LM2758TLEV National Semiconductor, LM2758TLEV Datasheet
LM2758TLEV
Specifications of LM2758TLEV
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LM2758TLEV Summary of contents
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... Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up. LM2758 is offered in National’s tiny 12-bump thin micro SMD package. Typical Application Circuit © 2009 National Semiconductor Corporation LM2758 Features ■ 700 mA Output Current ■ ...
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Connection Diagram Pin Descriptions Pin Name OUT B1 C1+ D2 C1− C2 C2+ D1 C2− A2 SGND C3 LED− A1 EN1 B3 EN2 A3 I SET D3 PGND Ordering Information Order Number LM2758TL LM2758TLX www.national.com ...
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... Human Body Model Machine Model ESD Caution Notice National Semiconductor recommends that all integrated circuits be handled with appropriate ESD precautions. Failure to observe proper ESD handling techniques can result in damage to the device. Electrical Characteristics Limits in standard typeface are for T J ≤ ...
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... Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. MIL-STD-883 3015.7 Note 5: For detailed soldering specifications and information, please refer to National Semiconductor Application Note AN-1112. Note 6: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated ...
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Block Diagram 5 30045319 www.national.com ...
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Typical Performance Characteristics Unless otherwise specified 25° ceramic capacitors (MLCC's). Luxeon PWF1 Flash LED. Efficiency vs V Quiescent Current vs V www.national.com = 3.6V 2.2 µ µF. ...
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LED LED- Shutdown to Flash Mode V = 3.6V 500 mA IN LED Shutdown to Indicator Mode V = 3.6V, I (Torch) = 108 mA, EN2 = 0V IN LED LED Current vs R 30045308 ...
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Torch to Flash Mode Transition EN2 = V = 3.6V, I (Flash) = 500 mA, Gain = 1.5x IN LED www.national.com Indicator to Flash Mode Transition EN1 = V = 3.6V, I (Flash) = 500 mA, Gain = 1.5x IN ...
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Application Information CIRCUIT DESCRIPTION The LM2758 is an adaptive 1x and 1.5x CMOS charge pump, optimized for driving Flash LEDs in camera phone and other portable applications. It provides a constant current of 500 mA (typ.) for Flash mode and ...
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ANALOG BRIGHTNESS CONTROL The current though the LED could be varied dynamically by changing the I current. The above figure shows the circuit. SET The current though the LED can be calculated as follows. CAPACITOR SELECTION The LM2758 requires 4 ...
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... MICRO SMD PACKAGE ASSEMBLY AND USE Use of the micro SMD package requires specialized board layout, precision mounting and careful re-flow techniques as detailed in National Semiconductor Application Note 1112. Refer to the section "Surface Mount Technology (SMD) As sembly Considerations" ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 12–bump micro SMD NS Package Number TLA12 X1 = 1.514 mm ± 30 µ 1.996 mm ± 30 µ 0.600 mm ± 75 µm 12 ...
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Notes 13 www.national.com ...
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