cat4008 Catalyst Semiconductor, cat4008 Datasheet

no-image

cat4008

Manufacturer Part Number
cat4008
Description
8-channel Constant Current Led Driver
Manufacturer
Catalyst Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
cat4008V
Manufacturer:
Catalyst
Quantity:
4
Part Number:
cat4008V-T1
Manufacturer:
MARVELL
Quantity:
201
Company:
Part Number:
cat4008V-T1
Quantity:
595
Part Number:
cat4008VZ
Manufacturer:
ON
Quantity:
5 510
Part Number:
cat4008VZ
Manufacturer:
TI
Quantity:
5 510
Part Number:
cat4008W-T2
Manufacturer:
ON Semiconductor
Quantity:
1 894
Part Number:
cat4008Y-T2
Manufacturer:
ON/安森美
Quantity:
20 000
8-Channel Constant Current LED Driver
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
VIN
3V to
5.5V
For Ordering Information details, see page 13.
8 Constant current-sink channels
Serial interface up to 25MHz clock frequency
3V to 5.5V logic supply
LED 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
Billboard Display
Marquee Display
Instrument Display
General Purpose Display
1µF
VDD
BLANK
LATCH
SIN
CLK
LED1
CAT4008
LED2
GND
LED8
SOUT
RSET
20mA
to next
device
3.09kΩ
1
DESCRIPTION
The CAT4008 is an 8 channel constant current driver
for
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.
LED
billboard
and
other
general
CAT4008
Doc. No. MD-5034 Rev. A
display

Related parts for cat4008

cat4008 Summary of contents

Page 1

... SIN CLK GND © Catalyst Semiconductor, Inc. Characteristics subject to change without notice DESCRIPTION The CAT4008 channel constant current driver for LED billboard 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 ...

Page 2

... LED7 6 11 LED3 LED6 7 10 LED4 LED5 8 9 Notes: (1) Matte-Tin Plated Finish (RoHS-compliant). (2) Contact factory for package availability. Doc. No. MD-5034 Rev. A Quantity per Reel Package Marking 2000 CAT4008W 1000 CAT4008V 2000 CAT4008Y 2 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice ...

Page 3

... SET R = 3.08kΩ SET R = 769Ω SET V = 5V, outputs off LED GND -1mA 1mA OL BLANK high, outputs off 3 CAT4008 Units 6 V +0. 150 mA °C °C 300 °C Range Units °C Min Typ Max Units ...

Page 4

... LATCH to LED1 off/on LED(n) to LED(n+1) LED1 to LED8 BLANK to LED(n) off/on Pull-up resistor = 50Ω to 3.0V Pull-up resistor = 50Ω 15pF 15pF L CLK to SOUT 1µF VDD LED1 BLANK CAT4008 LATCH LED8 SIN CLK SOUT RSET GND RSET 4 (1) (2) (1) Min Typ Max Units ...

Page 5

... LATCH LATCH BLANK LED1 LED2 LED8 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1/f clk cwl cwh lwh Figure 1. Serial Input Timing Diagram lst ls Figure 2. LED Output Timing Diagram 5 CAT4008 t lsu t bd Doc. No. MD-5034 Rev. A ...

Page 6

... CAT4008 TYPICAL PERFORMANCE CHARACTERISTICS V = 5.0V, LED current 30mA, all LEDs On LED Current vs. LED Pin Voltage 0.0 0.3 0.6 0.9 LED PIN [V] LED Current vs. VDD Pin Voltage 31.5 31.0 30.5 30.0 29.5 29.0 28.5 3.0 3.5 4.0 4.5 VDD [V] RSET Voltage vs. VDD Pin Voltage 1.30 1.25 1.20 1.15 1.10 3.0 3.5 4.0 4.5 VDD [V] Doc. No. MD-5034 Rev 25°C unless otherwise specified. ...

Page 7

... Characteristics subject to change without notice = 25°C unless otherwise specified. AMB LED Current vs. Temperature 31.5 31.0 30.5 30.0 29.5 29.0 28.5 100 150 Internal Pull-Up Current (BLANK pin CAT4008 - 100 150 TEMPERATURE [° BLANK VOLTAGE [V] BLANK Transient Response Doc. No. MD-5034 Rev ...

Page 8

... CAT4008 PIN DESCRIPTION Name Function GND Ground SIN Serial data input pin CLK Serial clock input pin LATCH Latch serial data to output registers LED1-LED8 LED channel cathode terminals BLANK Enable / disable all channels SOUT Serial data output pin. RSET LED current set pin ...

Page 9

... BLOCK DIAGRAM VDD VIN BLANK LATCH SIN CLK Figure 2. CAT4008 Functional Block Diagram BASIC OPERATION The CAT4008 uses 8 tightly matched current sinks to accurately regulate the LED current in each channel. The external resistor used to set the LED SET ≅ × LED current ...

Page 10

... CAT4008 PACKAGE OUTLINE DRAWINGS SOIC 16-Lead Narrow Body 150mils (W) PIN#1 IDENTIFICATION TOP VIEW SIDE VIEW 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-012 Doc. No. MD-5034 Rev. A ...

Page 11

... 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 (1)(2) SYMBOL θ A θ CAT4008 MIN NOM MAX 2.36 2.49 2.64 0.10 0.30 0.33 0.41 0.51 0.18 0.23 0.28 10.08 10.31 10.49 10.01 10.31 10.64 7.39 7.49 7.59 1.27 BSC 0.25 0.75 ...

Page 12

... CAT4008 (1)(2) TSSOP 16-Lead 4.4mm ( PIN#1 IDENTIFICATION TOP VIEW D SIDE VIEW 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 MO-153. Doc. No. MD-5034 Rev. A SYMBOL MIN A A1 0.05 A2 0.85 b 0.19 c ...

Page 13

... All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is Matte-Tin. (3) The device used in the above example is a CAT4008W–T2 (SOIC 16-Lead 150 mils, Matte-Tin, Tape & Reel 2000). (4) Contact factory for package availability. (5) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. ...

Page 14

... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...

Related keywords