Parallel-Out Constant-Current LED Driver
Product Description
The SCT2026 serial-interfaced LED driver sinks 16 LED clusters with constant
current to keep the uniform intensity of LED displays. In applications, an external
resistor is used to set the full-scale constant output current from 5mA up to 90mA.
The SCT2026 guarantees each output can endure maximum 17V DC voltage stress.
The built-in shift registers and data latches making the SCT2026 effective solution in
driving LED display. The output enable function gates all 16 outputs on and off, and
is fast enough to be used as PWM input for LED intensity control. Since the serial
data input rate can be reached up to 25MHz, the SCT2026 will satisfy system which
needs high volume data transmission to control the LED display.
Features
16 constant-current outputs rate at 17V
Constant output current range: 5 – 90mA
Excellent current regulation to load, supply voltage and temperature
±3% Current matching between outputs
±6% Current matching between ICs
Fast output current control: Minimum PWM pulse width = 120ns
All output current are programmed together using a single external resistor
CMOS Schmitt triggered inputs
High serial data transfer rate: 25MHz
Operating supply voltage range of 4.5V to 5.5V
Built-in power on reset and thermal protection function
Package: SOP24, SSOP24 and SDIP24
Applications: LED Displays, Variable Message Signs, LED Traffic Signs
Pin Configurations
GND
SDI
CLK
LA/
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
1 24
2 23
3 22
4 21
5 SCT2026 20
6 CSOG 19
7 CSSG 18
8 CSTG 17
9 CSDG 16
10 15
11 14
12 13
VDD
REXT
SDO
OE/
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
OUT14
OUT15
OE/
SDO
REXT
VDD
GND
SDI
CLK
LA/
OUT0
OUT1
1 24
2 23
3 22
4 21
5 SCT2026 20
6 CSAG 19
7 18
8 17
9 16
10 15
11 14
12 13
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
1 page  
16-bit Serial-In/Parallel-Out Constant-Current LED Driver
SCT2026
Electrical Characteristics (VDD=5V, TA=25℃ unless otherwise noted)
Characteristic
Symbol
Condition
Min. Typ. Max. Unit
Input Voltage
SDO Output Voltage
Output Leakage Current
Output Current
Current Bit Skew(Note 1)
Current Chip Skew
IOUT vs. VDD Regulation
IOUT vs. VOUT Regulation
VIH - 0.7VDD - VDD V
VIL - 0 - 0.3VDD V
VOH VDD=5V, IOH = -1mA 4.6 - - V
VOL VDD=5V, IOL = +1mA - - 0.4 V
IOL VOUT = 17V - - 0.5 µA
IOUT VOUT=1V, REXT=900Ω - 21 - mA
dIOUT1 VOUT=1V, REXT=900Ω - ±1 ±3 %
dIOUT2 VOUT=1V, REXT=900Ω - ±3 ±6 %
%/dVDD
4.5V < VDD < 5.5V,
VOUT > 1V, REXT=900Ω
-
- ±2 %/V
%/dVOUT
1V < VOUT < 4V
IOUT=21mA, REXT=900Ω
-
- ±1 %/V
Pull-up Resistor
Rup OE/ - 650 - KΩ
Pull-down Resistor
Rdown
LA/
- 650 - KΩ
Thermal Shutdown
Supply
Current
OFF
TH
TL
- 170 -
Junction Temperature - 130 -
℃
℃
IDD(off)1
REXT =Open, VDD = 5V
OUT [0:15]=Off
-
7
9
IDD(off)2
REXT = 900Ω, VDD = 5V
OUT [0:15]=Off
-
9 11 mA
ON
IDD(on)
REXT = 900 Ω, VDD = 5V
OUT [0:15]=On
-
10 12
Note 1: Bit Skew=(IOUT-IAVG)/IAVG, where IAVG=(Imax + Imin)/2
Switching Characteristics (TA=25℃ unless otherwise noted)(Note 2)
Characteristic
Symbol Condition
Min. Typ. Max. Unit
Propagation
Delay Time
(“L” to “H”)
Propagation
Delay Time
(“H” to “L”)
Pulse Width
CLK - OUTn
LA/ - OUTn
OE/ - OUTn
CLK - SDO
CLK - OUTn
LA/ - OUTn
OE/ - OUTn
CLK - SDO
CLK
LA/
OE/
tPLH1
tPLH2
tPLH3
tPLH
tPHL1
tPHL2
tPHL3
tPHL
tW(CLK)
tW(L)
tW(OE)
VDD = 5V
VLED = 5V
VIH = VDD
VIL= GND
REXT = 900 Ω
RL = 180 Ω
CL = 10 pF
- 30
- 100
- 50
- 15
- 40
- 100
- 30
- 15
20 -
20 -
120
60
150
100
20
60
150
60
20
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Hold Time for LA/
tH(L)
5-
- ns
Setup Time for LA/
tS(L)
5-
- ns
Output Rise Time of IOUT tOR
- 20 30 ns
Output Fall Time of IOUT
tOF
- 20 30 ns
Slow CLK rise time
Slow CLK fall time
tR
tF
Cascade
- - 500 ns
- - 500 ns
Note 2:
All parameter tested at TA=25℃. Specifications over temperature are guaranteed by design.
Page 5 of 14
5 Page 
16-bit Serial-In/Parallel-Out Constant-Current LED Driver
Package Dimension
SOP24
SCT2026
SYMBOL
A
A1
b
b1
c
c1
D
E
e
H
h
L
Y
θ
DIMENSION (mm)
MIN
2.36
0.10
0.35
0.35
0.23
0.23
15.20
7.40
10.00
0.25
0.51
0°
NOM
2.54
0.20
0.406
0.254
15.29
7.50
1.27 BSC
10.31
0.66
0.76
MAX
2.64
0.30
0.48
0.46
0.31
0.29
15.60
7.60
10.65
0.75
1.02
0.075
8°
DIMENSION (mil)
MIN
NOM
MAX
93 100 104
4 8 12
14 16 19
14 18
9 10 12
9 11
598 602 614
291 295 299
50 BSC
394 406 419
10 26 30
20 30 40
3
0° 8°
Page 11 of 14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SCT2026.PDF ] | |
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