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Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 12
Technical content
Features
- LED Drive Current up to 350 mA
- Compatible with 12 V and 24 V Standard Systems
- Handles Transients up to 40 V
- Single Pin Control and Dimming Function
- Power Efficiency up to 94%
- Drives LED Strings of up to 32 V
- Open and Short LED Protection
- Parallel Configuration for Higher Output Current
- TSOT−23 5−lead Package
- These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
Applications
- 12 V and 24 V Lighting Systems
- Automotive and Aircraft Lighting
- General Lighting, High Brightness 350 mA LEDs
Figure 1. Typical Application Circuit See Table 4 on page 6 for external component selection.
ORDERING INFORMATION
CAT4201TD−GT3 TSOT−23 (Pb−Free) 3,000/ Tape & Reel TF = Specific Device Code Y = Production Year (Last Digit) M = Production Month: (1−9, O, N, D) VBAT SW CTRL GND RSET * Plated Finish: NiPdAu TSOT−23
Table 1. ABSOLUTE MAXIMUM RATINGS should not be assumed, damage may occur and reliability may be affected. Table 2. RECOMMENDED OPERATING CONDITIONS the Recommended Operating Ranges limits may affect device reliability.
- The VBAT pin voltage should be at least 3 V greater than the total sum of the LED forward voltages in order to operate at nominal LED current.
- During power−up, the slew rate of the input supply should be greater than 1 /C0109s for every 5 V increase of VBAT.
Table 3. ELECTRICAL CHARACTERISTICS performance may not be indicated by the Electrical Characteristics if operated under different conditions.
Figure 14. Efficiency vs. LED Current Figure 15. LED Current Regulation vs. Figure 16. LED Current vs. Input Voltage Figure 17. LED Current vs. Input Voltage Figure 18. Switching Waveforms Figure 19. CTRL Power−up
1 LED
2 LEDs
Figure 20. RSET Transient Response Figure 21. Line Transient Response accuracy, LED ripple current, switching frequency and component size. Table 4. EXTERNAL COMPONENT SELECTION
1 LED 2 LEDs
NOTE: Larger C2 capacitor values allow to reduce further the LED ripple current if needed. Table 5. INDUCTOR SELECTION DEPENDING ON VBAT SUPPLY VOLTAGE
Table 6. PIN DESCRIPTION 1 CTRL Analog dimming control and shutdown pin. 3 RSET RSET pin. A resistor connected between the pin and ground sets the average LED current. 4 SW Interface to the inductor. 5 VBAT Supply voltage for the device. handled by the CTRL input pin. current is progressively dimmed until shutdown. connected directly to the ground plane on the PCB. Schottky diode anode should be connected to the SW pin. V oltages of up to 40 V can be safely handled on the SW pin. “open−LED” or “shorted−LED” fault conditions.
Figure 22. CAT4201 Simplified Block Diagram
1.2 V 1 /C0087
12 V/24 V
driven with bias currents of up to 350 mA. linearly back to zero current. Table 7. RSET RESISTOR SELECTION
www.onsemi.com PACKAGE DIMENSIONS TSOT−23, 5 LEAD CASE 419AE−01 ISSUE O E1 E e b D c A TOP VIEW SIDE VIEW END VIEW L Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-193. SYMBOL θ MIN NOM MAX /C0113 A b c D E e L 0º 8º 0.01 0.80 0.30 0.12 0.30 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
1.00 0.10 0.90 0.45 0.20 0.50 3. All packages are RoHS−compliant (Lead−free, Halogen−free). 4. The standard plated finish is NiPdAu on all pins. 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 the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidia ries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed 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 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: 81−3−5817−1050 CAT4201/D LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 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: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative