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PDF CAT4008 Data sheet ( Hoja de datos )
| Número de pieza | CAT4008 | |
| Descripción | 8-Channel Constant Current LED Driver | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CAT4008 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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CAT4008
8-Channel Constant Current LED Driver
FEATURES
8 Constant current-sink channels
Serial interface up to 25MHz clock frequency
3V to 5.5V logic supply
www.DataSheet4U.cLomED current range from 2mA to 100mA
LED current set by external RSET resistor
300mV LED dropout at 30mA
Thermal shutdown protection
Available in RoHS-compliant 16-lead SOIC (150
and 300mil wide), and TSSOP packages
APPLICATIONS
Billboard Display
Marquee Display
Instrument Display
General Purpose Display
For Ordering Information details, see page 13.
DESCRIPTION
The CAT4008 is an 8 channel constant current driver
for LED billboard and other general display
applications. LED channel currents are programmed
together via an external RSET resistor. Low output
voltage operation on the LED channels as low as 0.4V
(for 2 to 100mA LED current) allows for more power
efficient designs.
A high-speed 4-wire serial interface of up to 25MHz
clock frequency controls each individual channel using
a shift register and latch configuration. A serial output
data pin (SOUT) allows multiple devices to be
cascaded and programmed via one serial interface.
The device also includes a blanking control pin
(BLANK) that can be used to disable all channels
independently of the interface.
Thermal shutdown protection is incorporated in the
device to disable the LED outputs if the die
temperature exceeds a set limit.
The device is available in the 16-lead SOIC (narrow
and wide), and TSSOP packages.
TYPICAL APPLICATION CIRCUIT
VIN
3V to
5.5V
1µF
VDD LED1 LED2
LED8
20mA
BLANK
LATCH
SIN
CLK
CAT4008
GND
SOUT
RSET
to next
device
3.09kΩ
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-5034 Rev. A
1 page  
www.DataSheet4U.com
CLK
SIN
SOUT
LATCH
1/fclk
tssu tsh
tcwl tcwh
tod
tlh tlsu
tlwh
Figure 1. Serial Input Timing Diagram
LATCH
BLANK
LED1
LED2
LED8
tld
tls
tbd
tlst = 7 tls
Figure 2. LED Output Timing Diagram
CAT4008
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. MD-5034 Rev. A
5 Page 
SOIC 16-Lead Wide Body 300mils (V) (1)(2)
D
www.DataSheet4U.com
E1 E
PIN #1 IDENTIFICATION
TOP VIEW
b
SIDE VIEW
A
e
A1
CAT4008
SYMBOL
A
A1
b
c
D
E
E1
e
h
L
θ
MIN
2.36
0.10
0.33
0.18
10.08
10.01
7.39
0.25
0.38
0º
NOM
2.49
0.41
0.23
10.31
10.31
7.49
1.27 BSC
0.81
MAX
2.64
0.30
0.51
0.28
10.49
10.64
7.59
0.75
1.27
8º
θ
L
h
END VIEW
c
For current Tape and Reel information, download the PDF file from:
http://www.catsemi.com/documents/tapeandreel.pdf.
Notes:
(1) All dimensions in millimeters. Angle in degrees.
(2) Compiles with JEDEC MS-013.
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. MD-5034 Rev. A
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CAT4008.PDF ] | |
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