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PDF CAT4002A Data sheet ( Hoja de datos )
| Número de pieza | CAT4002A | |
| Descripción | Constant Current LED Driver | |
| Fabricantes | ON Semiconductor | |
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CAT4002A, CAT4004A
Constant Current LED
Driver with 32 Dimming
Levels and Rset
Description
The CAT4002A and CAT4004A provide respectively two and four
matched low dropout current sources to drive LEDs. The CAT400XA
uses an external resistor RSET to set 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
maintaining tight current matching.
The EN/DIM logic inputs supports 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 (50 mV at 20 mA) current sinks. The device is available
in the tiny 8−pad UDFN 2 mm x 2 mm package with a max height of
0.55 mm, as well as the 6−lead TSOT−23 and SC−70.
Features
• 2 and 4 LED Current Sinks with Tight Matching
• 32 Dimming Levels
• Low Dropout Driver 50 mV at 20 mA
• No Switching Noise
• Shutdown Current less than 1 mA
• LED Current set by External Resistor
• Dimming via 1−wire EZDimt Interface
• Thermal Shutdown Protection
• 6−lead TSOT−23, SC−70, and 8−pad UDFN 2 mm x 2 mm Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• LCD Display Backlight
• Cellular Phones
• Digital Still Cameras
• Handheld Devices
VIN
2.4 V
to
5.5 V
CIN
1 mF
20 mA
LED1 LED2 LED3 LED4
One wire
programming
RSET
3.74 kW
VIN
EN/DIM
RSET
CAT4004A
GND
Figure 1. Typical Application Circuit
http://onsemi.com
UDFN−8
HU2G SUFFIX
CASE 517AW
TSOT23−6
TD SUFFIX
CASE 419AF
SC70−6
SD SUFFIX
CASE 419AD
PIN CONNECTIONS
1
EN/DIM
GND
LED1
LED2
VIN
RSET
LED4
LED3
CAT4004A
UDFN−8
1
EN/DIM
LED1
GND
RSET
VIN LED2
CAT4002A
TSOT23−6
1
EN/DIM
RSET
VIN
CAT4002A
SC70−6
(Top Views)
LED1
GND
LED2
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
June, 2011 − Rev. 2
1
Publication Order Number:
CAT4002A/D
1 page  
CAT4002A, CAT4004A
TYPICAL PERFORMANCE CHARACTERISTICS
(CAT4002A, VIN = 4 V, VF = 3.3 V, IOUT = 50 mA (2 LEDs at 25 mA), CIN = 1 mF, TAMB = 25°C unless otherwise specified.)
30 100
25 mA
25 90
20
80
15
70
10
5 60
1 mA
0 50
0 50 100 150 200 250 300
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
LED PIN VOLTAGE (mV)
INPUT VOLTAGE (V)
Figure 9. Dropout Characteristics
Figure 10. Efficiency vs. Input Voltage
Figure 11. Power Up Waveform
Figure 12. Power Down Waveform
Figure 13. Line Transient Waveform
Figure 14. Dimming Levels
http://onsemi.com
5
5 Page 
CAT4002A, CAT4004A
Example of Ordering Information (Note 4)
Prefix
CAT
Device #
4004A
Suffix
HU2
−G
T3
Company ID
(Optional)
Product Number
4002A
4004A
Package
HU2: UDFN
TD: TSOT
SD: SC70
Lead Finish
G: NiPdAu
Tape & Reel (Note 6)
T: Tape & Reel
3: 3,000 Units / Reel
Table 8. ORDERING INFORMATION
Part Number
Package
Quantity per Reel
CAT4002ASD−GT3
SC70−6
3,000
CAT4002ATD−GT3
TSOT−23
3,000
CAT4004AHU2−GT3
UDFN−8 (2 x 2 mm)
3,000
2. All packages are RoHS−compliant (Lead−free, Halogen−free).
3. The standard lead finish is NiPdAu.
4. The device used in the above example is a CAT4004AHU2−GT3 (UDFN, NiPdAu, Tape & Reel, 3,000/Reel).
5. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.
6. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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
CAT4002A/D
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CAT4002A.PDF ] | |
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