LM2754SQX/NOPB National Semiconductor, LM2754SQX/NOPB Datasheet
LM2754SQX/NOPB
Specifications of LM2754SQX/NOPB
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LM2754SQX/NOPB Summary of contents
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... Flash mode. Internal soft-start circuitry lim- its the amount of inrush current during start-up. The LM2754 is available in a small 24-pin thermally en- hanced LLP package. Typical Application Circuit © 2006 National Semiconductor Corporation Features 800mA Output Current n Wide Operating Input Voltage Range: 2.8V to 5.5V n Drives LEDs in Parallel ...
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Connection Diagram 24-pin No-Pullback Leadless Leadframe Package (LLP-24) Pin Descriptions Pin Name 23,24 V INSW OUT 12, 13, 14, 15 D1, D2, D3, D4 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications pins IN OUT EN, T/F, TX, SEL pins Continuous Power Dissipation (Note 3) Junction Temperature (T ) J-MAX-ABS Storage Temperature Range Lead Temp. (Soldering, 5 sec.) ESD Rating (Note 4) ...
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Electrical Characteristics and the 2nd copper layer. Ambient temperature in simulation is 22˚C, still air. Power dissipation is 1W. The value of θ of the LM2754 in LLP-24 could fall in a range as wide conditions. In ...
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Typical Performance Characteristics 3.6V 0V T/F TX SEL capacitors (MLCC’s). Dx Current vs. R SET Quiescent Current vs. Input Voltage Efficiency vs. Input Voltage Unless otherwise specified: ...
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Typical Performance Characteristics 3.6V T/F TX SEL capacitors (MLCC’s). (Continued) Flash Mode with TX Pulse V = 3.6V, Load = 700mA (Flash), LED = PWF1 IN CH1 (TOP): V ...
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Typical Performance Characteristics 3.6V 0V T/F TX SEL capacitors (MLCC’s). (Continued) Battery Ripple, Gain = 1. Li-Ion Battery at 3.7V, Load = 400mA, LED = ...
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Application Information CIRCUIT DESCRIPTION The LM2754 is an adaptive 1x/1.5x/2x CMOS charge pump, optimized for driving Flash LEDs in camera phone and other portable applications. It provides four constant current in- puts, each capable of sinking up to 200mA for ...
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Application Information signal on the TX pin, the LED current level returns to the Flash current level set The TX pin responds to the SET2 > typical logic High ( 1.2V) and logic Low ( levels. Flash ...
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... National highly recommends a 1:1 ratio between the pack- age and the PCB thermal land. To further enhance thermal is the input voltage to conductivity, the PCB thermal land may include vias to a ground plane. For more detailed instructions on mounting LLP packages, please refer to National Semiconductor Ap plication Note AN-1187. LED ...
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