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PDF CAT4004 Data sheet ( Hoja de datos )
| Número de pieza | CAT4004 | |
| Descripción | 4-Channel Constant Current LED Driver | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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CAT4004
4-Channel Constant Current LED Driver with EZDim™
FEATURES
DESCRIPTION
Four LED current sinks with tight matching
The CAT4004 provides four matched low dropout current
Low Dropout Driver 130mV at 30mA
No switching noise
Shutdown current < 1μA
sources to drive LEDs. An external resistor on RSET sets
the current in the LED channels. Each LED channel
includes an individual control loop allowing the device to
handle a wide range of LED forward voltages while still
LED current set by external resistor
maintaining tight current matching.
Dimming via 1-wire EZDimTM interface
Thermal shutdown protection
RoHS Compliant
The EN/DIM logic inputs supports device enable and a
digital dimming interface for current setting of all LEDs.
Six different current dimming ratios are available.
8-lead 2mm x 3mm TDFN package
The device is aimed at “direct drive” battery applications.
APPLICATIONS
LCD Display Backlight
Cellular Phones
It is required that the battery or voltage source have
enough headroom to drive the LED forward voltage and
current sink (>150mV).
Digital Still Cameras
Handheld Devices
The device is available in a tiny 8-lead TDFN 2mm x 3mm
package with a max height of 0.8mm.
www.DataSheet4U.com
ORDERING INFORMATION
Part
Number
CAT4004VP2-T3
Notes:
(1) Lead finish Matte-Tin
(2) Quantity per reel is 3000
Package
TDFN-8
2x3mm (1)
Package
Marking
FT
For Ordering Information details, see page 10.
PIN CONFIGURATION
8-lead TDFN Package
(Top View)
EN/DIM 1
GND 2
LED1 3
LED2 4
CAT4004
8 VIN
7 RSET
6 LED4
5 LED3
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
TYPICAL APPLICATION CIRCUIT
VIN
2.4V
to
5.5V
CIN
1µF
20mA
LED1 LED2 LED3 LED4
One wire
programming
RSET
3.8kΩ
VIN
EN/DIM
RSET
CAT4004
GND
1 Doc. No. 5024 Rev. A
1 page  
CAT4004
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 4V, VF = 3.3V, IOUT = 80mA (4 LEDs at 20mA), CIN = 1μF, TAMB = 25°C unless otherwise specified.
RSET Pin Voltage vs. Input Voltage
0.7
RSET Pin Voltage vs. Temperature
0.7
0.6 0.6
0.5 0.5
0.4 0.4
0.3 0.3
0.2
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
LED Current vs. LED Pin Voltage
40
0.2
-40
0 40 80
TEMPERATURE [°C]
120
Dropout Characteristics
40
30 30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
LED PIN VOLTAGE [V]
Efficiency vs. Input Voltage
100
90
80
70
60
50
5.0
4.5 4.0 3.5 3.0 2.5
INPUT VOLTAGE [V]
2.0
20
10
0
0 50 100 150 200 250 300
LED PIN VOLTAGE [mV]
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. 5024 Rev. A
5 Page 
REVISION HISTORY
Date
Rev. Reason
03/15/2007 A Initial Issue
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, and Quad-Mode™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
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.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled
"Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical
semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
2975 Stender Way
Santa Clara, CA 95054
Phone: 408.542.1000
Fax: 408.542.1200
www.catsemi.com
Document No: 5024
Revision:
A
Issue date: 03/15/07
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CAT4004.PDF ] | |
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