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SCT2110 Datasheet Preview

SCT2110 Datasheet

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

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Technology
SCT2110 V03_01; Mar/08
8-bit Serial-In/Parallel-Out Constant-Current LED Driver
Product Description
The SCT2110 serial-interfaced LED driver sinks 8 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 160mA. The
SCT2110 guarantees each output can endure maximum 17V DC voltage stress. The
built-in shift registers and data latches making the SCT2110 effective solution in
driving LED display. The output enable function gates all 8 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 SCT2110 will satisfy system which
needs high volume data transmission to control the LED display.
Features
8 constant-current outputs rate at 17V
Constant current range: 5 – 160mA
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 = 100ns
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: SOP16 and SSOP16
Applications: LED Displays, Variable Message Signs, LED Traffic Signs
Pin Configurations
GND
SDI
CLK
LA/
OUT0
OUT1
OUT2
OUT3
1 16
2 15
3 SCT2110 14
4
5
CSOG
CSWG
13
12
6 CSSG 11
7 10
89
VDD
REXT
SDO
OE/
OUT7
OUT6
OUT5
OUT4
Ordering Information
Part Number
SCT2110CSOG
SCT2110CSWG
SCT2110CSSG
Package
Pb free SOP16 (150 mil)
Pb free SOP16 (300 mil)
Pb free SSOP16
StarChips Technology, Inc.
4F, No.5, Technology Rd., Science-Based Industrial Park, Hsin-Chu,Taiwan, R.O.C.
Tel: +886-3-577-5767 # 555 Fax+886-3-577-6575 service@starchips.com.tw




StarChips

SCT2110 Datasheet Preview

SCT2110 Datasheet

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

No Preview Available !

8-bit Serial-In/Parallel-Out Constant-Current LED Driver
Terminal Description
SCT2110
Pin Name
1 GND Ground terminal.
Function
2 SDI Serial input of data shift register.
3 CLK Clock input of shift register, data is sampled at the rising edge of CLK.
4
LA/
Input terminal of data strobe. Data is latched when LA/ is low. And data
on shift register goes through when LA/ is high.
5 -12 OUT[0:7] Open-drain, constant-current outputs.
13 OE/ Output enable signal. Output is enabled when OE/ is forced to low.
14 SDO Output terminal of serial-data output to the SDI of next SCT2110.
15 REXT Used to connect an external resistor for setting up all output current.
16 VDD Supply voltage terminal.
Block Diagram
OUT0 OUT1
OUT6 OUT7
REXT
Current
Regulator
Output Driver
OE/
LA/
CLK
Q
ST D
Q
ST D
SDI
DQ
C
DQ
C
Q
ST D
Q
ST D
DQ
C
DQ
C
SDO
Truth Table
CLK LA/ OE/
SDI
OUT0 ~ OUT7
H L Dn
Dn Dn-1 ---- Dn-6 Dn-7
L L Dn+1
No change
H
L
Dn+2
Dn+2 Dn+1 ---- Dn-4 Dn-5
X
L
Dn+3
Dn+2 Dn+1 ---- Dn-4 Dn-5
X H Dn+3
Off
SDO
Dn-7
Dn-6
Dn-5
Dn-5
Dn-5
Page 2 of 13


Part Number SCT2110
Description 8-bit Serial-In/Parallel In-Out Constant-Current LED Driver
Maker StarChips
Total Page 13 Pages
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