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SCT2168 の電気的特性と機能

SCT2168のメーカーはStarChipsです、この部品の機能は「8-bit Serial-In/Parallel-Out Constant Current Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 SCT2168
部品説明 8-bit Serial-In/Parallel-Out Constant Current Driver
メーカ StarChips
ロゴ StarChips ロゴ 




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SCT2168 Datasheet, SCT2168 PDF,ピン配置, 機能
StarChips
Technology
SCT2168 V01_01; May/09
8-bit Serial-In/Parallel-Out Constant Current Driver
Product Description
The SCT2168 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 120mA. The SCT2168
guarantees each output can endure maximum 17V DC voltage stress. The built-in shift
registers and data latches making the SCT2168 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 SCT2168 will satisfy system which needs high volume data
transmission to control the LED display.
Features
‹ 8 constant current sinker with LED power-supply voltage up to 17V
‹ Constant output current : 5 – 120mA@5V, 3 – [email protected]
‹ Excellent current regulation to load, supply voltage and temperature
‹ ±1% Current matching between outputs
‹ ±3% 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 trigger inputs with clock rate up to 25MHz
‹ Operating supply voltage range of 3.3V to 5.5V
‹ Built-in power on reset circuit forces all the outputs off while power on
‹ Built-in thermal protection function to prevent damage from over current operation
‹ Gradually 2ns delayed outputs to lower output switching noise
‹ Package: SOP16, SSOP16,SOP16W
‹ Applications: LED Displays, Variable Message Signs, LED Traffic Signs
Selector Guide
Part
SCT2110
SCT2167
SCT2168
SCT2210
SCT2026
SCT2024
Number of
Outputs
8
8
8
16
16
16
Max Output
Current (mA)
180
60
120
120
90
60
Min PWM Pulse
Width (ns)
100
180
120
50
120
180
Supply
Voltage (V)
5
3.3/5
3.3/5
5
5
3.3/5
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 E-mail: [email protected]
Page 1 of 15

1 Page





SCT2168 pdf, ピン配列
8-bit Serial-In/Parallel-Out Constant-Current LED Driver SCT2168
Truth Table
CLK LA/ OE/
SDI
OUT0 ~ OUT7
SDO
H
L
Dn
Dn Dn-1 ---- Dn-6 Dn-7
Dn-7
L L Dn+1
No change
Dn-6
H
L
Dn+2
Dn+2 Dn+1 ---- Dn-6 Dn-5
Dn-5
X
L
Dn+3
Dn+2 Dn+1 ---- Dn-6 Dn-5
Dn-5
X H Dn+3
Off
Dn-5
Timing Diagram
Data strobed to
OUT7 6 5 4 3 2 1 OUT0
CLK
SDI
LA/
OE/
OUT0
OUT1
OUT2~OUT4
OUT5
OUT6
OUT7
SDO
OFF
ON
OFF
ON
OFF
ON
Page 3 of 15


3Pages


SCT2168 電子部品, 半導体
8-bit Serial-In/Parallel-Out Constant-Current LED Driver SCT2168
Switching Characteristics (Ta=25ºC unless otherwise noted)
Characteristic
Symbol
CLK - OUTn
Propagation
Delay Time
LA/ - OUTn
(“L” to “H”) OE/ - OUTn
CLK - SDO
CLK - OUTn
Propagation
Delay Time
LA/ - OUTn
(“H” to “L”) OE/ - OUTn
CLK - SDO
Pulse Width
CLK
LA/
OE/
Hold Time for LA/
Setup Time for LA/
Output Rise Time of Iout
Output Fall Time of Iout
Output Delay
Slow CLK rise time
Slow CLK fall time
tpLH1
tpLH2
tpLH3
tpLH
tpHL1
tpHL2
tpHL3
tpHL
tw(CLK)
tw(L)
tw(OE/)
th(L)
ts(L)
toR
toF
tdR
tdF
tR
tF
Condition
VDD = 3.3/5V
VLED = 5V
VIH = VDD
VIL= GND
REXT = 1860
RL = 180
CL = 10 pF
OUTn+1- OUTn
Cascade
Min.
-
-
-
-
-
-
-
-
20
20
120
5
5
-
-
-
-
-
-
Typ.
80
80
80
20
80
80
80
20
-
-
-
-
80
80
2
2
-
-
Max.
100
100
100
40
100
100
100
40
-
-
-
-
100
100
-
-
500
500
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Circuit for Switching Characteristics
VIH
VIL
Tr = Tf = 10 nS
REXT
VDD
IDD
VDD
OE/
CLK
OUT0
OUT1
SCT2168
LA/ OUT6
SDI OUT7
REXT SDO
GND
VLED
IOUT
RL
CL
CL
Page 6 of 15

6 Page



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