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PDF CAT4002B Data sheet ( Hoja de datos )
| Número de pieza | CAT4002B | |
| Descripción | Constant Current Programmable LED Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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CAT4002B, CAT4003B,
CAT4004B
www.DataSheet4U.com
Constant Current
Programmable LED Driver
with 32 Dimming Levels
Description
The CAT4002B, CAT4003B and CAT4004B provide respectively
two, three and four matched low dropout current sources to drive
LEDs. The CAT400XB requires no external RSET resistor; the LED
current is internally set to 25 mA when the device is first enabled.
Each LED channel includes an individual control loop allowing the
device to handle a wide range of LED forward voltages while still
maintaining tight current matching.
The EN/DIM logic input supports the device enable and a digital
dimming interface for setting the LED channel current with 32 linear
dimming levels.
LEDs can be powered directly from a Lithium−ion battery due to the
low dropout (75 mV at 20 mA) current sinks.
Package options are available including the 4−channel tiny 8−pad
UDFN 2 mm x 2 mm with a max height of 0.55 mm, and 2 or 3−
channel in the 6−lead TSOT−23 and SC−70.
Features
• 2, 3, 4 LED Current Sinks with Tight Matching
• 32 Dimming Levels
• Low Dropout Driver 75 mV at 20 mA
• No Switching Noise
• Shutdown Current less than 1 mA
• 25 mA Max LED Current per Channel
• Dimming via 1−wire EZDimt Interface
• Thermal Shutdown Protection
• RoHS Compliant
• 6−lead TSOT−23, SC−70, and 8−pad UDFN 2 mm x 2 mm Packages
Typical Applications
• LCD Display Backlight
• Cellular Phones
• Digital Still Cameras
http://onsemi.com
UDFN−8
HU2 SUFFIX
CASE 517AW
TSOT23−6
TD SUFFIX
CASE 419AF
SC70−6
SD SUFFIX
CASE 419AD
TYPICAL APPLICATION CIRCUIT
VIN
2.4 V
to
5.5 V
CIN
1 mF
LED1
LED2
VIN
One Wire
Programming
32 Steps
CAT4002B
EN/DIM
GND
ORDERING INFORMATION
See detailed ordering information on page 2 of this data
sheet.
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 2
1
Publication Order Number:
CAT4002B/D
1 page  
CAT4002B, CAT4003B, CAT4004B
www.DataSheet4U.com
TYPICAL CHARACTERISTICS
(CAT4003B, VIN = 4 V, VF = 3.3 V, IOUT = 75 mA (3 LEDs at 25 mA), CIN = 1 μF, TAMB = 25°C unless otherwise specified.)
1.4
−40°C
1.4
1.2
25°C
1.2
1.0
1.0
0.8
0.6
80°C
0.4
2.0 2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE [V]
5.0
5.5
0.8
0.6
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
5.5
Figure 2. EN High Threshold vs. Input Voltage
Figure 3. Quiescent Current vs. Input Voltage
(full load)
1.0
0.8
0.6
0.4
0.2
0.0
−0.2
−0.4
−0.6
−0.8
−1.0
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
5.5
Figure 4. LED Current Change vs. Input Voltage
10
8
6
4
2
0
−2
−4
−6
−8
−10
−40
0 40 80
TEMPERATURE [°C]
120
Figure 5. LED Current Change vs. Temperature
http://onsemi.com
5
5 Page 
D
e
TOP VIEW
CAT4002B, CAT4003B, CAT4004B
PACKAGE DIMENSIONS
TSOT−23, 6 LEAD
CASE 419AF−01
ISSUE O
www.DataSheet4U.com
E1 E
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
θ
MIN
0.01
0.80
0.30
0.12
0.30
0º
NOM
0.05
0.87
0.15
2.90 BSC
2.80 BSC
1.60 BSC
0.95 TYP
0.40
0.60 REF
0.25 BSC
MAX
1.00
0.10
0.90
0.45
0.20
0.50
8º
A2 A
b A1
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-193.
q
L
L1
END VIEW
c L2
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC 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 SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
http://onsemi.com
11
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
CAT4002B/D
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CAT4002B.PDF ] | |
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