CAT37TDI-GT3 ON Semiconductor, CAT37TDI-GT3 Datasheet
CAT37TDI-GT3
Specifications of CAT37TDI-GT3
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CAT37TDI-GT3 Summary of contents
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... PIN CONNECTIONS 1 SW GND FB (Top View Maximum Height = 250°C/W (free air MARKING DIAGRAM LMYM LM = CAT37TDI− CAT37TDI−GT3 Y = Production Year (Last Digit Production Month (1− ORDERING INFORMATION Device Package CAT37TDI−T3 TSOT−23 (Note 1) (Pb−Free) CAT37TDI−GT3 TSOT−23 (Note 2) (Pb− ...
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Typical Application Circuit VIN OFF Figure 1. Driver for Four High−Brightness White LEDs Table 1. PIN DESCRIPTION Pin Number Name 1 SW Switch pin. This is the drain of the internal ...
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Table 4. ELECTRICAL OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified. T Symbol Parameter Input Voltage Range I Quiescent Current Q I Shutdown Current Pin Voltage Pin Leakage Current FB Shutdown High Threshold ...
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25° AMB 30 3 LEDs INPUT VOLTAGE (V) Figure 2. LED Current vs. Input Voltage 110 105 100 3 LEDs 95 90 ...
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25° AMB LEDs VOUT = INPUT VOLTAGE (V) Figure 8. Efficiency vs. Input Voltage Figure 10. ...
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Operation The CAT37 device is a high efficiency, constant frequency, current regulating boost driver for white LEDs. The device includes a switch and an internally compensated loop for the regulation of the current in the LEDs. Operation can be best ...
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... R1. Most white LEDs are driven at maximum currents mA. Some higher power designs will use two parallel strings of LEDs for greater light output, resulting (two strings mA) flowing through the R1 resistor. http://onsemi.com 7 Supplier ON Semiconductor www.onsemi.com 800.282.9855 R1 (W) 2.37 3.16 4.75 6.34 7.87 9 ...
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LED Dimming with DC Signal Dimming the LEDs can be done by applying a variable DC voltage as shown on Figure 14. As the V voltage across R1 decreases and therefore lower the LED current. The resistors R2 and R3 ...
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L1 6 4.2 V VIN V DC Dimming VIN SW 180 kW CAT37 3 4 SHDN FB GND 2 Figure 17. Two LEDs with DC Level Dimming Control L1 D1 ...
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TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-193. PACKAGE DIMENSIONS TSOT−23, 5 LEAD CASE 419AE−01 ISSUE O SYMBOL MIN A A1 0.01 A2 ...
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... All packages are RoHS−compliant (Lead−free, Halogen−free). 4. The standard lead finish is NiPdAu. 5. The device used in the above example is a CAT37TDI−GT3 (TSOT−23, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/Reel). 6. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. ...