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SCT2024 Datasheet Preview

SCT2024 Datasheet

16-bit Serial-In/Parallel-Out Constant-Current LED Driver

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StarChips
Technology
SCT2024 V01_03; May/11
16-bit Serial-In/Parallel-Out Constant-Current LED Driver
Product Description
The SCT2024 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 45mA. The SCT2024 guarantees each output can endure
maximum 17V DC voltage stress. The built in shift registers and data latches making the SCT2024
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 SCT2024 will satisfy system which needs high volume data transmission to
control the LED display. Furthermore, the SCT2024 provides excellent temperature regulation thus it
can be applied to varied of operating temperature.
Features
16 robust constant current sinker with LED power supply voltage up to 17V
Constant output current : 5 – 30/45mA@3.3/5V
Wide power supply voltages: 3.3V to 5V
Excellent regulation to load, supply voltage and temperature
Temperature regulation: ±0.005%/°C,
Load regulation: ±0.1%/V
Line regulation: ±0.5%/V
High current matching accuracy: ±1% between outputs, ±2% between ICs
Fine grayscale response with 180ns PWM pulse width
Dropout voltage 0.5V@20mA, VDD=5V
CMOS Schmitt trigger inputs with clock rate up to 25MHz @ cascade connection
The constant current value of 16 outputs is set by a single external resistor
Interlaced 30ns delay of output, preventing instant current surge and output bouncing overstress
Built in power on reset(POR) circuit forces all the outputs off while power on
Package: SSOP24, SSOP24 1, SOP24 and TQFN24
Applications: LED Displays, Variable Message Signs, Illumination, LED Traffic Signs
Page 1 of 21




StarChips

SCT2024 Datasheet Preview

SCT2024 Datasheet

16-bit Serial-In/Parallel-Out Constant-Current LED Driver

No Preview Available !

16-bit Serial-In/Parallel-Out Constant-Current LED Driver
Pin Configurations
SCT2024
GND 1
24 VDD
SDI 2
23 REXT
CLK 3
22 SDO
LA/ 4
21 OE/
OUT0 5 SCT2024 20 OUT15
OUT1 6
OUT2 7
CSSG
CSTG
CSOG
19 OUT14
18 OUT13
OUT3 8
17 OUT12
OUT4 9
16 OUT11
OUT5 10
15 OUT10
OUT6 11
14 OUT9
OUT7 12
A
13 OUT8
OUT14 1
24 OUT13
OUT15 2
23 OUT12
OE/ 3
22 OUT11
SDO 4
21 OUT10
REXT 5
20 OUT9
VDD 6 SCT2024 19 OUT8
GND 7 CSAG 18 OUT7
SDI 8
17 OUT6
CLK 9
16 OUT5
LA/ 10
15 OUT4
OUT0 11
14 OUT3
OUT1 12
B 13 OUT2
LA/
OUT0
OUT1
OUT2
OUT3
OUT4
1
2
3
4
5
6
SCT2024
CQNG
TP(GND)
C
18 OE/
17 OUT15
16 OUT14
15 OUT13
14 OUT12
13 OUT11
LA/
OUT0
OUT1
OUT2
OUT3
OUT4
1
2
3
4
5
6
SCT2024
AQNG
TP(GND)
D
18 OUT15
17 OUT14
16 OUT13
15 OUT12
14 OUT11
13 OUT10
Terminal Description
Pin Name
A
Pin No.
BC
I/O
D
Function
GND
SDI
CLK
1
7
22 10
(TP) (TP)
Ground terminal(thermal pad included)
2 8 23 23 I Serial input of data shift register.
3
9 24 24
I
Clock input of shift register, data is sampled at the
rising edge of CLK.
Input terminal of data strobe. Data is latched when
LA/ 4 10 1 1 I LA/ is low. And data on shift register goes through
when LA/ is high.
OUT[0:15]
5 20
11 2
2 17
29
11 18
O
Open drain, constant current outputs.
OE/
21 3
18 20
I
Output enable signal. Output is enabled when OE/ is
forced to low.
SDO
22
4
19
19
O
Output terminal of serial data output to the SDI of
next SCT2024.
REXT
VDD
23
5
20
21
I/O
Used to connect an external resistor for setting up all
output current
24 6 21 22
Supply voltage terminal
Page 2 of 21


Part Number SCT2024
Description 16-bit Serial-In/Parallel-Out Constant-Current LED Driver
Maker StarChips
Total Page 21 Pages
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